&EPA United States Environmental Protection Agency ------- Table of Contents Chapter Page No. 1, A Consumer's Guide To The Nation's Drinking Water •. 1 2. How Safe Is My Drinking Water? 2 3. Where Does My Drinking Water Come From And How Is It Treated? 7 4. How Do We Use Drinking Water In Our Homes? 10 5. What's Being Done To Improve Water Security? 13 6. What Can I Do If There Is A Problem With My Drinking Water? 15 7, How Safe Is The Drinking Water In My Household Well? 18 8. What You Can Do To Protect Your Drinking Water 21 Appendix A: National Primary Drinking Water Standards as of 10/03 23 Appendix B: References .28 Appendix C: Sources of Additional Information 29 Appendix D: Glossary 31 Office of Water (4601) EPA816-K-03-007 www.epa.gov/safewater October 2003 Printed on RefydlQd Paper Internet Address (DHL) • http://www.epa.gov Recycled/Recyclable * Printed with Vegetable Oil Based Inks on 100% Postconsumer, Process Chlorine Free Recycled Paper ------- 1. A Consumer's Guide To The Nation's Drinking Water The United States enjoys one of the best supplies of drinking water in the world. Nevertheless, many of us who once gave little or no thought to the water that comes from our taps are now asking the ques- tion: "Is my water safe to drink?" While tap water that meets federal and state standards is generally safe to drink, threats to drinking water are increasing. Short-term disease outbreaks and water restrictions during droughts have demonstrated that we can no longer take our drinking water for granted. Consumers have many questions about their drinking water. How safe is my drinking water? What is being done to improve security of public water systems? Where does my drinking water come from, and how is it treated? Do private wells receive the same pro- tection as public water systems? What can I do to help protect my drinking water? www.epa.gov/safewater This booklet provides the answers to these and other frequently asked questions. This booklet also directs you to more detailed sources of information. Often, you will be directed to a page on the EPA website. Additionally, the Safe Drinking Water Hotline is available to answer your questions. Please also see Appendix C for more resources. Refer to the Glossary (Appendix D) for definitions of words in bold font. What you need to know to protect your family Sensitive Subpopulations Some people may be more vulnerable to con- taminants in drinking water than the general population. People undergoing chemotherapy or living with HIV/AIDS, transplant patients, children and infants, the frail elderly, and preg- nant women and their fetuses can be particu- larly at risk for infections. If you have special health care needs, con- sider taking additional precautions with your drinking water, and seek advice from your health care provider. For more information, see www.epa.gov/safewater/healthcare/ special.html. You will find information on bottled water and home water treatment units on page 16 of this booklet. You may also contact NSF International, Underwriter's Laboratory, or the Water Quality Association. Contact information is located in Appendix C. Safe Drinking Water (SOW) Hotline: 800-426-4791 3 ------- 2. How Safe Is My Drinking Water? What Law Keeps My Drinking Water Safe? Congress passed the Safe Drinking Water Act (SDWA) in 1974 to protect public health by regulat- ing the nation's public drinking water supply and protecting sources of drinking water. SDWA is administered by the U.S. Environmental Protection Agency (EPA) and its state partners. Highlights of the Safe Drinking Water Act • Authorizes EPA to set enforceable health stan- dards for contaminants in drinking water • Requires public notification of water systems violations and annual reports (Consumer Confidence Reports) to customers on con- taminants found in their drinking water - www.epa.gov/safewater/ccr • Establishes a federal-state partnership for regu- lation enforcem$nt . • Includes provisions specifically.designed to protect underground sources of drinking water - www.epa.gay/Safewater/uic • Requires disinfection of surface water supplies, except those with pristine, protected sources * Establishes a multi-billion-dollarstate'-revolv- ing loan fund for water system upgrades - www.epa.gov/saf0water/dwsrf • Requires an assessment of the vulnerability of all drinking water sources to contamination - www.epa.goy/safewater/protect — Drinking Water; Past, Present, and.Future EPA-816'F'00-Q02 What Is A Public Water System? The Safe Drinking Water Act (SDWA) defines a public water system (PWS) as one that serves piped water to at least 25 persons or 15 service connections for at least 60 days each year. There are approxi- mately 161,000 public water systems in the United States.1 Such systems may be publicly or privately owned. Community water systems (CWSs) are public water systems that serve people year-round in their homes. Most people in the U.S. (268 million) get their water from a community water system. EPA also regulates other kinds of public water systems, Public Water Systems Community Water System (54,000 systems)^ A public water system that serves the same people year-round. Most residences are served by Community Water Systems. Non-Community Water System (approximately 108,000 systems)—A public water system that does not serve the same people year-round. There are two types of non-community systems: • Non-Transient Non-Community Water System (a/most 19,000 systems)—A non- community water system that serves the same people more than six months of the year, but not year-round. For example, a school with its own water supply is consid- ered a non-transient system. • Transient Non-Community Water System (more than 89,000 systems)—A non- community water system that serves the public but not the same individuals for more than six months. For example, a rest area or a campground may be considered a transient system. www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- such as those at schools, campgrounds, factories, and restaurants. Private water supplies, such as household wells that serve one or a few homes, are not regulated by EPA. For information on household wells, see "How Safe Is The Drinking Water In My Household Well?" on page 18 of this booklet. Cost of Making Water Safe Continues to Rise Much of the existing water infrastructure (underground pipes, treatment plants, and other facilities) was built many years ago. In 1999, EPA conducted the second Drinking Water Infrastructure Needs Survey, and found that drinking water systems will need to invest $150 billion over a 20-year period to ensure clean and safe drinking water. Will Water Systems Have Adequate Funding In The Future? Nationwide, drinking water systems have spent hun- dreds of billions of dollars to build drinking water treatment and distribution systems. From 1995 to 2000, more than $50 billion was spent on capital investments to fund water quality improvements.2 With the aging of the nation's infrastructure, the clean water and drinking water industries face a signifi- cant challenge to sustain and advance their achieve- ments in protecting public health. EPA's Clean Water & Drinking Water Infrastructure Gap Analysis^ has found that if present levels of spending do not increase, there will be a significant funding gap by the year 2019. Where Can I Find Information About My Local Water System? Since 1999, water suppliers have been required to provide annual Consumer Confidence Reports to their customers. These reports are due by July 1 each year, and contain information on contaminants found www.epa.gov/safewater in the drinking water, possible health effects, and the water's source. Some Consumer Confidence Reports are available at www.epa.gov/safewater/dwinfo.htm. Water suppliers must promptly inform you if your water has become contaminated by something that can cause immediate illness. Water suppliers have 24 hours to inform their customers of violations of EPA standards "that have the potential to have seri- ous adverse effects on human health as a result of short-term exposure." If such a violation occurs, the water system will announce it through the media, and must provide information about the potential adverse effects on human health, steps the system is taking to correct the violation, and the need to use alternative water supplies (such as boiled or bottled water) until the problem is corrected. Systems will inform customers about violations of less immediate concern in the first water bill sent after the violation, in a Consumer Confidence Report, or by mail within a year. In 1998, states began com- piling information on individual systems, so you can evaluate the overall quality of drinking water in your state. Additionally, EPA must compile and summarize the state reports into an annual report on the condi- tion of the nation's drinking water. To view the most recent annual report, see www.epa.gov/safewater/annual. How Often Is My Water Supply Tested? EPA has established pollutant-specific minimum test- ing schedules for public water systems. To find out how frequently your drinking water is tested, contact your water system or the agency in your state in charge of drinking water. If a problem is detected, immediate retesting require- ments go into effect along with strict instructions about how the system informs the public. Until the system can reliably demonstrate that it is free of problems, the retesting is continued. In 2001, one out of every four community water systems did not conduct testing or report the results for all of the monitoring required to verify the safety SOW Hotline: 800-426-4791 ------- of their drinking water.4 Although failure to monitor does not necessar- ily suggest safety problems, conduct- ing the required reporting is crucial to ensure that problems will be detected. Consumers can help make sure certain monitoring and reporting requirements are met by first contacting their state drinking water agency to determine if their water supplier is in compliance. If the water system is not meeting the requirements, consumers can work with local and state officials and the water supplier to make sure the required mon- itoring and reporting occurs. A network of government agencies monitor tap water suppliers and enforce drinking water standards to ensure the safety of public water supplies. These agencies include EPA, state depart- ments of health and environment, and local public health departments. Reported Community Water Systems Violating Maximum Contaminant Levels or Treatment Standards in FY 2002 D District of Columbia D 0% - 6% of Systems -11% of Systems • 11+% of Systems Common Sources of Pollution Naturally Occurring: microorganisms (wild- life and soils), radionuclides (underlying rock), nitrates and nitrites (nitrogen compounds in the soil), heavy metals (underground rocks containing arsenic, cadmium, chromium, lead, and selenium), fluoride. Human Activities: bacteria and nitrates (human and animal wastes—septic tanks and large farms), heavy metals (mining construc- tion, older fruit orchards), fertilizers and pes- ticides (used by you and others (anywhere crops or lawns are maintained)), industrial products and wastes (local factories, indus- trial plants, gas stations, dry cleaners, leak- ing underground storage tanks, landfills, and waste dumps), household wastes (cleaning solvents, used motor oil, paint, paint thinner), lead and copper (household plumbing materi- als), water treatment chemicals (wastewater treatment plants). www.epa.gov/safewater Nevertheless, problems with local drinking water can, and do, occur. What Problems Can Occur? Actual events of drinking water contamination are rare, and typically do not occur at levels likely to pose health concerns. However, as development in our modern society increases, there are growing numbers of activities that can contaminate our drink- ing water. Improperly disposed-of chemicals, animal and human wastes, wastes injected underground, and naturally occurring substances have the potential to contaminate drinking water. Likewise, drinking water that is not properly treated or disinfected, or that travels through an improperly maintained distribution system, may also pose a health risk. Greater vigilance by you, your water supplier, and your government can help prevent such events in your water supply. Contaminants can enter water supplies either as a result of human and animal activities, or because they occur naturally in the environment. Threats to your drinking water may exist in your neighborhood, or may occur many miles away. For more information on drinking water threats, see www.epa.gov/safewater/ SOW Hotline: 800-426-4791 ------- publicoutreach/landscapeposter.html. Some typical examples are microbial contamination, chemical con- tamination from fertilizers, and lead contamination. Boil Water Notices for Microbial Contaminants When microorganisms such as those that indicate fecal contamination are found in drinking water, water suppliers are required to issue "Boil Water Notices." Boiling water for one minute kills the microorgan- isms that cause disease. Therefore, these notices serve as a precaution to the public. www.epa.gov/safewater/faq/emerg.html Microbial Contamination: The potential for health problems from microbial- contaminated drinking water is demonstrated by localized outbreaks of waterborne disease. Many of these outbreaks have been linked to contamination by bacteria or viruses, probably from human or animal wastes. For example, in 1999 and 2000, there were 39 reported disease outbreaks associated with drinking water, some of which were linked to public drinking water supplies.5 Certain pathogens (disease-causing microorgan- isms), such as Cryptosporidium, may occasionally pass through water filtration and disinfection process- es in numbers high enough to cause health problems., particularly in vulnerable members of the population. Cryptosporidium causes the gastrointestinal disease, cryptosporidiosis, and can cause serious, some- times fatal, symptoms, especially among sensitive members of the population. (See box on Sensitive Subpopulations on page 1.) A serious outbreak of crypto sporidiosis occurred in 1993 in Milwaukee, Wisconsin, causing more than 400,000 persons to be infected with the disease, and resulting in at least 50 deaths. This was the largest recorded outbreak of waterborne disease in United States history.6 www.epa.gov/safewater Excessive levels of nitrates can cause "blue baby syndrome," which can be fatal without immediate medical attention. Chemical Contamination From Fertilizers: Nitrate, a chemical most commonly used as a fertil- izer, poses an immediate threat to infants when it is found in drinking water at levels above the national standard. Nitrates are converted to nitrites in the intestines. Once absorbed into the bloodstream, nitrites prevent hemoglobin from transporting oxy- gen. (Older children have an enzyme that restores hemoglobin.) Excessive levels can cause "blue baby syndrome," which can be fatal without immediate medical attention. Infants most at risk for blue baby syndrome are those who are already sick, and while they are sick, consume food that is high in nitrates or drink water or formula mixed with water that is high in nitrates. Avoid using water with high nitrate levels for drinking. This is especially important for infants and young children, nursing mothers, pregnant women and certain elderly people. Nitrates: Do NOT Boil Do NOT boil water to attempt to reduce nitrates. Boiling water contaminated with nitrates increases its concentration and potential risk. if you are concerned about nitrates, talk to your health care provider about alternatives to boiling water for baby formula. SDW Hotline: 800-426-4791 ------- Lead Contamination: Lead, a metal found in natural deposits, is commonly used in household plumbing materials and water ser- vice lines. The greatest exposure to lead is swallow- ing or breathing in lead paint chips and dust. But lead in drinking water can also cause a variety of adverse health effects. In babies and children, exposure to lead in drinking water above the maximum contaminant level can result in delays in physical and mental devel- opment, along with slight deficits in attention span and learning abilities. In adults, it can cause increases in blood pressure. Adults who drink this water over many years could develop kidney problems or high blood pres- sure. Lead is rarely found in source water, but enters tap water through corrosion of plumbing materials. Very old and poorly maintained homes may be more likely to have lead pipes, joints, and solder. However, new homes are also at risk: even legally "lead-free" pipes may contain up to 8 percent lead. These pipes can leave significant amounts of lead in the water for the first several months after their installation. For more information on lead contamination, see www.epa.gov/ safewater/contaminants/dw_contamfs/lead.html. Lead: Do NOT Boil Do NOT boil water to attempt to reduce lead, Boilirfg water increases lead concentration. Always use water from the cold tap for pre- paring baby formula, cooking, and drinking. Flush pipes first by running the water before using it. Allow the water to run until it's cold. If you have high lead levels in your tap water, talk to your health care provider about alter- natives to using boiled water in baby formula. For more information on drinking water contaminants that are regulated by EPA, see Appendix A, or visit www.epa.gov/safewatef/mcl.html. Where Can I Find More Information About My Drinking Water? Drinking water varies from place to place, depending on the water's source and the treatment it receives. If your drinking water comes from a community water system, the system will deliver to its customers annual drinking water quality reports (or Consumer Confidence Reports). These reports will tell consumers what contaminants have been detected in their drinking water, how these detection levels compare to drink- ing water standards, and where their water comes from. The reports must be provided annually before July 1, and, in most cases, are mailed directly to customers' homes. Contact your water suppli- er to get a copy of your report, or see if your report is posted online at www.epa.gov/safewater/dwinfo.htm. Your state's department of health or environment can also be a valuable source of information. For help in locating these agencies, call the Safe Drinking Water Hotline. Further resources can be found in Appendix C. Information on testing household wells is on page 19. www.epa.gov/safewater 1 Factoids: Drinking Water & Ground Water Statistics for 2002, 2003. 2 Community Water Systems Survey 2000, Volume I, 2001. 3 The Clean Water and Drinking Water Infrastructure Gap Analysis, EPA 816-R-02-020. 4 Factoids: Drinking Water and Ground Water Statistics for 2001, EPA8I6-K-02-004. 5 Morbidity and Mortality Weekly Report: Surveillance for Waterhorne Disease Outbreaks, United States 1999-2000, 2002. 6 25 Years of the Safe Drinking Water Act, 1999. SOW Hotline: 800-426-4791 ------- 3. Where Does My Drinking Water Come From And How Is It Treated? Your drinking water comes from surface water or ground water. The water that systems pump and treat from sources open to the atmosphere, such as rivers, lakes, and reservoirs is known as surface water. Water pumped from wells drilled into under- ground aquifers, geologic formations containing water, is called ground water. The quantity of water produced by a well depends on the nature of the rock, sand, or soil in the aquifer from which the water is drawn. Drinking water wells may be shallow (50 feet or less) or deep (more than 1,000 feet). More water systems have ground water than surface water as a source (approx. 147,000 v. 14,500), but more people drink from a surface water system (195 million v. 101,400). Large-scale water supply systems tend to rely on surface water resources, while smaller water systems tend to use ground water. Your water utility or public works department can tell you the source of your public water supply. How Does Water Get To My Faucet? An underground network of pipes typically delivers drinking water to the homes and businesses served by the water system. Small systems serving just a hand- ful of households may be relatively simple, while large metropolitan systems can be extremely com- plex—sometimes consisting of thousands of miles of pipes serving millions of people. Drinking water must meet required health standards when it leaves the treatment plant. After treated water leaves the plant, it is monitored within the distribution system to identify and remedy any problems such as water main breaks, pressure variations, or growth of microorganisms. How Is My Water Treated To Make It Safe? Water utilities treat nearly 34 billion gallons of water every day.1 The amount and type of treatment applied varies with the source and quality of the water. Generally, surface water systems require more treat- ment than ground water systems because they are directly exposed to the atmosphere and runoff from rain and melting snow. Water suppliers use a variety of treatment processes to remove contaminants from drinking water. These individual processes can be arranged in a "treatment train" (a series of processes applied in a sequence). The most commonly used processes include coagu- lation (flocculation and sedimentation), filtration, and disinfection. Some water systems also use ion exchange and adsorption. Water utilities select the treatment combination most appropriate to treat the contaminants found in the source water of that par- ticular system. Coagulation (Flocculation & Sedimentation): Flocculation: This step removes dirt and other par- ticles suspended in the water. Alum and iron salts or synthetic organic polymers are added to the water to form tiny sticky particles called "floe," which attract the dirt particles. All sources of drinking water contain some naturally occurring contaminants. At low levels, these contaminants generally are not harmful in our drinking water. Removing all contaminants would be extremely expensive, and in most cases, would not provide increased protection of public health. A few naturally occurring min- erals may actually improve the taste of drinking water and may even have nutritional value at low levels. www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Sedimentation: The flocculated particles then settle naturally out of the water. Filtration: Many water treatment facilities use filtration to remove all particles from the water. Those particles include clays and silts, natural organic matter, precip- itates from other treatment processes in the facility, iron and manganese, and microorganisms. Filtration clarifies the water and enhances the effectiveness of disinfection. Water Treatment Plant Follow a drop of water from the source through the treatment process. Water may be treated differently in different communities depending on the quality of the water which enters the plant. Groundwater is located underground and typically requires less treatment than water from lakes, rivers, and streams. Coagulation removes dirt and other particles suspended in water. Alum and other chemicals are added to water to form tiny sticky particles called "floe" which attract the dirt particles. The combined weight of the dirt and the alum (Hoc) become heavy enough to sink to the bottom during sedimentation. Sedimentation: The heavy particles (floe) settle to the bottom and the clear water moves to filtration. Disinfection: A small amount of chlorine is added or some other disinfection method is used to kill any bacteria or microorganisms that may be in the water. Storage: Water is placed in a closed tank or reservoir for disinfection to take place. The water then flows through pipes to homes and businesses in the community. Filtration: The water passes through filters, some made of layers of sand, gravel, and charcoal that help remove even smaller particles. Source: AWWA Drinking Water Week Blue Thumb Kit www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Disinfection: Disinfection of drinking water is considered to be one of the major public health advances of the 20th century. Water is often disinfected before it enters the distribution system to ensure that dangerous micro- bial contaminants are killed. Chlorine, chlorinates, or chlorine dioxides are most often used because they are very effective disinfectants, and residual concen- trations can be maintained in the water system. Water System Filtration Tank Why Is My Water Bill Rising? The cost of drinking water is rising as suppliers meet the needs of aging infrastructure, comply with pub- lic health standards, and expand service areas. In most cases, these increasing costs have caused water suppliers to raise their rates. However, despite rate increases, water is generally still a bargain compared to other utilities, such as electricity and phone ser- vice. In fact, in the United States, combined water and sewer bills average only about 0.5 percent of household income.2 1 Protect Your Drinking Water, 2002. 2 Congressional Budget Office Study: Future Investment in Drinking Water & Wastewater Infrastructure, 2002. Disinfection Byproducts Disinfection of drinking water is one of the major public health advances of the 20th century. However, sometimes the disinfec- tants themselves can react with naturally occurring materials in the water to form unintended byproducts, which may pose health risks. EPA recognizes the importance of removing microbial contaminants while simultaneously protecting the public from disinfection byproducts, and has developed regulations to limit the presence of these byproducts. For more information, see www.epa.gov/safewater/mdbp.html. Water passes through charcoal, sand, and gravel layers in a water system's filtration tank. www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- 4. How Do We Use Drinking Water In Our Homes? We take our water supplies for granted, yet they are limited. Only one percent of all the world's water can be used for drinking. Nearly 97 percent of the world's water is salty or otherwise undrinkable, and the other two percent is locked away in ice caps and glaciers. There is no "new" water: whether our source water is a stream, river, lake, spring, or well, we are using the same water the dinosaurs used mil- lions of years ago. How Much Water Do Homes In The U.S. Use Compared To Other Countries? Americans use much more water each day than indi- viduals in both developed and undeveloped countries: For example, the average European uses 53 gallons; the average Sub-Saharan citizen, 3-5 gallons.4 Common Household Uses of Drinking Water* (*Gal/ons per Capita per Day) Bathing, 20 gpcd Toilet Flushing, 24 gpcd Drinking and Cooking, 2 gpcd Garbage Disposal, 1 gpcd Dishwasher, 4 gpcd Car Washing 2.5 gpcd Lawn Watering and Pools, 25 gpcd Source: Van Dar Leaden, F., F. L. Troise, and D. K. Todd, Ilia Water EncydQBedja., Lewis Publishers, Inc. Second Edition, 1990. The average American uses about 90 gallons of water each day in the home, and each American household uses approximately 107,000 gallons of water each year.1 For the most part, we use water treated to meet drinking water standards to flush toilets, water lawns, and wash dishes, clothes, and cars. In fact, 50-70 percent of home water is used for watering lawns and gardens.2 Nearly 14 percent of the water a typi- cal homeowner pays for is never even used—it leaks down the drain.3 www.epa.gov/safewater Water efficiency plays an impor- tant role in protecting water sourc- es and improving water quality. By using water wisely, we can save money and help the environment. Water efficiency means using less water to provide the same benefit. Using water-saving techniques could save you hundreds of dollars each year, while also reducing the amount of pollutants entering our waterways. How Do Drinking Water Utilities Conserve Water? Water utilities forecast water source availability, growth in population, and water demand to ensure adequate future water supplies during normal conditions, as well as periods of drought. When water shortages are predicted or experienced, water utilities have many options for conserving water. Temporary cutbacks or permanent operating adjustments can help conserve water. Temporary cutbacks may include: • Reduction of system-wide operating pressure, and • Water use bans, restrictions, and rationing. SOW Hotline: 800-426-4791 ------- Permanent conservation measures may include: • Subsidizing use of water-efficient faucets, toilets, and showerheads, • Public education and voluntary use reduction, • Billing practices that impose higher rates for high- er amounts of water use, » Building codes that require water-efficient fixtures and appliances, • Leak detection surveys and meter testing, repair, and replacement, and • Reduction in use and increase in recycling of industrial water. How Can Businesses Conserve Water? The industrial and commercial sectors can con- serve water through recycling and waste reduction. Industry has implemented conservation measures to comply with state and federal water pollution con- trols. Evaluation of industrial plant data may show that a particular process or manufacturing step uses the most water or causes the greatest contamination. Such areas can be targeted for water conservation. Also, water that is contaminated by one process may be usable in other plant processes that do not require high-quality water. How Can i Conserve Water? The national average cost of water is $2.00 per 1,000 gallons. The average American family spends about $474 each year on water and sewage charges.5 American households spend an additional $230 per year on water heating costs.6 By replacing appliances such as the dishwasher and inefficient fixtures such as toilets and showerheads, you can save a substantial amount each year in water, sewage, and energy costs. There are many ways to save water in and around your home. Here are the five that might get the best results: Ways To Save Water At Home* (*Water Savings as Percent of Total Interior Water Use) Low-Flow Showerheads (or Flow Restrictors), 12 percent Low-Water Use Clothes Washers, 5 percent Source: Corbitt, Robert A. Standard Handbook of Environmental Engineering McGraw-Hill, Inc. 1989. Low-Water Use Toilets (or Plastic Bottles or Water Dams in Toilet Reservoir), 18 percent Low-Flow Aerators on Faucets (or Replacement Faucets}, 2 percent Low-Water Use Dishwasher, 4 percent Insulation on Hot Water Lines, 4 percent www.epa.gov/safewater SDW Hotline: 800-426-4791 ------- Stop Leaks. Replace Old Toilets with models that use 1.6 gallons or less per flush. Replace Old Clothes Washers with EPA Energy Star certified models. Plant the Right Kind of Garden that requires less water. Provide Only the Water Plants Need. For more information on ways to conserve water in the home, see www.epa.gov/water/waterefficiency.html or www.h2ouse.org. Water Trivia Facts, EPA 80-F-95-001. AWWA Stats on Tap. Using Water Wisely in the Home, 2002. The Use of Water Today, World Water Council. Investing in America's Water Infrastructure, 2002. Using Water Wisely in the Home, 2002. Nearly 14 percent of the water a typical homeowner pays for is never even used— it leaks down the drain. Using Water Wisely in the Home, 2002 www.apa.gov/safewater SOW Hotline: 800-426-4791 ------- 5. What's Being Done To Improve Water Security? What Security Measures Are In Place To Protect Water Systems? Drinking water utilities today find themselves fac- ing new responsibilities due to concerns over water system security and counter-terrorism. EPA is com- mitted to the safety of public drinking water supplies and has taken numerous steps to work with utilities, other government agencies, and law enforcement to minimize threats. The Public Health Security and Bioterrorism Preparedness and Response Act of 2002 requires that all community water systems serving more than 3,300 people evaluate their susceptibility to potential threats and identify corrective actions. EPA has provided assistance to help utilities with these Vulnerability Assessments by giving direct grants to large systems, supporting self-assessment tools, and providing tech- nical help and training to small and medium utilities. For more information on water system security, see www.epa.gov/safewater/security. How Can I Help Protect My Drinking Water? Local drinking water and wastewater systems may be targets for terrorists and other would-be criminals wishing to disrupt and cause harm to your community water supplies or wastewater facilities. Because utilities are often located in isolated areas, drinking water sources and wastewater collection sys- tems may cover large areas that are difficult to secure and patrol Residents can be educated to notice and report any suspicious activity in and around local water utilities. Any residents interested in protecting their water resources and community as a whole can join together with law enforcement, neighbor- hood watch groups, water suppliers, wastewater operators, and other local public health officials. If you witness suspicious activities, report them to your local law enforcement authorities. Examples of suspicious activity might include: People climbing or cutting a utility fence » People dumping or discharging material to a water reservoir www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Unidentified truck or car parked or loitering near waterway or facilities for no apparent reason Suspicious opening or tampering with manhole covers, fire hydrants, buildings, or equipment People climbing or on top of water tanks People photographing or videotaping utility facilities, structures or equipment Strangers hanging around locks or gates Do not confront strangers. Instead report suspicious activities to local authorities. When reporting an incident: • State the nature of the incident • Identify yourself and your location • Identify location of activity • Describe any vehicle involved (color, make, model, plate number) • Describe the participants (how many, sex, race, color of hair, height, weight, clothing) For emergencies, dial 9-1-1 or other local emergency response numbers. For more information on water security, visit: www.epa.gov/safewater/security Report suspicious activity to local authorities www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- 6. What Can I Do If There Is A Problem With My Drinking Water? Local incidents, such as spills and treatment prob- lems, can lead to short-term needs for alternative water supplies or in-home water treatment. In isolated cases, individuals may need to rely on alternative sources for the long term, due to their individual health needs or problems with obtaining new drinking water supplies. What Alternative Sources Of Water Are Available? Bottled water is sold in supermarkets and conve- nience stores. Some companies lease or sell water dispensers or bubblers and regularly deliver large bottles of water to homes and businesses. It is expen- sive compared to water from a public water system. The bottled water quality varies among brands, because of the variations in the source water used, costs, and company practices. The U.S. Food and Drug Administration (FDA) regu- lates bottled water used for drinking. While most con- sumers assume that bottled water is at least as safe as tap water, there are still potential risks. Although required to meet the same safety standards as public water supplies, bottled water does not undergo the same testing and reporting as water from a treatment facility. Water that is bottled and sold in the same www.epa.gov/safewater state may not be subject to any federal standards at all. Those with compromised immune systems may want to read bottled water labels to make sure more stringent treatments have been used, such as reverse osmosis, distillation, UV radiation, or filtration by an absolute 1 micron filter. Check with NSF International to see if your bottled water adheres to FDA and international drinking water standards. The International Bottled Water Association can also provide information on which brands adhere to even more stringent requirements. Contact information is listed in Appendix C. Can I Do Anything In My House To Improve The Safety Of My Drinking Water? Most people do not need to treat drinking water in their home to make it safe. However, a home water treatment unit can improve water's taste, or provide a factor of safety for those people more vulnerable to waterborne disease. There are different options for home treatment systems. Point-of-use (POU) systems treat water at a single tap. Point-of-entry (POE) systems treat water used throughout the house. POU systems can be installed in various places in the home, including the counter top, the faucet itself, or under the sink. POE systems are installed where the water line enters the house. POU and POE devices are based on various contaminant removal technologies. Filtration, ion exchange, reverse osmosis, and distilla- tion are some of the treatment methods used. All types of units are generally available from retailers, or by mail order. Prices can reach well into the hundreds and sometimes thousands of dollars, and depending on the method and location of installation, plumbing can also add to the cost. SDW Hotline: 800-426-4791 ------- Treatment Device What It Does To Water Treatment Limitations Activated Carbon Filter / Adsorbs organic contaminants that cause taste and odor problems. i/" Some designs remove chlorination byproducts; : V Some types remove cleaning solvents and pesticides Is not efficient in removing metals such as lead and copper Does not remove nitrate, bacteria or dissolved minerals Ion Exchange Unit (with activated alumina) V Removes minerals, particularly calcium and magnesium that make water "hard" V Some designs remove radium and barium / Removes fluoride If water has oxidized iron or iron bacteria, the ion-exchange resin will become coated or clogged and lose its softening ability Reverse Osmosis Unit (with carbon) / Removes nitrates, sodium, other dis- solved inorganics and organic compounds V Removes foul tastes, smells or colors / May also reduce the level of some pesticides, dioxins and chloroform and petrochemicals Does not remove all, inorganic and organic contaminants Distillation Unit / Removes nitrates, bacteria, sodium, hardness, dissolved solids, most organic Compounds, heavy rnetals, and radionuclides : / Kills bacteria Does not remove some volatile organ- ic contaminants, certain pesticides and volatile solvents Bacteria may recolonize on the cool- ing coils during inactive periods Activated carbon filters adsorb organic contami- nants that cause taste and odor problems. Depending on their design, some units can remove chlorination byproducts, some cleaning solvents, and pesticides. To maintain the effectiveness of these units, the car- bon canisters must be replaced periodically. Activated carbon filters are not efficient in removing metals such as lead and copper. Because ion exchange units can be used to remove minerals from your water, particularly calcium and magnesium, they are sold for water softening. Some ion exchange softening units remove radium and bar- ium from water. Ion exchange systems that employ activated alumina are used to remove fluoride and www.apa.gov/safewater arsenate from water. These units must be regenerated periodically with salt. Reverse osmosis treatment units generally remove a more diverse list of contaminants than other systems. They can remove nitrates, sodium, other dissolved inorganics, and organic compounds. Distillation units boil water and condense the result- ing steam to create distilled water. Depending on their design, some of these units may allow vaporized organic contaminants to condense back into the prod- uct water, thus minimizing the removal of organics. You may choose to boil your water to remove micro- bial contaminants. Keep in mind that boiling reduces SDW Hotline: 800-426-4791 ------- the volume of water by about 20 percent, thus con- centrating those contaminants not affected by the temperature of boiling water, such as nitrates and Maintaining Treatment Devices All POU and POE treatment units need main- tenance to operate effectively. If they are not maintained properly, contaminants may accu- mulate in the units and actually make your water worse. In addition, some vendors may make claims about their effectiveness that have no merit. Units are tested for their safety and effectiveness by two organizations, NSF International and Underwriters Laboratory. In addition, the Water Quality Association represents the household, commercial, indus- trial and small community treatment industry and can help you locate a professional that meets their code of ethics. EPA does not test or certify these treatment units. This treatment device is for point of use (POU). For more information on different types of devices contact NSF International, Underwriters Laboratory, or the Water Quality Association See Appendix Cfor contact information. pesticides. For more information on boiling water, see page 5 of this booklet. No one unit can remove everything. Have your water tested by a certified laboratory prior to purchasing any device. Do not rely on the tests conducted by salespeople that want to sell you their product. Where Can I Learn More About Home Treatment Systems? Your local library has articles, such as those found in consumer magazines, on the effectiveness of these devices. The U.S. General Accounting Office published a booklet called Drinking Water: Inadequate Regulation of Home Treatment Units Leaves Consumers At Risk (December 1991). To read this booklet, visit www.gao.gov and search for document number RCED-92-34, or call (202) 512-6000. www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- 7. How Safe Is The Drinking Water In My Household Well? EPA regulates public water systems; it does not have the authority to regulate private wells. Approximately 15 percent of Americans rely on their own pri- vate drinking water supplies (Drinking Waterfront Household Wells, 2002), and these supplies are not subject to EPA standards. Unlike public drinking water systems serving many people, they do not have experts regularly checking the water's source and its quality before it is sent to the tap. These households must take special precautions to ensure the protection and maintenance of their drinking water supplies. Drinking Water from Household Wells is an EPA publication available to specifically address special concerns of a private drinking water supply. To learn more, or to obtain a copy, visit www.epa.gov/safewater/ privatewells, or call the Safe Drinking Water Hotline. How Much Risk Can I Expect? The risk of having problems depends on how good your well is—how well it was built and located, and how well you maintain it. It also depends on your local environment. That includes the quality of the aqui- fer from which your water is drawn and the human activities going on in your area that can affect your well. Several sources of pollution are easy to spot by sight, taste, or smell. However, many serious problems can be found only by testing your water. Knowing the possible threats in your area will help you decide the kind of tests you may need. What Should I Do? There are six basic steps you can take to help protect your private drinking water supply: 1. Identify potential problem sources. 2. Talk with local experts. 3. Have your water tested periodically. 4. Have the test results interpreted and explained clearly. 5. Set and follow a regular maintenance schedule for your well, and keep up-to-date records. 6. Immediately remedy any problems. Identify Potential Problem Sources Understanding and spotting possible pollution sources is the first step to safeguarding your drinking water. If your drinking water comes from a well, you may also have a septic system. Septic systems and other on-site wastewater disposal sys- tems are major potential sources of contamination of private water supplies if they are poorly main- tained or located improperly, or if they are used for disposal of toxic chemicals. Information on septic systems is available from local health departments, state agen- cies, and the National Small Flows Clearinghouse (www.epa.gov/owm/ mab/smcomm/nsfc.htm) at (800) 624-8301. A septic system design manual and guidance on system maintenance are available from EPA (www.epa.gov/ OW-OWM.html/mtb/decent/homeowner.htm}. www.epa.gov/safewater SDW Hotline: 800-426-4791 ------- Talk With Local Experts Ground water conditions vary greatly from place to place, and local experts can give you the best infor- mation about your drinking water supply. Some examples are your health department's "sanitarian," local water-well contractors, public water system officials, county extension agents of the Natural Resources Conservation Service (NRCS), local or county planning commissions, and your local library. Have Your Water Tested Periodically Test your water every year for total coliform bacteria, nitrates, total dissolved solids, and pH levels. If you suspect other contaminants, test for these as well. As the tests can be expensive, limit them to possible problems specific to your situation. Local experts can help you identify these contaminants. You should also test your water after replacing or repairing any part of the system, or if you notice any change in your water's look, taste, or smell. Often, county health departments perform tests for bacteria and nitrates. For other substances, health departments, environmental offices, or county gov- ernments should have a list of state-certified labora- tories. Your State Laboratory Certification Officer can also provide you with this list. Call the Safe Drinking Water Hotline for the name and number of your state's certification officer. Any laboratory you use should be certified to do drinking water testing. Have Your Test Results Interpreted And Explained Clearly Compare your well's test results to federal and state drinking water standards (see Appendix A, or visit www.epa.gov/safewater/mcl.html or call the Safe Drinking Water Hotline). You may need to consult experts to aid you in understanding your results, such as the state agency that licenses water well contrac- tors, your local health department, or your state's drinking water program. Protecting Your Ground Water Supply • Periodically inspect exposed parts of the well for problems such as: - Cracked, corroded, or damaged well casing - Broken or missing well cap - Settling and cracking of surface seals. • Slope the area around the well to drain sur- face runoff away from the well. • Install a well cap or sanitary seal to prevent unauthorized use of, or entry into, the well. • Disinfect drinking water wells at least once per year with bleach or hypochlorite gran- ules, according to the manufacturer's direc- tions. • Have the well tested once a year for coli- form bacteria, nitrates, and other constitu- ents of concern. • Keep accurate records of any well main- tenance, such as disinfection or sediment removal, that may require the use of chem- icals in the well. • Hire a certified well driller for any new well construction, modification, or abandon- ment and closure. • Avoid mixing or using pesticides, fertilizers, herbicides, degreasers, fuels, and other pollutants near the well. • Do not dispose of wastes in dry wells or in abandoned wells. • Do not cut off the well casing below the land surface. • Pump and inspect septic systems as often as recommended by your local health department. • Never dispose of hazardous materials in a septic system. www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Set A Regular Maintenance Schedule For Your Well And Your Septic System Proper well and septic system construction and con- tinued maintenance are keys to the safety of your water supply. Your state water well and septic system contractor licensing agency, local health department, or local public water system professional can provide information on well construction. Make certain your contractors are licensed by the state, if required, or certified by the National Ground Water Association. Maintain your well, fixing problems before they reach crisis levels, and keep up-to-date records of well installation and repairs, as well as plumbing and water costs. Protect your own well area from contamination. Immediately Remedy Any Problems If you find that your well water is con- taminated, fix the problem as soon as possible. Consider connecting into a nearby community water system, if one is available. You may want to install a water treatment device to remove impurities. Information on these devices is provided Animal waste can contaminate your water supply on page 16. If you connect to a public water system, remember to close your well properly. After A Flood-Concerns And Advisories • Stay away from well pump to avoid electric shock. • Do not drink or wash from a flooded well. • Pump the well until water runs clear. • If water does not run clear, contact the county or state health department or extension service for advice. CURB AND CLEAN UP www.epa.gov/safewater SDW Hotline: 800-426-4791 ------- 8. What You Can Do To Protect Your Drinking Water Drinking water protection is a shared responsibility. Many actions are underway to protect our nation's drinking water, and there are many opportunities for citizens to become involved. Be Involved! EPA activities to protect drinking water include set- ting drinking water standards and overseeing the work of states that enforce federal standards—or stricter ones set by the individual state. EPA holds many public meetings on issues ranging from pro- posed drinking water standards to the development of databases. You can also comment on proposed drafts of other upcoming EPA documents. A list of public meetings and regulations open for comment can be found at www.epa.gov/safewater/pubinput/html Be Informed! • Read the annual Consumer Confidence Report provided by your water supplier. Some Consumer Confidence Reports are available at www.epa.gov/ safewater/dwinfo.htm. • Use information from your state's Source Water Assessment to learn about potential threats to your water source. • If you are one of the 15 percent of Americans who uses a private source of drinking water—such as a well, cistern, or spring—find out what activi- ties are taking place in your watershed that may impact your drinking water; talk to local experts/ test your water periodically; and maintain your well properly. • Find out if the Clean Water Act standards for your drinking water source are intended to protect water for drinking, in addition to fishing and swimming. www.epa.gov/safewater Be Observant! • Look around your watershed and look for announcements in the local media about activities that may pollute your drinking water. • Form and operate a citizens watch network with- in your community to communicate regularly with law enforcement, your public water supplier and wastewater operator. Communication is key to a safer community! • Be alert. Get to know your water/wastewater utili- ties, their vehicles, routines and their personnel. • Become aware of your surroundings. This will help you to recognize suspicious activity as opposed to normal daily activities. Other Ways To Get Involved • Attend public hearings on new construc- tion, storm water permitting, and town planning. • Keep your public officials accountable by asking to see their environmental impact statements. • Ask questions about any issue that may affect your water source. • Participate with your government and your water system as they make funding deci- sions. • Volunteer or help recruit volunteers to par- ticipate in your community's contaminant monitoring activities. • Help ensure that local utilities that protect your water have adequate resources to do their job. SOW Hotline: 800-426-4791 ------- If you see any suspicious activities in or around your water supply, please notify local authorities or call 9-1-1 immediately to report the incident. Stormwater runoff threatens our sources of drinking water. As this water washes over roofs, pavement, farms and grassy areas,; it picks up fertilizers, pesticides and litter, and deposits them in surface water and ground water. Here are some other threats to our drinking water: Every year: • We apply 67 million pounds of pesticides that contain toxic and harmful chemicals to our lawns. • We produce more than 230 million tons of municipal solid water—approximately five pounds of trash or garbage par person per day—that contain bacteria, nitrates, virus- es, synthetic detergents, and household chemicals. • Our more than 12 million recreational and houseboats and 10,000 boat marinas release solvents, gasoline, detergents, and raw sewage directly into our rivers, lakes and streams. Don't Contaminate! Reduce paved areas: use permeable surfaces that allow rain to soak through, not run off. • Reduce or eliminate pesticide application: test your soil before applying chemicals, and use plants that require little or no water, pesti- cides, or fertilizers. Reduce the amount of trash you create: reuse and recycle. • Recycle used oil: 1 quart of oil can contaminate 2 million gallons of drinking water—take your used oil and anti- freeze to a service station or recycling center. • Take the bus instead of your car one day a week: you could prevent 33 pounds of carbon dioxide emissions each day. • Keep pollutants away from boat marinas and waterways: keep boat motors well-tuned to prevent leaks, select nontoxic cleaning products and use a drop cloth, and clean and maintain boats away from the water. For more information on how you can help pro- tect your local drinking water source, call the Safe Drinking Water Hotline, or check www.epa.gov/ safewater/publicoutreach. Additional resources are listed in Appendix C. www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Appendix A: National Primary Drinking Water Standards as of 10/03 Acrylamide Nervous system or blood problems; increased risk of cancer Added to water during sewage/ wastewater treatment zero Alachlor 0.002 Eye, liver, kidney or spleen problems; anemia; increased risk of cancer Runoff from herbicide used on row crops zero Alpha particles 15 picocu- ries per Liter fpCi/L) Increased risk of cancer Erosion of natural deposits of certain minerals that are radioactive and may emit a form of radiation known as alpha radiation zero Antimony 0.006 Increase in blood cholesterol; decrease in blood sugar Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder 0.006 Arsenic 0.010 as of 1/23/06 Skin damage or problems with circula- tory systems, and may have increased risk of getting cancer Erosion of natural deposits; runoff from orchards; runoff from glass & electronics production wastes Asbestos {fibers >10 micrometers) 7 million fibers per Liter (MFL) Increased risk of developing benign intestinal polyps Decay of asbestos cement in water mains; erosion of natural deposits 7 MFL Atrazine 0.003 Cardiovascular system or reproductive problems Runoff from herbicide used on row crops 0.003 Barium Increase in blood pressure Discharge of drilling wastes; dis- charge from metal refineries; erosion of natural deposits Benzene 0.005 Anemia; decrease in blood platelets; increased risk of cancer Discharge from factories; leaching from gas storage tanks and landfills zero Benzo(a}pyrene (PAHs) 0.0002 Reproductive difficulties; increased risk of cancer Leaching from linings of water stor- age tanks and distribution lines zero Beryllium 0.004 Intestinal lesions Discharge from metal refineries and coal-burning factories; discharge from electrical, aerospace, and defense industries 0.004 Beta particles and pho- ton emitters 4 millirems per year Increased risk of cancer Decay of natural and man-made deposits of certain minerals that are radioactive and may emit forms of radiation known as photons and beta radiation zero Bromate 0.010 Increased risk of cancer Byproduct of drinking water disinfection zero Cadmium 0.005 Kidney damage Corrosion of galvanized pipes; erosion of natural deposits; discharge from metal refineries; runoff from waste batteries and paints 0.005 Carbofuran 0.04 Problems with blood, nervous system, or reproductive system Leaching of soil fumigant used on rice and alfalfa 0.04 Carbon tetrachloride 0.005 Liver problems; increased risk of cancer Discharge from chemical plants and other industrial activities zero Chloramines {as Cl2) MRDL=4.01 Eye/nose irritation; stomach discomfort; anemia Water additive used to control microbes MRDLG=41 LEGEND 0 Disinfectant Inorganic Chemical Organic Chemical www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- lull lii D D DBF OC IOC IOC M IOC OC OC OC OC •£!•• Bu9 OC OC OC OC OC OC OC OC ^•^^^HW Chlordane _ Chlorine (as Cl2) Chlorine dioxide (as CI02) Chlorite Chlorobenzene Chromium (total) Copper Cryptosporidium Cyanide (as free cyanide) 2,4-D Dalapon 1,2-Dibromo-3- chloropropane (DBCP) o-Dichlorobenzene 1,2-Dichloroethane 1,1-Dichloroethylene cis-1,2-Dichloroethylene trans- 1,2- Dichloroethylene Dichloromethane 1,2-Dichloropropane Di(2-ethylhexyl) adipate Di(2-ethylhexyl) phthalate Dinoseb ^^^m^m 0.002 MRDL=4.Q1 MRDL=0.81 1.0 0.1 0.1 TT7; Action Level = 1.3 TT3 0.2 0.07 0.2 0.0002 0.6 0.075 0.005 0.007 0.07 0.1 0.005 0.005 04 0.006 0.007 ^^^M^HB^^HH^^^BUBBB Liver or nervous system problems; increased risk of cancer Eye/nose irritation; stomach discomfort Anemia; infants & young children: nervous system effects Anemia; infants & young children: nervous system effects Liver or kidney problems Allergic dermatitis Short-term exposure: Gastrointestinal distress. Long-term exposure: Liver or kidney damage. People with Wilson's Disease should consult their personal doctor if the amount of copper in their water exceeds the action level Gastrointestinal illness (e.g., diarrhea, vomiting, cramps) Nerve damage or thyroid problems Kidney, liver, or adrenal gland problems Minor kidney changes Reproductive difficulties; increased risk of cancer Liver, kidney, or circulatory system problems changes in blood Increased risk of cancer Liver problems Liver problems Liver problems Liver problems; increased risk of cancer Increased risk of cancer Weight loss, liver problems, or possible reproductive difficulties Reproductive difficulties; liver problems; increased risk of cancer Reproductive difficulties Residue of banned termiticide Water additive used to control microbes Water additive used to control microbes Byproduct of drinking water disinfection Discharge from chemical and agricul- tural chemical factories Discharge from steel and pulp mills; erosion of natural deposits Corrosion of household plumbing systems; erosion of natural deposits Human and animal fecal waste Discharge from steel/metal factories; discharge from plastic and fertilizer factories Runoff from herbicide used on row crops Runoff from herbicide used on rights of way Runoff/leaching from soil fumigant used on soybeans, cotton, pine- apples, and orchards Discharge from industrial chemical factories factories Discharge from industrial chemical factories Discharge from industrial chemical factories Discharge from industrial chemical factories Discharge from industrial chemical factories Discharge from drug and chemical factories Discharge from industrial chemical factories Discharge from chemical factories Discharge from rubber and chemical factories Runoff from herbicide used on soy- beans and vegetables zero MRDLG=41 MRDLG=0.81 0.8 0.1 0.1 1.3 zero 0.2 0.07 0.2 zero 0.6 0.075 zero 0.007 0.07 0.1 zero zero 0.4 zero 0.007 LEGEND D Dinsinfectant Inorganic Chemical Organic Chemical www.epa.gov/safewater SDVU Hotline: 800-426-4791 ------- Heterotrophic plate count (HPC) LEGEND P Disinfectant Reproductive difficulties; increased risk of cancer Cataracts Stomach and intestinal problems Liver problems Increased cancer risk, and over a long period of time, stomach problems Liver or kidney problems Problems with liver, stomach, reproduc- tive system, or kidneys; increased risk of cancer Bone disease (pain and tenderness of the bones); children may get mottled teeth Gastrointestinal illness {e.g., diarrhea, vomiting, cramps) Kidney problems; reproductive difficulties Increased risk of cancer Liver damage; increased risk of cancer Liver damage; increased risk of cancer HPC has no health effects; it is an analytic method used to measure the variety of bacteria that are common in water. The lower the concentration of bacteria in drinking water, the better maintained the water system is. Liver or kidney problems; reproductive difficulties; increased risk of cancer Kidney or stomach problems Infants and children: Delays in physical or mental development; children could show slight deficits in attention span and learning abilities; Adults: Kidney problems; high blood pressure Legionnaire's Disease, a type of pneumonia Liver or kidney problems Kidney damage Reproductive difficulties Emissions from waste incineration and other combustion; discharge from chemical factories Runoff from herbicide use Runoff from herbicide use Residue of banned insecticide Discharge from industrial chemical factories; an impurity of some water treatment chemicals Discharge from petroleum refineries Discharge from petroleum refineries Water additive which promotes strong teeth; erosion of natural deposits; discharge from fertilizer and aluminum factories Human and animal fecal waste Runoff from herbicide use Byproduct of drinking water disinfection Residue of banned termiticide Breakdown of heptachlor HPC measures a range of bacteria that are naturally present in the environment Discharge from metal refineries and agricultural chemical factories Discharge from chemical factories Corrosion of household plumbing systems; erosion of natural deposits Found naturally in water; multiplies in heating systems Runoff/leaching from insecticide used on cattle, lumber, gardens Erosion of natural deposits; dis- charge from refineries and factories; runoff from landfills and croplands Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock Inorganic Chemical Organic Chemical zero 0.02 0.1 0.002 zero 0.7 zero 4.0 zero 0.7 n/a6 zero zero n/a zero 0.05 zero zero 0.0002 0.002 0.04 www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Infants below the age of six months who drink water containing nitrate in excess of the MCL could become seriously i and, if untreated, may die. Symptoms include shortness of breath and blue- baby syndrome. Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits Nitrate (measured as Nitrogen) Infants below the age of six months who drink water containing nitrite in excess of the MCL could become seriously i and, if untreated, may die. Symptoms include shortness of breath and blue- baby syndrome. Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits Nitrite (measured as Nitrogen) Slight nervous system effects Runoff/leaching from insecticide used on apples, potatoes, and tomatoes Oxamyl (Vydate) Liver or kidney problems; increased cancer risk Discharge from wood-preserving factories Pentachlorophenol Skin changes; thymus gland problems immune deficiencies; reproductive or nervous system difficulties; increased risk of cancer Runoff from landfills; discharge of waste chemicals Polychlorinated biphe nyls (PCBs Increased risk of cancer Radium 226 and Radium 228 (combined) Erosion of natural deposits Hair or fingernail loss; numbness in fin gers or toes; circulatory problems Discharge from petroleum refineries erosion of natural deposits; dis- charge from mines Prob ems with blood Liver, kidney, or circulatory system problems Discharge from rubber and plastic factories; leaching from landfills Liver problems; increased risk of cancer Discharge from factories and dry cleaners Tetrachloroethylene Hair loss; changes in blood; kidney, intestine, or liver problems Leaching from ore-processing sites discharge from electronics, glass, and drug factories Nervous system, kidney, or liver problems Discharge from petroleum factories Not a health threat in itself; it is used to indicate whether other potentially harm- bacteria may be present^ Coliforms are naturally present tn the environment as well as feces; fecal coliforms and E. coli only come from human and animal fecal waste Total Coliforms (includ ing fecal coliform and E. co/A Liver, kidney or central nervous system problems; increased risk of cancer Byproduct of drinking water disinfection Total Trihalomethanes (TTHMs) 0.080 after 12/31/ 03 Kidney, liver, or thyroid problems increased risk of cancer Runoff/leaching from insecticide used on cotton and cattle Residue of banned herbicide 2,4,5-TP Silvex Changes in adrenal glands Discharge from textile finishing factories 1,2,4-Tricnlorobenzene Liver, nervous system, or circulatory problems Discharge from metal degreasmg sites and other factories 1.1.1-mchloroethane LEGEND D Disinfectant Inorganic Chemical Organic Chemical www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Discharge from industrial chemical factories 1,1,2-Tncnloroetnane Liver, kidney, or immune system problems Discharge from metal degreasing sites and other factories mchloroetnylene Liver problems; increased risk of cancer Turbidity is a measure of the cloudiness of water. It is used to indicate water quality and filtration effectiveness (e.g., whether disease-causing organisms are present). Higher turbidity levels are often associated with higher levels of disease-causing microorganisms such as viruses, parasites and some bacteria These organisms can cause symptoms such as nausea, cramps, diarrhea, and associated headaches. Erosion of natural deposits 30 ug/L as of12/ 08/03 Increased risk of cancer, kidney toxicity Leaching from PVC pipes; discharge from plastic factories ncreased risk of cancer Human and animal fecal waste Gastrointestinal illness (e.g., diarrhea vomiting, cramps) Discharge from petroleum factories; discharge from chemical factories Nervous system damage Disinfectant Inorganic Chemical Organic Chemical NOTES 1 Definitions • Maximum Contaminant Level Goal (MCLG)—The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety and are non-enforceable public health goals. • Maximum Contaminant Level (MCL)—The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to MCLGs as feasible using the best available treatment technology and taking cost into consideration, MCLs are enforceable standards. • Maximum Residual Disinfectant Level Goal (MRDLG)—The level of a drink- ing water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants, • Maximum Residual Disinfectant Level (MRDL)—The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfec- tant is necessary for control of microbial contaminants. • Treatment Technique (TT)—A required process intended to reduce the level of a contaminant in drinking water. 2 Units are in milligrams per liter (rng/L) unless otherwise noted. Milligrams per liter are equivalent to parts per million (ppm). 3 EPA's surface water treatment rules require systems using surface water or ground water under the direct influence of surface water to (1) disinfect their water, and (2) fil- ter their water or meet criteria for avoiding filtration so that the following contaminants are controlled at the following levels: • Cryptosporidium (as of 1/1/02 for systems serving >10,000 and 1/14/05 for systems serving <10,000) 99 percent removal. • Giardia lamblia: 99.9 percent removal/inactivation • Viruses: 99.99 percent removal/inactivation • Legionella: No limit, but EPA believes that if Giardia and viruses are removed/ inactivated, Legionella will also be controlled, • Turbidity: At no time can turbidity (cloudiness of water) go above 5 nephelolometric turbidity units (NTU); systems that filter must ensure that the turbidity go no higher than 1 NTU (0.5 NTU for conventional or direct filtration) in at least 95 percent of the daily samples in any month. As of January 1, 2002, for systems servicing >10,000, and January 14, 2005, for systems servicing <10,000, turbidity may never exceed 1 NTU, and must not exceed 0.3 NTU in 95 percent of daily samples in any month. • HPC: No more than 500 bacterial colonies per milliliier • Long Term 1 Enhanced Surface Water Treatment (Effective Date: January 14, 2005); Surface water systems or (GWUDI) systems serving fewer than 10,000 people must comply with the applicable Long Term 1 Enhanced Surface Water Treatment Rule provisions (e.g. turbidity standards, individual filter monitoring, Ctyptosporidium removal requirements, updated watershed control requirements for unfiltered systems), • Filter Backwash Recycling: The Filter Backwash Recycling Rule requires systems that recycle to return specific recycle flows through all processes of the system's existing conventional or direct filtration system or at an alternate location approved by the state. 4 No more than 5.0 percent samples total coliform-positive in a month. (For water sys- tems that collect fewer than 40 routine samples per month, no more than one sample can be total coliform-positive per month.) Every sample that has total coliform must be analyzed for either fecal coliforms or E. colt. If two consecutive TC-positive samples, and one is also positive for E. coli fecal coliforms, system has an acute MCL violation, 5 Fecal coliforrn and £. coli are bacteria whose presence indicates that the water may be contaminated with human or animal wastes. Disease-causing microbes (patho- gens) in these wastes can cause diarrhea, cramps, nausea, headaches, or other symptoms. These pathogens may pose a special health risk for infants, young chil- dren, and people with severely compromised immune systems. 6 Although there is no collective MCLG for this contaminant group, there are individual MCLGs for some of the individual contaminants: • Haloacetic acids: dichloroacetic acid (zero); trichloroacetic acid (0,3 mg/L) • Tri ha lorn ethanes: bromodichloromethane (zero); bromoform (zero); dibromochloro- methane (0.06 mg/L) 7 Lead and copper are regulated by a Treatment Technique that requires systems to control the corrosiveness of their water. If more than 10 percent of tap water samples exceed the action level, water systems must take additional steps. For copper, the action level is 1.3 mg/L, and for lead is 0.015 rng/L 8 Each water system must certify, in writing, to the state (using third-party or manufac- turers certification) that when it uses acrylamide and/or epichlorohydrin to treat water, the combination (or product) of dose and monomer level does not exceed the levels specified, as follows: Acrylamide = 0.05 percent dosed at 1 mg/L (or equivalent); Epichlorohydrin - 0.01 percent dosed at 20 mg/L (or equivalent). www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Appendix B: References US EPA Publications 25 Years of the Safe Drinking Water Act: History B Trends EPA816-R-99-007 December 1999 Community Water Systems Survey 2000, Volume I EPA815-R-02-0054 December 2002 Drinking Water Costs and Federal Funding EPA810-F-99-014 December 1999 Drinking Water from Household Weils EPA816-K-02-003 January 2002 Drinking Water Priority Rulemaking: Microbial and Disinfection Byproduct Rules EPA816-F-01-012 June 2001 Drinking Water Treatment EPA810-F-99-013 December 1999 Factoids: Drinking Water and Ground Water Statistics for 2001 EPA815-K-02-004 May 2002 Factoids: Drinking Water and Ground Water Statistics for 2002 EPA816-K-03-001 January 2003 Fact Sheet: 1999 Drinking Water Infrastructure Needs Survey EPA816-F-01-001 February 2001 "Investing in America's Water Infrastructure" Keynote Address by G. Tracy Mehan III to the Schwab Capital Markets' Global Water Conference April 2003 Protect Your Drinking Water EPA816-F-02-012 September 2002 Public Access to Information & Public Involvement EPA810-F-99-021 December 1999 Report to Congress: EPA Studies on Sensitive Subpopulations and Drinking Water Contaminants EPA815-R-00-015 December 2000 Safe Drinking Water Act- Protecting America's Public Health EPA816-H-02-003 January 2002 Safe Drinking Water Act: Underground Injection Control Program: Protecting Public Health and Drinking Water Resources EPA816-H-01-003 August 2001 The Clean Water and Drinking Water Infrastructure Gap Analysis EPA816-F-02-017 September 2002 The Drinking Water State Revolving Fund: Protecting the Public Through Drinking Water Infrastructure Improvements EPA819-F-00-028 November 2001 Understanding the Safe Drinking Water Act EPA810-F-99-008 December 1999 Using Water Wisely in the Home EPA800-F-02-001 June 2001 Publications From Outside Sources Centers for Disease Control and Prevention. Morbidity and Mortality Weekly Report: Surveillance for Waterborne- Disease Outbreaks-United States-1999-2000. November 22, 2002 Congressional Budget Office. Future Investment in Drinking Water & Wastewater Infrastructure November 2002 www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Appendix C: Sources of Additional Information American Water Works Association Public Affairs Department 6666 West Quincy Avenue Denver, CO 80235 Phone (303) 794-7711 www,awwa. org Association of Metropolitan Water Agencies 1717 K Street NW Suite 1102 Washington, DC 20036 Phone (202) 331-2820 www.amwa-water.org Association of State Drinking Water Administrators 1120 Connecticut Avenue NW Suite 1060 Washington, DC 20036 Phone (202) 293-7655 www.asdwa.org Clean Water Action 4455 Connecticut Avenue NW Suite A300 Washington, DC 20008 Phone (202) 895-0420 www.cleanwater.org Consumer Federation of America 1424 16th Street NW Suite 604 Washington, DC 20036 Phone (202) 387-6121 www. consumerfed. org The Groundwater Foundation P.O. Box 22558 Lincoln, NE 68542 Phone (800) 858-4844 www.groundwater. org The Ground Water Protection Council 13308 N. Mac Arthur OKC, OK 73142 Phone (405) 516-4972 www.gwpc.org www.epa.gov/safewater International Bottled Water Association 1700 Diagonal Road Suite 650 Alexandria, VA 22314 Phone (703) 683-5213 Information Hotline 1-800-WATER-11 ibwainfo(5)bottledwater.org National Association of Regulatory Utility Commissioners Phone (202) 898-2200 www.naruc.org National Association of Water Companies 1725 K Street NW Suite 1212 Washington, DC 20006 Phone (202) 833-8383 www.nawc.org National Drinking Water Clearinghouse West Virginia University P.O. Box 6064 Morgantown, WV 26506 Phone (800) 624-8301 www.ndwc. wvu. edu National Rural Water Association 2915 South 13th Street Duncan, OK 73533 Phone (580) 252-0629 www.nrwa.org Natural Resources Defense Council 40 West 20th Street New York, NY 10011 Phone (212) 727-2700 www.nrdc.org NSF International P.O. Box 130140 789 North Dixboro Road Ann Arbor, Ml 48113 Phone (800) NSF-MARK www.nsf.org SOW Hotline: 800-426-4791 ------- Rural Community Assistance Program 1522 K Street NW Suite 400 Washington, DC 20005 Phone (202) 408-1273 www.rcao.ora Underwriters Laboratories Corporate Headquarters 333 Pflngsten Road Northbrook, IL 60062-2096 Phone (877) 272-8800 www. ul. com Water Quality Association 4151 Naperville Road Lisle, IL 60532 Phone (630) 505-0160 www.wqa.org U.S. Environmental Protection Agency Water Resource Center 1200 Pennsylvania Avenue NW RC-4100 Washington, DC 20460 SDWA Hotline (800) 426-4791 www.epa.aov/safewater Water Systems Council National Programs Office 101 30th Street NW Suite 500 Washington, D.C. 20007 Phone: (202) 625-4387 Wellcare Hotline 888-395-1033 www.watersvstems council.ora EPA Region 1 (CT, ME, MA, NH, Rl, VT) Phone (617) 918-1111 Phone (617) 918-1614 (UIC issues) EPA Region 2 (NJ, NY, PR, VI) Phone (212) 637-5000 Phone (212) 637-4232 (UIC issues) EPA Region 3 (DE, DC, MD, PA, VA, WV) Phone (215) 814-5700 Phone (215) 814-5445 {UIC issues) EPA Region 4 (AL, FL, GA, KY, MS, NC, SC, TN) Phone (404) 562-9900 Phone (404) 562-9452 {UIC issues) EPA Region 5 (IL, IN, Ml, MN, OH,WI) Phone (312) 886-2000 Phone (312) 886-1492 (UIC issues) EPA Region 6 (AR, LA, NM, OK,TX) Phone (214) 665-6444 Phone (214) 665-7183 (UIC issues) EPA Region 7 (IA, KS, MO, NE) Phone (913) 551-7003 Phone (913) 551-7030 (UIC issues) EPA Region 8 (CO, MT, ND, SD, UT, WY) Phone (303) 312-6312 Phone (303) 312-6242 (UIC issues) EPA Region 9 (AZ, CA, HI, NW, AS GU) Phone (415) 947-8000 Phone (415) 947-1834 (UIC issues) EPA Region 10 (AK, ID, OR, WA) Phone (206) 553-1200 Phone (206) 553-1901 (UIC issues) www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Appendix D: Glossary Aquifer A natural underground layer, often of sand or gravel, that contains water Coliform A group of related bacteria whose presence in drinking water may indicate contamination by disease-causing microorganisms Community Water System (CWS) A water system that supplies drinking water to 25 people or more year-round in their residences Contaminant Anything found in water (including microorgan- isms, radionuclides, chemicals, minerals, etc.) which may be harmful to human health Cryptosporidium Microorganism found commonly in lakes and rivers which is highly resistant to disinfection. Disinfectant A chemical (commonly chlorine, chloramines, or ozone) or physical process (e.g., ultraviolet light) that kills microorganisms such as viruses, bacteria, and protozoa Distribution System A network of pipes leading from a treatment plant to customers' plumbing systems Ground Water Water that is pumped and treated from an aquifer Inorganic Contaminants Mineral-based compounds such as metals, nitrates, and asbestos; naturally occurring in some water, but can also enter water through human activities Maximum Contaminant Level The highest level of a contaminant that EPA allows in drinking water (legally enforceable standard) Maximum Contaminant Level Goal The level of a contaminant at which there would be no risk to human health (not a legally enforceable standard) Microorganisms Tiny living organisms that can be seen only under a microscope; some can cause acute health prob- lems when consumed in drinking water Non-Transient Non-Community Water System A non-community water system that serves the same people more than six months of the year, but not year-round Organic Contaminants Carbon-based chemicals, such as solvents and pes- ticides, which enter water through cropland runoff or discharge from factories Pathogen Disease-causing organism Public Water System (PWS) A water system which supplies drinking water to at least 25 people, at least 60 days each year www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- Sensitive Subpopulation People who may be more vulnerable to drinking water contamination, such as infants, children, some elderly, and people with severely compro- mised immune systems Septic System Used to treat sanitary waste; can be a significant threat to water quality due to leaks or runoff Source Water Water in its natural state, prior to any treatment for drinking (i.e., lakes, streams, ground water) Surface Water Water that is pumped and treated from sources open to the atmosphere, such as rivers, lakes, and reservoirs Transient Non-Community Water System A non-community water system that serves the public but not the same individuals for more than six months Violation Failure to meet any state or federal drinking water regulation Vulnerability Assessment An evaluation of drinking water source quality and its vulnerability to contamination by pathogens and toxic chemicals Watershed The land area from which water drains into a stream, river, or reservoir Well A bored, drilled or driven shaft whose depth is greater than the largest surface dimension, a dug hole whose depth is greater than the largest surface dimension, an improved sinkhole, or a sub- surface fluid distribution system www.epa.gov/safewater SOW Hotline: 800-426-4791 ------- |