Hawaii Clean Watersheds Needs Survey 2008 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 Section 516 (b). Hawaii documented needs totaling $1.8 billion in 2008. This is a 29 percent decrease from the $2.5 billion in needs documented in 2004. Documented Needs in Hawaii Needs (2008 Dollars, Millions) Type of Need 2004 2008 Percent Change Wastewater treatment $821 $340 -59% Pipe repair and new pipes $1,516 $1,215 -20% Recycled water distribution $134 $202 51% Combined sewer overflow correction $0 $0 0% Total Wastewater Treatment Needs $2,471 $1,757 -29% Conveyance infrastructure n/a nra n/a Treatment systems n/a nr n/a Green infrastructure n/a nr n/a General stormwater management nr nr 0% Total Stormwater Management Needsb nr nr 0% Agriculture (cropland) best management practices (BMPs) nr nr 0% Agriculture (animals) BMPs nr nr 0% Silviculture (forestry) BMPs nr nr 0% Ground water protection: unknown source BMPs nr nr 0% Marinas BMPs nr nr 0% Resource extraction BMPs nr nr 0% Brownfields remediation nr nr 0% Storage tank remediation nr nr 0% Sanitary landfills BMPs nr nr 0% Hydromodification (Water resource restoration and protection) nr nr 0% Other estuary management activities0 n/a nr n/a Total Nonpoint Source Control Needsb'd nr nr 0% Total Decentralized Wastewater Treatment Needsb'd nr $2 n/a Total Needs $2,471 $1,759 -29% aNot reported; bActual needs may be higher, since documenting these needs is difficult; cIn 2004, Other Estuary Management Needs were reported under Separate State Estimates (SSEs); dNot included in Official Needs in the Report to Congress. * County Needs ($M) None reported ~ < 100 100-150 ¦¦ > 150 1 Documented needs in the CWNS include the unfunded capital costs of projects as of January 1, 2008 that address a water quality or a water quality-related public health problem existing as of January 1, 2008, or expected to occur within the next 20 years; and meet the seven CWNS documentation criteria. All needs are in January 2008 dollars. ------- Hawaii Clean Watersheds Needs Survey 2008 Wastewater Treatment Facilities 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. • Quality of effluent treatment from wastewater treatment facilities. In 2008, 37% of Hawaii residents received centralized wastewater treatment services at the secondary, advanced, or no discharge treatment level, compared to 6% in 1972. Number of Centralized Treatment Facilities and Population Served Number of Facilities Population Served %Total %Total Population Population Treatment Level 1972 2008 Projected" 1972 1972 2008 2008 Projected3 Less than Secondary 7 1 1 57,000 7 344,706 27 420,000 Secondary 10 6 6 23,000 3 344,011 27 561,300 Advanced 11 1 1 30,000 4 279 <1 17,258 No Discharge 0 14 16 0 0 128,860 10 239,179 Total 28 22 24 110,000 13 817,856 64 1,237,737 a Number of facilities and population served if all needs documented in the CWNS 2008 are met. Small Communities In Hawaii, small community wastewater facilities serve 3% of the population and comprise 3% 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 Facilities Population 2004 2008 Needs (2008 Dollars, Millions) 2004 2008 0-999 0 1 1,000-3,499 2 3 3,500-10,000 4 1 $0 $8 $8 $21 $39 $19 Total 6 : $49 $48 Visit www.epa.gov/cwns for more information including: • Detailed Reports to Congress • Other state fact sheets • Maps, charts, and data downloads for projects, facilities, watersheds, counties, congressional districts, cities, states, and regions ------- |