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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
PELLA WWTPPella4.31 MGD (million gallons per day)2022
Peachtree City Rockaway WPCPPeachtree City4.301 MGD (million gallons per day)2022
Ironhouse WRFOakley4.3 MGD (million gallons per day)2022
CALEXICO WWTFCalexico4.3 MGD (million gallons per day)2022
SEYMOUR STPSeymour4.3 MGD (million gallons per day)2022
BEREABerea4.3 MGD (million gallons per day)2022
Milford Sewerage Collection System and WWTFHopedale4.3 MGD (million gallons per day)2022
VIRGINIA WWTPVirginia4.3 MGD (million gallons per day)2022
Southwest Licking Community WSD WWTP and SewersHebron4.3 MGD (million gallons per day)2022
EPHRATA BORO STPEphrata4.3 MGD (million gallons per day)2022
MANCHESTER WWTPManchester4.3 MGD (million gallons per day)2022
Bay City WWTPBay City4.3 MGD (million gallons per day)2022
EDWARDSVILLE STPEdwardsville4.28 MGD (million gallons per day)2022
OELWEIN STPOelwein4.27 MGD (million gallons per day)2022
ROCKINGHAM WWTPRockingham4.25 MGD (million gallons per day)2022
GRINNELL WWTPGrinnell4.236 MGD (million gallons per day)2022
GTUA-Gainsville WWTPGainesville4.23 MGD (million gallons per day)2022
NMDGF/Rock Lake State Fish HatcherySanta Rosa4.226 MGD (million gallons per day)2022
Oxford WWTP & Sewer SystemOxford4.212 MGD (million gallons per day)2022
GUNNISON WWTPGunnison4.2 MGD (million gallons per day)2022
Tri-Lakes WWTFMonument4.2 MGD (million gallons per day)2022
NORTHGLENN WWTPBrighton4.2 MGD (million gallons per day)2022
Monument SD (Tri-Lakes WWTF)Monument4.2 MGD (million gallons per day)2022
EAST PEORIA SEWAGE TP #1East Peoria4.2 MGD (million gallons per day)2022
BATAVIA STPBatavia4.2 MGD (million gallons per day)2022
CARROLL WWTPCarroll4.2 MGD (million gallons per day)2022
FAIRFIELD WWTPFairfield4.2 MGD (million gallons per day)2022
CAMPBELLSVILLE STPCampbellsville4.2 MGD (million gallons per day)2022
City of Saco Water Resource Recovery DivisionSaco4.2 MGD (million gallons per day)2022
Barnstable Sewerage Collection System and WWTFBarnstable4.2 MGD (million gallons per day)2022
Carlsbad, City ofCarlsbad4.2 MGD (million gallons per day)2022
Trumbull Co Mosquito Creek WWTPWarren4.2 MGD (million gallons per day)2022
OWASSO PWA WWTOwasso4.2 MGD (million gallons per day)2022
ASTORIA STPAstoria4.2 MGD (million gallons per day)2022
Kuelher Road South WWTPNew Braunfels4.2 MGD (million gallons per day)2022
PULLMAN STPPullman4.2 MGD (million gallons per day)2022
PRINCETON WWTPPrinceton4.186 MGD (million gallons per day)2022
DAPHNE WATER RECLAMATION FACILITYDaphne4.17 MGD (million gallons per day)2022
DENISON WWTPDenison4.17 MGD (million gallons per day)2022
EAGLE GROVE WWTPEagle Grove4.15 MGD (million gallons per day)2022
Marlborough (Westerly) Sewerage Collection System and WWTPMarlborough4.15 MGD (million gallons per day)2022
OKMULGEE WWTOkmulgee4.15 MGD (million gallons per day)2022
THE DALLES STPThe Dalles4.15 MGD (million gallons per day)2022
Somerset Sewerage Collection System and WPCFSomerset4.14 MGD (million gallons per day)2022
Adams Sewerage Collection System and WWTFAdams4.14 MGD (million gallons per day)2022
Mansfield (MFN) Sewerage Collection System and WWTFNorton4.14 MGD (million gallons per day)2022
MT PLEASANT WWTPMount Pleasant4.14 MGD (million gallons per day)2022
Crestview WWTPCrestview4.13 MGD (million gallons per day)2022
Cactus WWTPCactus4.13 MGD (million gallons per day)2022
PCRWRD Green Valley WRFGreen Valley4.1 MGD (million gallons per day)2022
MOUNT VERNON WWTPMount Vernon4.1 MGD (million gallons per day)2022
JESSAMINE CREEK ENV CONTROL WWTPNicholasville4.1 MGD (million gallons per day)2022
Chautauqua (Co) S&CCLSD WWTPCeloron4.1 MGD (million gallons per day)2022
PARKER BRANCH STPHuntsville4.1 MGD (million gallons per day)2022
MOOREFIELD WWTPMoorefield4.1 MGD (million gallons per day)2022
SUSSEX REGIONAL WWTPSussex4.1 MGD (million gallons per day)2022
Derry WWTFDerry4.09 MGD (million gallons per day)2022
Pinole-Hercules Water Pollution Control PlantPinole4.06 MGD (million gallons per day)2022
COFFEYVILLE WWTPCoffeyville4.06 MGD (million gallons per day)2022
Puyallup WWTP (EPA)Puyallup4.06 MGD (million gallons per day)2022
OSKALOOSA SW STPOskaloosa4.024 MGD (million gallons per day)2022
Enterprise Northeast WWTPEnterprise4 MGD (million gallons per day)2022
FAIRHOPE WWTPFairhope4 MGD (million gallons per day)2022
GULF SHORES WWTPGulf Shores4 MGD (million gallons per day)2022
Huntsville Chase WWTPHuntsville4 MGD (million gallons per day)2022
Opelika-Westside WWTPOpelika4 MGD (million gallons per day)2022
PRATTVILLE AUTAUGA CREEK WWTPPrattville4 MGD (million gallons per day)2022
PRATTVILLE PINE CREEK WWTPPrattville4 MGD (million gallons per day)2022
PRICHARD CARLO A MORRIS WWTPMobile4 MGD (million gallons per day)2022
Jefferson County-Trussville WWTPTrussville4 MGD (million gallons per day)2022
LOWER VALLEY WWTPValley4 MGD (million gallons per day)2022
Sierra Vista WWTFSierra Vista4 MGD (million gallons per day)2022
Flagstaff Rio de Flag WWTFFlagstaff4 MGD (million gallons per day)2022
Peoria Beardsley WRFPeoria4 MGD (million gallons per day)2022
Bullhead City Section 10 WWTPBullhead City4 MGD (million gallons per day)2022
PCRWRD Avra Valley WWTFTucson4 MGD (million gallons per day)2022
Coolidge - Airport WWTFCoolidge4 MGD (million gallons per day)2022
Little Rock - Little Maumelle WWTPLittle Rock4 MGD (million gallons per day)2022
Green Forest WWTPGreen Forest4 MGD (million gallons per day)2022
Van Buren - Main WWTPVan Buren4 MGD (million gallons per day)2022
Bentonville WWTPBentonville4 MGD (million gallons per day)2022
De Queen WWTPDe Queen4 MGD (million gallons per day)2022
Adelanto, City ofAdelanto4 MGD (million gallons per day)2022
Sewer Authority Mid-Coastside WWTFHalf Moon Bay4 MGD (million gallons per day)2022
El Dorado Hills WWTPEl Dorado Hills4 MGD (million gallons per day)2022
BEAUMONT WWTFBeaumont4 MGD (million gallons per day)2022
PARKER WWTPParker4 MGD (million gallons per day)2022
Silverthorne / Dillon JSASilverthorne4 MGD (million gallons per day)2022
SHELTON WPCFShelton4 MGD (million gallons per day)2022
Wolfe Neck WWTFRehoboth Beach4 MGD (million gallons per day)2022
JEA Greenland WRFJacksonville4 MGD (million gallons per day)2022
Southwest WRFSarasota4 MGD (million gallons per day)2022
TARPON SPRINGS AWWTFTarpon Springs4 MGD (million gallons per day)2022
TITUSVILLE SOUTH PLANT Blue Heron WRFTitusville4 MGD (million gallons per day)2022
Spencer WWTPOrange Park4 MGD (million gallons per day)2022
Fleming Island Reg. WWTPOrange Park4 MGD (million gallons per day)2022
IRCUD/Central WWTFVero Beach4 MGD (million gallons per day)2022
Ocala WRF #3Ocala4 MGD (million gallons per day)2022
Southwest Regional WWTFMulberry4 MGD (million gallons per day)2022
Auburndale Regional WWTPAuburndale4 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.