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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in the United States

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14,626 inventory records · HydroWASTE v1.0 / United States

Data years: 2008, 2012. The inventory date does not establish current operation.

States

14,626 results

CompareNameNative sizeYear
SUMNER WWTPHW:290702,078 population served2012
KAHOKA WWTPHW:322542,078 population served2012
BELCOURT LAGOONHW:347202,078 population served2012
SHENANDOAH WPCPHW:271922,077 population served2012
LUDOWICI WPCPHW:272412,077 population served2012
Arcanum WWTP and SewersHW:348822,076 population served2012
Fisherman Bay STPHW:387662,076 population served2012
ST CHARLES STPHW:309922,075 population served2012
Clyde V WWTPHW:340182,075 population served2012
SKIATOOK BIRD CREEK WWTHW:356792,075 population served2012
GREENFIELD WWTPHW:287202,074 population served2012
Merrimac Dept of Public WorksHW:307732,074 population served2012
Attica WWTP and SewersHW:349402,074 population served2012
Eureka Springs WWTPHW:254982,073 population served2012
GLENVILLE WWTPHW:388412,073 population served2012
BRUNDIDGE WWTPHW:251372,070 population served2012
SO BERWICK SEWAGE PLANTHW:304972,070 population served2012
BUTLER WPCPHW:271522,069 population served2012
MOUNTAIN TOP CLARENCE STPHW:369762,069 population served2012
Montour Falls V STPHW:340062,067 population served2012
La Villa WWTPHW:376302,066 population served2012
CARRINGTON LAGOONHW:345412,065 population served2012
GRANITE PWA WWTHW:358182,065 population served2012
SENECA WWTPHW:295382,064 population served2012
ROME CITY WWTPHW:283312,060 population served2012
PARSONS STPHW:374842,060 population served2012
FT PIERRE WWTPHW:372912,059 population served2012
BAYOU LA BATRE WWTPHW:249902,058 population served2012
BOURBON WWTPHW:323972,058 population served2012
HENNESSEY WWTHW:358592,058 population served2012
CHARLEVOIX STPHW:311722,057 population served2012
CLYMER BORO STPHW:367782,056 population served2012
NEW PALESTINE WWTPHW:279892,055 population served2012
East Leflore County WandS DistrictHW:314022,055 population served2012
Dutchess Co Dalton Farms WWTPHW:335832,055 population served2012
DEERFIELD STPHW:391802,053 population served2012
MATEWAN WWTPHW:389382,052 population served2012
KREBS UA WWTHW:359542,051 population served2012
PORTOLA WWTFHW:259812,050 population served2012
SLATER WWTPHW:319952,050 population served2012
Suffolk Co SCSD20EWFloyd WWTPHW:335492,050 population served2012
St Johnsville V STPHW:337402,050 population served2012
AVILLA WWTPHW:282082,049 population served2012
EAST HELENA WWTPHW:325572,047 population served2012
Coal Grove WWTP and Sewer SystemHW:350542,047 population served2012
BRIDGEPORT LAGOONHW:251352,046 population served2012
MINNEAPOLIS WWTPHW:296882,046 population served2012
Dolgeville V WWTPHW:338312,046 population served2012
CLIFTON LagoonHW:373472,046 population served2012
OAKLEY WWTPHW:296492,045 population served2012
WHITESBURG STPHW:300572,043 population served2012
WAYLAND STPHW:311692,043 population served2012
MADISON WWTPHW:330582,043 population served2012
Manchester WWTP and Sewer SystemHW:352532,043 population served2012
CANAAN WWTPHW:382992,042 population served2012
LONDON WWTFHW:261332,041 population served2012
FOUNTAIN CITY WWTPHW:281332,041 population served2012
WOODLAND WWTFHW:304022,041 population served2012
GLEN ROCK SEW AUTHHW:365582,041 population served2012
Claypool Hill_Wardell WWTPHW:383082,039 population served2012
Austin WWTPHW:256702,038 population served2012
SPRUCE PINE WWTPHW:343142,038 population served2012
FLORA WWTPHW:282162,036 population served2012
DENMARK WWTPHW:391852,036 population served2012
Montgomery Township Cherry Valley CS_STPHW:333152,035 population served2012
ELGIN STPHW:361182,035 population served2012
CLEGHORN WWTFHW:261752,030 population served2012
PINEDALE LAGOONHW:397142,030 population served2012
PLAINVILLE WWTPHW:296182,029 population served2012
BLOWING ROCK WWTPHW:344242,028 population served2012
Arcade V WWTPHW:341072,026 population served2012
GREENSBORO SOUTH WPCPHW:272162,025 population served2012
WEST COLLEGE CORNER WWTPHW:281262,023 population served2012
OGDEN STPHW:291862,023 population served2012
PATTON BORO STPHW:366452,023 population served2012
City of WESTPORT WW Treatment_SewerHW:386782,022 population served2012
HAUBSTADT WWTPHW:280972,021 population served2012
SCHUYLKILL CO MA GORDON BOROHW:363492,021 population served2012
CAMDEN SOUTH WWTPHW:251392,020 population served2012
CAMDEN NORTH WWTPHW:251402,020 population served2012
Judsonia WWTPHW:257592,019 population served2012
W GLENDIVE STPHW:325892,016 population served2012
Buckeye Festival Ranch WRFHW:253032,014 population served2012
MARLETTE STPHW:309502,014 population served2012
NETTLETON POTWHW:315532,013 population served2012
TEKAMAH WWTPHW:330522,012 population served2012
N Lake Rec Sewer and Water DistrictHW:274522,011 population served2012
BUNNELL WWTPHW:269122,010 population served2012
ANDREWS WWTPHW:282752,010 population served2012
TOWNSEND LAGOONHW:324912,010 population served2012
Suffolk Co SCSD 12 Birchwood_HolebrookHW:335512,010 population served2012
CEDAR GROVE STPHW:391482,010 population served2012
HAMPTON WPCPHW:272202,009 population served2012
KINGSLAND WPCPHW:272352,009 population served2012
GRANVILLE STPHW:279082,009 population served2012
Swedesboro Borough CS Septics_ STPHW:333542,008 population served2012
Cooperstown V Sewers and STPHW:337462,007 population served2012
HASKELL PWA WWTHW:359162,007 population served2012
Northern Tazewell Co WWTPHW:385102,007 population served2012
WASILLA WWTPHW:252662,005 population served2012

Regulatory context

General reference. This is not an exhaustive review of applicable law.

United States: Clean Water Act / NPDES

NPDES regulates pollutant discharges from point sources to waters of the United States. The permit sets limits and monitoring conditions. A CWNS code identifies an inventory record, not an NPDES permit.

  • Permit identifier and permitting authority: EPA or an authorized state.
  • Outfall and receiving water; sewer connections follow a different control route.
  • Current permit conditions, limits and dated measurements; these are not included in CWNS.

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.