United States Environmental Protection Agency The Fourth Unregulated Contaminant Monitoring Rule (UCMR 4) Metals, Pesticides, Alcohols, SVOCs - Fact Sheet for Assessment Monitoring Overview EPA published the "Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 4) for Public Water Systems and Announcement of Public Meeting" on December 20, 2016 (81 FR 92666). UCMR 4 includes Assessment Monitoring for a total of 30 chemical contaminants including two metals, eight pesticides plus one pesticide manufacturing byproduct, three alcohols, and three semivolatile organic chemicals (SVOCs), as shown in the table below. UCMR 4 also requires Assessment Monitoring for: • Three brominated haloacetic acid (HAA) disinfection byproducts groups and the indicators total organic carbon (TOC) and bromide. • Nine cyanotoxins and one cyanotoxin group. Monitoring under UCMR 4 will occur from 2018-2020. For more information on these contaminants, please refer to the respective UCMR 4 Fact Sheets. Assessment Monitoring (Metals, Pesticides, Alcohols, SVOCs) Metals: EPA Method 200.8, ASTM D5673-10, SM 31253 Contaminant CASRN1 MRL2 (Hg/L) Additional Information germanium 7440-56-4 0.3 Naturally-occurring element; commercially available in combination with other elements and minerals; a byproduct of zinc ore processing; used in infrared optics, fiber-optic systems, electronics and solar applications manganese 7439-96-5 0.4 Naturally-occurring element; commercially available in combination with other elements and minerals; used in steel production, fertilizer, batteries and fireworks; drinking water and wastewater treatment chemical; essential nutrient Pesticides and a Pesticide Manufacturing Byproduct: EPA Method 525.3 Contaminant CASRN1 MRL2 (Hg/L) Additional Information alpha-hexachlorocyclohexane 319-84-6 0.01 Component of benzene hexachloride (BHC); formerly used as an insecticide chlorpyrifos 2921-88-2 0.03 Organophosphate; used as an insecticide, acaricide and miticide dimethipin 55290-64-7 0.2 Used as an herbicide and plant growth regulator ethoprop 13194-48-4 0.03 Used as an insecticide oxyfluorfen 42874-03-3 0.05 Used as an herbicide profenofos 41198-08-7 0.3 Used as an insecticide and acaricide tebuconazole 107534-96-3 0.2 Used as a fungicide total permethrin (cis- & trans-) 52645-53-1 0.04 Used as an insecticide tribufos 78-48-8 0.07 Used as an insecticide and cotton defoliant Alcohols: EPA Method 541 Contaminant CASRN1 MRL2 (Hg/L) Additional Information l-butanol 71-36-3 2.0 Used as a solvent, food additive and in production of other chemicals 2-methoxyethanol 109-86-4 0.4 Used in a number of consumer products, such as synthetic cosmetics, perfumes, fragrances, hair preparations and skin lotions 2-propen-l-ol 107-18-6 0.5 Used in the production flavorings, perfumes and other chemicals Office of Water (MS-140) EPA 815-F-16-009 December 2016 ------- Semivolatile Chemicals: EPA Method 530 Contaminant CASRN1 MRL2 (Hg/L) Additional Information butylated hydroxyanisole 25013-16-5 0.03 Used as a food additive (antioxidant) o-toluidine 95-53-4 0.007 Used in the production of dyes, rubber, pharmaceuticals and pesticides quinoline 91-22-5 0.02 Used as a pharmaceutical (anti-malarial) and flavoring agent; produced as a chemical intermediate; component of coal 1. CASRN - Chemical Abstracts Service Registry Number 2. MRL - Minimum Reporting Level 3. ASTM - ASTM International; SM - Standard Methods ¦ Applicable Water Systems: Community water systems (CWSs) and non-transient non-community water systems (NTNCWSs) serving more than 10,000 retail customers (i.e., large systems) and a representative sample of 800 CWSs and NTNCWSs serving 10,000 or fewer retail customers (i.e., small systems). ¦ Timeframe and Frequency: For surface water and ground water under the direct influence of surface water systems, sampling will take place for four consecutive quarters over the course of 12 months; a total of four sampling events that occur three months apart. For ground water systems, sampling will take place twice over the course of 12 months; a total of two sampling events that occur five to seven months apart. ¦ Monitoring Locations: Sample collection will take place at the entry point to the distribution system (EPTDS). With prior approval, large ground water systems that have multiple EPTDSs can sample at representative sampling locations rather than at each EPTDS. Systems that purchase water with multiple connections from the same wholesaler may select one representative connection from that wholesaler. This EPTDS sampling location must be representative of the highest annual volume connections. ¦ Laboratories: Samples must be analyzed by EPA UCMR approved laboratories. ¦ Occurrence Data: The analytical results from UCMR 4 are stored in the National Contaminant Occurrence Database (NCOD). For a summary of the NCOD results, tips for querying NCOD, and health effects information (including reference concentrations, where available), please refer to the UCMR 4 Data Summary document. Critical Deadlines and Requirements Following Rule Publication Due Date Requirement Report through SDWARS1 Contact Sampling Coordinator2 December 31, 2017 Large systems must update contact information, zip code(s), sampling location(s), inventory information and monitoring schedule. With the exception of monitoring schedule changes, any subsequent changes must be submitted within 30 days of the change occurring. EPA will coordinate with the small systems to collect the contact information, zip code(s) and inventory information. After December 31, 2017, systems must provide an explanation for any requested schedule change and obtain EPA approval of the change. X X (after December 31, 2017) February 21, 2017 Laboratories seeking approval must submit a registration form to participate in the laboratory approval process. X April 19, 2017 Laboratories must complete and submit the necessary laboratory approval application materials. X October 31, 2017 Large ground water systems that wish to monitor from representative EPTDSs must submit their plan previously approved by EPA or a state (i.e., under a prior UCMR cycle) or a proposal for a new representative sampling plan. Note: the original deadline of April 19, 2017 was extended to provide greater opportunities for PWSs to reduce their monitoring. X Page 2 of 3 ------- Following Sample Collection Due Date Requirement Report through SDWARS1 Contact Sampling Coordinator2 Within 120 days of sample collection Laboratories post data to SDWARS. X Within 60 days of lab posting data PWSs review and approve the data. If the PWS has not taken action after 60 days, the data are considered approved and ready for state and EPA review. X 1. Safe Drinking Water Accession and Review System. 2. Contact via email at UCMR Sampling Coordinator(5)epa.gov. Data Elements EPA will collect the following data elements in SDWARS4, an updated version of the data reporting system used in previous UCMR actions. Public Water System Identification (PWSID) Code Sampling Point Identification Code Sample Collection Date Analysis Batch Identification Code Laboratory Identification Code Public Water System Name Sampling Point Name Sample Identification Code Analysis Date Sample Event Code Public Water System Facility Identification Code Sampling Point Type Code Contaminant Sample Analysis Type Public Water System Facility Name Disinfectant Type Analytical Method Code Analytical Results-Sign Public Water System Facility Type Treatment Information Extraction Batch Identification Code Analytical Result- Measured Value Water Source Type Disinfectant Residual Type Extraction Date Additional Value Additional Information The Public Notification Rule (40 CFR 141.207) requires PWSs to notify the persons served of the availability of the results no later than 12-months after monitoring results are known. CWSs may include their public notice within their Consumer Confidence Reports (CCRs). Under the Consumer Confidence Report (CCR) Rule (40 CFR 141.153(d)) requires CWSs to report the monitoring results whenever unregulated contaminants are detected. CCRs are to be sent to all billing customers each year by July 1. (The CCR Rule does not apply to non-community water systems). To obtain a copy of your CCR, you should contact your water supplier or you may find information for how to obtain a copy of the CCR in your water bill. Additional information about the CCR including detains on reporting requirements can be found on the CCR Homepage. For More Information ¦ Safe Drinking Water Hotline: 1-800-426-4791 ¦ CDX/SDWARS Help Desk: 1-888-890-1995 ¦ UCMR Homepage Page 3 of 3 ------- |