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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
CHARLES TOWN WILLOW SPRING WWTPHW:388771,006 population served2012
DEERFIELD ARGENTINE WWTPHW:311921,005 population served2012
PLEASANTVILLE BORO STPHW:368771,005 population served2012
PLAINFIELD WWTFHW:382621,005 population served2012
GILMAN STPHW:392331,005 population served2012
EMERSON WPCPHW:271981,004 population served2012
SENOIA LASHW:272881,004 population served2012
SATANTA WWTPHW:293441,003 population served2012
MAYSVILLE WWTPHW:321571,002 population served2012
WISHEK LAGOONHW:347111,002 population served2012
Williamsport WWTP and Sewer SystemHW:355091,002 population served2012
WISTER WWTHW:356281,002 population served2012
LYNDON WWTPHW:294901,001 population served2012
UNIONTOWN WWTPHW:252241,000 population served2012
BEAR VALLEY WWTFHW:260521,000 population served2012
Placer County WWTF 3HW:260871,000 population served2012
WALDEN WWTPHW:263401,000 population served2012
DOLORES WWTPHW:264011,000 population served2012
Clearwater MDHW:265081,000 population served2012
South Fork WSDHW:265091,000 population served2012
BALDWIN WWTPHW:266571,000 population served2012
Fruitland Park WWTPHW:267801,000 population served2012
Florida State HospitalHW:269181,000 population served2012
WHITE SPRINGS WWTPHW:269221,000 population served2012
Wauchula Hills WWTFHW:269251,000 population served2012
MAYO WWTFHW:269371,000 population served2012
FOX LAKE TALL OAKS STPHW:275911,000 population served2012
WITT STPHW:278961,000 population served2012
BUNKER HILL WWTPHW:282071,000 population served2012
Campbell Township RSDHW:282901,000 population served2012
Bear High Wolf Lake RSDHW:283861,000 population served2012
Jeffersonville WWTP 2HW:283901,000 population served2012
ALLISON LAGOONHW:284751,000 population served2012
KEOTA WWTPHW:287771,000 population served2012
MARQUETTE WWTPHW:288581,000 population served2012
MUNFORDVILLEHW:300221,000 population served2012
KEVIL STPHW:300941,000 population served2012
POLLOCK STPHW:301861,000 population served2012
NORWAY S T PHW:304931,000 population served2012
SWALLOW FALLS STATE PARKHW:306551,000 population served2012
WOODSBORO STPHW:306781,000 population served2012
MAYVILLE STPHW:309411,000 population served2012
COFFEEVILLE POTWHW:314271,000 population served2012
MINER STPHW:318021,000 population served2012
FORDLAND WWTPHW:324031,000 population served2012
PLAINS WWTPHW:325751,000 population served2012
LOUP CITY WWTPHW:329101,000 population served2012
Washoe Co HUFFAKER HILLS RESERVOIRHW:331481,000 population served2012
Angel Fire Village ofHW:335021,000 population served2012
PAA KOHW:335161,000 population served2012
Suffolk Co SCSD 28 FairfieldHW:335441,000 population served2012
NYSDOC Woodbourne Corr FacHW:336581,000 population served2012
Ashland T Hamlet WWTP and Onsite WWTSHW:337741,000 population served2012
Norfolk T STP and On Site SysHW:338861,000 population served2012
MAYSVILLE WWTPHW:342861,000 population served2012
Washington Co Riverview Estates WWTP and SewersHW:347581,000 population served2012
Franklin Co Oakhurst Knolls WWTPHW:351101,000 population served2012
Warren Co Sycamore Trails WWTPHW:354801,000 population served2012
UNION CITY WWTHW:356461,000 population served2012
GRAND RONDE STPHW:361271,000 population served2012
WORCESTER TWP VALLEY GREEN STPHW:362651,000 population served2012
ROBESON SEWAGE FACILITYHW:363601,000 population served2012
HALIFAX BORO STPHW:363631,000 population served2012
PARADISE TWP STPHW:363741,000 population served2012
HUSTON TWP PENFIELD_HOLLYWOOD STPHW:364101,000 population served2012
INDIANA CO MSA ARMAGH STPHW:367171,000 population served2012
MOUNT MORRIS STPHW:369851,000 population served2012
BUCKSPORT WWTPHW:372231,000 population served2008
CARTWRIGHT CREEK STPHW:373381,000 population served2012
West Warren_Viola STPHW:374591,000 population served2012
TREZEVANT STPHW:375271,000 population served2012
Rayburn Country MUDHW:376081,000 population served2012
Cross Plains WWTPHW:377111,000 population served2012
FARMERSVILLE STPHW:378221,000 population served2012
Krum WWTPHW:378331,000 population served2012
Lakeside City WWTPHW:378831,000 population served2012
Babylon Street Plant WWTPHW:380641,000 population served2012
Moulton WWTPHW:380831,000 population served2012
Robert Lee WWTPHW:381031,000 population served2012
WARSAW SERVICE AREAHW:384241,000 population served2012
LA PUSH SEWAGE TRT PLANTHW:385941,000 population served2012
ELIZABETH WWTPHW:390361,000 population served2012
RAYMOND POTW WESTHW:31590999 population served2012
Apple Creek WWTP and SewersHW:34833999 population served2012
CONOY TWP BAINBRIDGE STPHW:36370999 population served2012
SPRING TWP SNYDER STPHW:36664999 population served2012
SIX MILE RUN STPHW:37034999 population served2012
CLAY WWTPHW:38825999 population served2012
ST JACOB STPHW:27652998 population served2012
WINTER HARBOR WWTFHW:30457998 population served2012
Twin Cities WWTPHW:30669998 population served2012
NASHVILLE STPHW:31056998 population served2012
ELLERBE WWTPHW:34360998 population served2012
Luckey WWTP and Sewer SystemHW:35239998 population served2012
SIBLEY LAGOONHW:30337997 population served2012
VALDERS STPHW:39490997 population served2012
WALHALLA LAGOONHW:34703996 population served2012
COWICHE STPHW:38764996 population served2012
BALSAM LAKE STPHW:39146996 population served2012
ARCO S_T FACILITYHW:27481995 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.