dean Watersheds Needs Survey 2004 The Clean Watersheds Needs Survey (CWNS) is a comprehensive assessment of needs1 to meet the water quality and water-related public health goals of the Clean Water Act (CWA). States and the U.S. Environmental Protection Agency (EPA) conduct the CWNS every four years under CWA Sections 205(a) and 516 (b)(l). Delaware reported needs totaling $0.1 billion in 2004. This is a fifty-eight percent decrease from the $0.3 billion in needs reported in 2000. County Needs ($M) None reported <25 25-50 >50 Facility Needs ($M) • <25 o 25-75 © >75 Reported Needs in Delaware Type of Need Wastewater treatment plant improvements Wastewater collection and conveyance improvements Combined sewer overflow correction Stormwater management controls Home sewage treatment system improvements Recycled wastewater distribution" Total Wastewater Treatment Needs Agriculture best management practices (BMPs) Forestry BMPs Residential/ business development BMPs Ground water protection BMPs Marinas and boating BMPs Mining and quarrying BMPs Contaminated industrial site (Brownfield) remediation Leaking storage tank remediation Sanitary landfill BMPs Water resource restoration and protection Total Nonpoint Source Pollution Control Needs | Total Needs a The CWNS did not collect data on recycled water distribution in 2000 Needs (2004 Dollars, 2000 $63 $143 $113 nrb n/a n/a $319 nr nr nr nr nr nr nr nr nr nr nr $319 b Not reported Millions) 2004 $62 $51 $21 nr nr nr $134 nr nr nr nr nr nr nr nr nr nr nr $134 Percent Change -2% -64% -81% n/a n/a n/a -58% n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a -58% 1 Costs in the CWNS are generally eligible for funding under the Clean Water Act State Revolving Fund (CWSRF). All needs are capital needs except stormwater management needs, which include program development costs. The survey is a "snapshot" of data and needs; needs are as of January 1, 2004, and all costs are in January 2004 dollars. ------- dean Watersheds Needs Survey 2004 The enactment of the Clean Water Act (CWA) in 1972 resulted in dramatic improvements in the: • Number of wastewater treatment plants. • Percentage of the population served by wastewater treatment plants. • Level of effluent treatment from wastewater treatment plants. In 2004, 84% of Delaware residents received centralized wastewater treatment services at the secondary, greater than secondary, or no discharge treatment level, compared to 17% in 1972. Number of Centralized Treatment Facilities and Population Served Treatment Level Number of Facilities 1972 2004 Projected" 1972 Population Served % Total % Total Population Population 1972 2004 2004" Projected3 Less than Secondary Secondary Greater than Secondary No Discharge ^^^M ^ 6 9 9 0 mm 0 2 13 4 19 0 2 12 5 15,000 8,000 88,000 0 19 111,000 2.6% 1.4% 15.2% 0% 19.2% 0 8,822 666,349 25,444 700,615 0% 1.1% 80.2% 3.1% 84.4% 0 11,165 796,144 39,024 846,333 a Number of facilities and population served if all needs documented in the CWNS 2004 are met. b The remaining population is largely served by home and cluster sewage treatment systems. (Number of facilities from Tables C-7 and C-8 of the CWNS 2004 Report to Congress) What are treatment levels? • Less than secondary treatment removes solids by filtration, sedimentation, and chemical coagulation. • Secondary treatment removes most of the organic matter in wastewater using biological processes. • Greater than secondary treatment removes additional organic matter, nitrogen, phosphorus, or toxics. • No discharge facilities include facilities that reuse wastewater, discharge to an underground aquifer, or dispose of wastewater via methods such as irrigation or evaporation. The CWA goals of fishable, swimmable and drinkable waters require secondary or greater treatment. Small communities often need additional assistance to meet CWA requirements, because they often lack adequate financing, training, and economies of scale to efficiently manage and maintain wastewater treatment systems. In Delaware, small community wastewater facilities serve 11% of the population and comprise 38% of total wastewater treatment and collection needs. EPA small community support information is available at: www. epa. gov/owm/mab/smcomm Reported Needs for Facilities in Small Communities Population Facilities 2000 2004 < 1,000 1,000-3,499 3,500-10,000 Needs (2004 Dollars, Millions) 2000 2004 $24 $28 $35 $6 $16 $29 Detailed Reports to Congress Other state fact sheets Maps, charts, and data downloads for watersheds, counties, congressional districts, states, and regions Office of Water, Office of Wastewater Management; 1200 Pennsylvania Ave., N.W. (Mailcode 4204M), Washington, DC 20460 EPA-XXX-X-XX-XXX; Month XX, 2007 ------- |