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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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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
BEND WRFBend7.1 MGD (million gallons per day)2022
MILLER CREEK STPNormandy Park7.1 MGD (million gallons per day)2022
TACOMA #3 STP NORTHTacoma7.1 MGD (million gallons per day)2022
Greenridge WWTPHouston7.05 MGD (million gallons per day)2022
KISKI VALLEY WPCALeechburg7.04 MGD (million gallons per day)2022
Troy WWTP & Sewer SystemTroy7.002 MGD (million gallons per day)2022
El Dorado - South WWTPEl Dorado7 MGD (million gallons per day)2022
Calera Creek Water Recycling PlantPacifica7 MGD (million gallons per day)2022
Willits WWTFWillits7 MGD (million gallons per day)2022
Novato WWTFNovato7 MGD (million gallons per day)2022
MADERA STPMadera7 MGD (million gallons per day)2022
San Clemente, City of (Water Reclamation Plant)San Clemente7 MGD (million gallons per day)2022
TORRINGTON MAIN WPCFTorrington7 MGD (million gallons per day)2022
City of North Port WWTPNorth Port7 MGD (million gallons per day)2022
Military Point Regional AWTFPanama City7 MGD (million gallons per day)2022
DAVID B LEE STPMelbourne7 MGD (million gallons per day)2022
NEW SMYRNA BEACH STPNew Smyrna Beach7 MGD (million gallons per day)2022
Carrollton LASCarrollton7 MGD (million gallons per day)2022
Fitzgerald C.A. Newcomer WPCPFitzgerald7 MGD (million gallons per day)2022
LAPORTE WWTPLa Porte7 MGD (million gallons per day)2022
BOONE WWTPBoone7 MGD (million gallons per day)2022
KCK WWTP #20 WWTPKansas City7 MGD (million gallons per day)2022
JO CO MISSION TOWNSHIP MSD #1 WWTPMission7 MGD (million gallons per day)2022
LAFAYETTE - SOUTH SEWAGE PLANTLafayette7 MGD (million gallons per day)2022
Shreveport North Regional WWTPShreveport7 MGD (million gallons per day)2022
ADRIAN WWTPAdrian7 MGD (million gallons per day)2022
FARIBAULT WWTPFaribault7 MGD (million gallons per day)2022
HCUA,LONG BEACH/PASS CHRISTIANPass Christian7 MGD (million gallons per day)2022
JCUA - W JACKSON CO LAND POTWOcean Springs7 MGD (million gallons per day)2022
Carthage WWTPCarthage7 MGD (million gallons per day)2022
DCSD Wastewater Treatment Plant 2Saint Charles7 MGD (million gallons per day)2022
Cumberland County UA - Cohansey River STP/CSBridgeton7 MGD (million gallons per day)2022
Newburgh (C) Sewers & WWTPNewburgh7 MGD (million gallons per day)2022
Westchester (Co) Ossining SD STPOssining7 MGD (million gallons per day)2022
Little Falls (C) WWTP & Collection SystemLittle Falls7 MGD (million gallons per day)2022
Batavia (C/T) Joint WWTPBatavia7 MGD (million gallons per day)2022
Olean (C) WWTPOlean7 MGD (million gallons per day)2022
MT. AIRY WWTPMount Airy7 MGD (million gallons per day)2022
North Olmsted WWTP & Sewer SystemNorth Olmsted7 MGD (million gallons per day)2022
Sidney WWTP & Sewer SystemSidney7 MGD (million gallons per day)2022
BARTLESVILLE WWTBartlesville7 MGD (million gallons per day)2022
LRBSA THROOP STPScranton7 MGD (million gallons per day)2022
SHAMOKIN-COAL TWP STPShamokin7 MGD (million gallons per day)2022
NORTH PLANT 'A' (VEREEN)Longs7 MGD (million gallons per day)2022
Mt. Pleasant/Henry Clay Duffie WWTPMount Pleasant7 MGD (million gallons per day)2022
GREENEVILLE STPGreeneville7 MGD (million gallons per day)2022
Chocolate Bayou WWTPHouston7 MGD (million gallons per day)2022
FWSD #23 WWTPHouston7 MGD (million gallons per day)2022
Kingwood Central WWTPHouston7 MGD (million gallons per day)2022
TOTOPOTOMOY WWTPMechanicsville7 MGD (million gallons per day)2022
WALWORTH COUNTY MSD STPDelavan7 MGD (million gallons per day)2022
GRAND ISLAND WWTPGrand Island6.9 MGD (million gallons per day)2022
LEAVENWORTH WWTPLeavenworth6.88 MGD (million gallons per day)2022
SALMON CREEK STP #1Burien6.88 MGD (million gallons per day)2022
PEKIN STP #1Pekin6.84 MGD (million gallons per day)2022
Palm Coast WWTP #1Palm Coast6.83 MGD (million gallons per day)2022
RWRA OWENSBORO EASTOwensboro6.8 MGD (million gallons per day)2022
SALISBURY WWTFSalisbury6.8 MGD (million gallons per day)2022
Springfield NW WWTPSpringfield6.8 MGD (million gallons per day)2022
Kingston (C) Sewers & WWTPKingston6.8 MGD (million gallons per day)2022
MSD Taylor Creek Drainage BasinCleves6.8 MGD (million gallons per day)2022
MIDDLE RIVER STPVerona6.8 MGD (million gallons per day)2022
SPRINGVILLESpringville6.79 MGD (million gallons per day)2022
KUNA NORTH WW TREATMENT PLANTKuna6.75 MGD (million gallons per day)2022
FREEPORT STPFreeport6.75 MGD (million gallons per day)2022
Ellis Creek WRFPetaluma6.7 MGD (million gallons per day)2022
South Orange County Wastewater Authority (Coastal Treatment Plant)Laguna Niguel6.7 MGD (million gallons per day)2022
Waycross WPCPWaycross6.7 MGD (million gallons per day)2022
LAKE CHARLES PLANT ALake Charles6.7 MGD (million gallons per day)2022
NEW ULM WWTPNew Ulm6.7 MGD (million gallons per day)2022
MOORE CO REGIONAL WWTP (ADDOR)Aberdeen6.7 MGD (million gallons per day)2022
Copperfield WWTPHouston6.7 MGD (million gallons per day)2022
GRAND HAVEN STPGrand Haven6.67 MGD (million gallons per day)2022
North Little Rock - 5 Mile CreekNorth Little Rock6.6 MGD (million gallons per day)2022
WILKESBORO CUB CRK WWTPWilkesboro6.6 MGD (million gallons per day)2022
BELLE GLADE STPBelle Glade6.52 MGD (million gallons per day)2022
RUSTON NORTH PLANTRuston6.52 MGD (million gallons per day)2022
LACSD (Saugus WRP)Santa Clarita6.5 MGD (million gallons per day)2022
Sewerage Commis.-Oroville Reg. WWTPOroville6.5 MGD (million gallons per day)2022
Western Region WWTFBelle Glade6.5 MGD (million gallons per day)2022
OCALA WRF #2Ocala6.5 MGD (million gallons per day)2022
ACME STPLoxahatchee6.5 MGD (million gallons per day)2022
CAROL STREAM STPCarol Stream6.5 MGD (million gallons per day)2022
MSD - FLOYDS FORK STPLouisville6.5 MGD (million gallons per day)2022
DANVILLE STP & CSDanville6.5 MGD (million gallons per day)2022
TRENTON WWTPTrenton6.5 MGD (million gallons per day)2022
OXFORD POTWOxford6.5 MGD (million gallons per day)2022
Ogdensburg (C) WWTPOgdensburg6.5 MGD (million gallons per day)2022
Onondaga (Co) Meadowbrook LimestonSTPKirkville6.5 MGD (million gallons per day)2022
Canandaigua (C) STPCanandaigua6.5 MGD (million gallons per day)2022
NEUSE RIVER (NEW BERN) WWTPNew Bern6.5 MGD (million gallons per day)2022
LEXINGTON WWTPLexington6.5 MGD (million gallons per day)2022
Avon Lake WPCF & SewersAvon Lake6.5 MGD (million gallons per day)2022
Portsmouth Lawson Run WWTP & SewersPortsmouth6.5 MGD (million gallons per day)2022
AMBLER BORO STPAmbler6.5 MGD (million gallons per day)2022
NEW CASTLE STPNew Castle6.5 MGD (million gallons per day)2022
SHELBYVILLE STPShelbyville6.5 MGD (million gallons per day)2022
Sugarland Regional WWTP - BRASugar Land6.5 MGD (million gallons per day)2022
CNW REGIONAL WWTP & INTERCEPTOR SYSCoeburn6.5 MGD (million gallons per day)2022
PASCO STPPasco6.5 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.