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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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All countries

17,009 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

States

17,009 results

CompareNameNative sizeYear
Harris Co MUD #86 WWTPHouston0.43 MGD (million gallons per day)2022
Roman Forest WWTPHouston0.43 MGD (million gallons per day)2022
Oak Lake WWTPSugar Land0.43 MGD (million gallons per day)2022
GILBERT STLGilbert0.428 MGD (million gallons per day)2022
KEYSTONE WWTPKeystone0.428 MGD (million gallons per day)2022
Thomaston WPCFThomaston0.427 MGD (million gallons per day)2022
Sherburne (V) STPSherburne0.427 MGD (million gallons per day)2022
OWEN WWTPOwen0.426 MGD (million gallons per day)2022
Gravel Ridge SID #213 WWTPSherwood0.425 MGD (million gallons per day)2022
Lumpkin WPCPLumpkin0.425 MGD (million gallons per day)2022
CLINTON STPClinton0.425 MGD (million gallons per day)2022
MARS HILL WWTPMars Hill0.425 MGD (million gallons per day)2022
Saugerties (T) Glasco STPGlasco0.424 MGD (million gallons per day)2022
Yorkville WWTP & Sewer SystemYorkville0.424 MGD (million gallons per day)2022
DUMONT STLDumont0.423 MGD (million gallons per day)2022
Utica WWTP & Sewer SystemUtica0.423 MGD (million gallons per day)2022
AVON WWTPAvon0.422 MGD (million gallons per day)2022
SHERIDAN STPSheridan0.422 MGD (million gallons per day)2022
Marked Tree WWTPMarked Tree0.42 MGD (million gallons per day)2022
Silverton , Town ofSilverton0.42 MGD (million gallons per day)2022
GALVESTON WWTPGalveston0.42 MGD (million gallons per day)2022
HALSTEAD WWTPHalstead0.42 MGD (million gallons per day)2022
LOUISBURG #1 (NORTH) WWTPLouisburg0.42 MGD (million gallons per day)2022
COLUMBUS WWTPColumbus0.42 MGD (million gallons per day)2022
GALENA WWTPGalena0.42 MGD (million gallons per day)2022
ONTONAGON STPWhite Pine0.42 MGD (million gallons per day)2022
WOLF POINT WWTPWolf Point0.42 MGD (million gallons per day)2022
Altamont (V) STPAltamont0.42 MGD (million gallons per day)2022
Jefferson Co Barber's Hollow WWTPSteubenville0.42 MGD (million gallons per day)2022
Peebles WWTP & Sewer SystemPeebles0.42 MGD (million gallons per day)2022
Mercer Co Montezuma/Club Island SDCelina0.42 MGD (million gallons per day)2022
LINDSAY WWTLindsay0.42 MGD (million gallons per day)2022
BREAKNECK CREEK REGIONAL STPMars0.42 MGD (million gallons per day)2022
Timber Ridge WWTPSpring0.42 MGD (million gallons per day)2022
Milam Street WWTPKarnes City0.42 MGD (million gallons per day)2022
DEER PARK POTWDeer Park0.42 MGD (million gallons per day)2022
BREWSTER STPBrewster0.418 MGD (million gallons per day)2022
NEW HANOVER TWP STPGilbertsville0.413 MGD (million gallons per day)2022
Carlisle WWTPCarlisle0.412 MGD (million gallons per day)2022
WINCHESTER STP & COLLECTION SYSTEMWinchester0.412 MGD (million gallons per day)2022
PIEDMONT WWTPiedmont0.412 MGD (million gallons per day)2022
Killbuck WWTP & SewersKillbuck0.411 MGD (million gallons per day)2022
BUTLER WWTPButler0.41 MGD (million gallons per day)2022
Hoxie WWTPHoxie0.41 MGD (million gallons per day)2022
Glenwood WWTPGlenwood0.41 MGD (million gallons per day)2022
Melbourne WWTPMelbourne0.41 MGD (million gallons per day)2022
LOST HILLS WWTFLost Hills0.41 MGD (million gallons per day)2022
Toccoa Creek WPCPToccoa0.41 MGD (million gallons per day)2022
OBLONG STPOblong0.41 MGD (million gallons per day)2022
CHURUBUSCO WWTPChurubusco0.41 MGD (million gallons per day)2022
CENTERVILLE WEST WWTPCenterville0.41 MGD (million gallons per day)2022
COUNCIL GROVE WWTPCouncil Grove0.41 MGD (million gallons per day)2022
VANCEBURG STPVanceburg0.41 MGD (million gallons per day)2022
JONESBORO NORTH PONDJonesboro0.41 MGD (million gallons per day)2022
WHITE CLOUD STPWhite Cloud0.41 MGD (million gallons per day)2022
OVID TWP LAGOONOvid0.41 MGD (million gallons per day)2022
ELK RAPIDS STPElk Rapids0.41 MGD (million gallons per day)2022
EAST BETHEL CSAndover0.41 MGD (million gallons per day)2022
HAYFIELD WWTPHayfield0.41 MGD (million gallons per day)2022
Thompson (T) Emerald Green SD & WWTPMonticello0.41 MGD (million gallons per day)2022
ATOKA WWTAtoka0.41 MGD (million gallons per day)2022
Tellico Plains WWTPTellico Plains0.41 MGD (million gallons per day)2022
Wolfforth WWTPWolfforth0.41 MGD (million gallons per day)2022
Airport - DenisonDenison0.41 MGD (million gallons per day)2022
Ransom Canyon WWTPRansom Canyon0.41 MGD (million gallons per day)2022
LYNDEN STPLynden0.41 MGD (million gallons per day)2022
HUTTONSVILLE PSD WWTPMill Creek0.41 MGD (million gallons per day)2022
LANSING WWTPLansing0.407 MGD (million gallons per day)2022
Tatum WWTPTatum0.407 MGD (million gallons per day)2022
MAPLETON WWTPMapleton0.406 MGD (million gallons per day)2022
NEW CORDELL WWTCordell0.406 MGD (million gallons per day)2022
Glades County Correctional WWTPMoore Haven0.405 MGD (million gallons per day)2022
Willow Springs WWTPWillow Springs0.405 MGD (million gallons per day)2022
Van Horn WWTPVan Horn0.405 MGD (million gallons per day)2022
Harrisburg WWTPHarrisburg0.403 MGD (million gallons per day)2022
MACKS INN-IS PK VILLAGE POTWMacks Inn0.403 MGD (million gallons per day)2022
New Premont WWTPPremont0.403 MGD (million gallons per day)2022
FREEDOM SD WWTPFreedom0.402 MGD (million gallons per day)2022
OPP EASTSIDE WWTPOpp0.4 MGD (million gallons per day)2022
CLAYTON WWTPClayton0.4 MGD (million gallons per day)2022
CLIO LAGOONClio0.4 MGD (million gallons per day)2022
Leighton WWTPLeighton0.4 MGD (million gallons per day)2022
Thorne Bay WWTPThorne Bay0.4 MGD (million gallons per day)2022
Marianna - North WWTPMarianna0.4 MGD (million gallons per day)2022
Austin WWTPAustin0.4 MGD (million gallons per day)2022
Lavaca WWTPLavaca0.4 MGD (million gallons per day)2022
Cotton Plant WWTPCotton Plant0.4 MGD (million gallons per day)2022
RIO DELL WWTFRio Dell0.4 MGD (million gallons per day)2022
Heritage Ranch Sewer Treatm PlantPaso Robles0.4 MGD (million gallons per day)2022
FRANKLIN WWTFMerced0.4 MGD (million gallons per day)2022
San Andreas Sanitary District WWTPSan Andreas0.4 MGD (million gallons per day)2022
Strathmore WWTFPorterville0.4 MGD (million gallons per day)2022
Tipton WWTFTipton0.4 MGD (million gallons per day)2022
Whispering Palms WPCFRancho Santa Fe0.4 MGD (million gallons per day)2022
COLORADO CITY STPColorado City0.4 MGD (million gallons per day)2022
Bennett, Town ofBennett0.4 MGD (million gallons per day)2022
NEW HARTFORD, TOWN OFNew Hartford0.4 MGD (million gallons per day)2022
CANAAN FIRE DISTRICT WPCFCanaan0.4 MGD (million gallons per day)2022
SPRAGUE WPCFBaltic0.4 MGD (million gallons per day)2022
Havana WWTFHavana0.4 MGD (million gallons per day)2022

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.