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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
Homer WWTPHomer0.88 MGD (million gallons per day)2022
Riverside Sewage Treatment PlantOrofino0.88 MGD (million gallons per day)2022
GRANGEVILLE S/T FACILITYGrangeville0.88 MGD (million gallons per day)2022
SPRINGFIELD STPSpringfield0.88 MGD (million gallons per day)2022
Hayti Aerated WWT LagoonHayti0.88 MGD (million gallons per day)2022
LAUREL WWTPLaurel0.88 MGD (million gallons per day)2022
Manchester-Shortsville (V) Jt. STPManchester0.88 MGD (million gallons per day)2022
LAFAYETTE STPLafayette0.88 MGD (million gallons per day)2022
Kemah WWTPKemah0.88 MGD (million gallons per day)2022
OGLESBY STPOglesby0.879 MGD (million gallons per day)2022
Owentown WWTPTyler0.875 MGD (million gallons per day)2022
Sewer District #700 (Chippewa)Chippewa Lake0.874 MGD (million gallons per day)2022
GARNER STLGarner0.873 MGD (million gallons per day)2022
PLEASANTVILLE WWTPPleasantville0.87 MGD (million gallons per day)2022
BCRSD South Route K WWTPColumbia0.87 MGD (million gallons per day)2022
CRETE WWTPCrete0.87 MGD (million gallons per day)2022
New Lexington WWTP & Sewer SystemNew Lexington0.87 MGD (million gallons per day)2022
CANNON BEACH STPCannon Beach0.87 MGD (million gallons per day)2022
CLARION WWTPClarion0.867 MGD (million gallons per day)2022
POSTVILLE WWTPPostville0.867 MGD (million gallons per day)2022
Saint Henry WWTP & Sewer SystemSaint Henry0.867 MGD (million gallons per day)2022
GRANITE FALLS STPGranite Falls0.865 MGD (million gallons per day)2022
PFAS Treatment MarquetteMarquette0.864 MGD (million gallons per day)2022
HOLMEN WWTPOnalaska0.863 MGD (million gallons per day)2022
Gurdon WWTPGurdon0.86 MGD (million gallons per day)2022
SAVANNA, City ofSavanna0.86 MGD (million gallons per day)2022
Lee Sewerage Collection System and WPCFLee0.86 MGD (million gallons per day)2022
Mount Morris (V) WWTPMount Morris0.86 MGD (million gallons per day)2022
COBURG STPCorvallis0.86 MGD (million gallons per day)2022
Carryville-Jacksboro WWTPCaryville0.86 MGD (million gallons per day)2022
DURAND WWTPDurand0.86 MGD (million gallons per day)2022
RENVILLE WWTPRenville0.853 MGD (million gallons per day)2022
Waldron WWTPWaldron0.85 MGD (million gallons per day)2022
Hot Springs - Southwest WWTPHot Springs National Park0.85 MGD (million gallons per day)2022
Prescott WWTPPrescott0.85 MGD (million gallons per day)2022
HOLTVILLE WWTFHoltville0.85 MGD (million gallons per day)2022
LIMON WWTPLimon0.85 MGD (million gallons per day)2022
TWA - Walnut Drive WRFHaines City0.85 MGD (million gallons per day)2022
N Hutchinson Island WWTFFort Pierce0.85 MGD (million gallons per day)2022
Ocilla LASOcilla0.85 MGD (million gallons per day)2022
City of FruitlandFruitland0.85 MGD (million gallons per day)2022
ANNA STPAnna0.85 MGD (million gallons per day)2022
EARLHAM WWTPEarlham0.85 MGD (million gallons per day)2022
HUXLEY WWTPHuxley0.85 MGD (million gallons per day)2022
WEST UNION NORTH WWTPWest Union0.85 MGD (million gallons per day)2022
HIAWATHA SOUTH WWTPHiawatha0.85 MGD (million gallons per day)2022
WALTONWalton0.85 MGD (million gallons per day)2022
WEST LIBERTYWest Liberty0.85 MGD (million gallons per day)2022
ARCADIA SEWERAGE SYSTEMArcadia0.85 MGD (million gallons per day)2022
LAKE PROVIDENCE N. PONDLake Providence0.85 MGD (million gallons per day)2022
GRAMERCY STPGramercy0.85 MGD (million gallons per day)2022
Delmar STP & Coll. Sys.Delmar0.85 MGD (million gallons per day)2022
Deerfield Sewerage Collection System and WWTFsDeerfield0.85 MGD (million gallons per day)2022
Pike Creek Sewer District WWTFPoplar Bluff0.85 MGD (million gallons per day)2022
Northeast Correctional Center WWTPBowling Green0.85 MGD (million gallons per day)2022
Fredericktown WWTPFredericktown0.85 MGD (million gallons per day)2022
Newmarket WWTFNewmarket0.85 MGD (million gallons per day)2022
Suffolk(C0) SCSD #1 Port Jefferson STP & SewersPort Jefferson Station0.85 MGD (million gallons per day)2022
Lake Placid (V) Sewers & STPLake Placid0.85 MGD (million gallons per day)2022
Hamilton (V) WWTPHamilton0.85 MGD (million gallons per day)2022
Skaneateles (V) WWTPSkaneateles0.85 MGD (million gallons per day)2022
BENSON WWTPBenson0.85 MGD (million gallons per day)2022
MOUNT GILEAD WWTPMount Gilead0.85 MGD (million gallons per day)2022
WAHPETON WASTEWATERWahpeton0.85 MGD (million gallons per day)2022
DEPOE BAY STPDepoe Bay0.85 MGD (million gallons per day)2022
Caddo Basin SUDGreenville0.85 MGD (million gallons per day)2022
Shiner WWTPShiner0.85 MGD (million gallons per day)2022
PEA RIDGE PSD WWTP AHuntington0.85 MGD (million gallons per day)2022
LEBANON STPLebanon0.848 MGD (million gallons per day)2022
Owego (T) SD No. 1 WWTPOwego0.848 MGD (million gallons per day)2022
Thatcher WWTFThatcher0.84 MGD (million gallons per day)2022
Fordyce WWTPFordyce0.84 MGD (million gallons per day)2022
WHITELAND WWTPWhiteland0.84 MGD (million gallons per day)2022
VEEDERSBURG WWTPVeedersburg0.84 MGD (million gallons per day)2022
OSCODA TWP WWTPOscoda0.84 MGD (million gallons per day)2022
BIG LAKE WWTFBig Lake0.84 MGD (million gallons per day)2022
BELLE PLAINE WWTPBelle Plaine0.84 MGD (million gallons per day)2022
PELAHATCHIE POTWPelahatchie0.84 MGD (million gallons per day)2022
Chautauqua Utility District WWTPChautauqua0.84 MGD (million gallons per day)2022
Mayville (V) N.Chautauqua L.SD WWTPMayville0.84 MGD (million gallons per day)2022
Eastex Freeway WWTPHouston0.84 MGD (million gallons per day)2022
Leavenworth City of POTWLeavenworth0.84 MGD (million gallons per day)2022
LEWIS COWeston0.84 MGD (million gallons per day)2022
Harris Co MUD #8 WWTPHouston0.835 MGD (million gallons per day)2022
ARAB GILLIAM CREEK WWTPArab0.83 MGD (million gallons per day)2022
CHILDERSBURG BAILEY BR LAGOONChildersburg0.83 MGD (million gallons per day)2022
JACKSON LAGOONJackson0.83 MGD (million gallons per day)2022
DANVILLE STLDanville0.83 MGD (million gallons per day)2022
DYSART PLANTDysart0.83 MGD (million gallons per day)2022
TRIPOLI STLTripoli0.83 MGD (million gallons per day)2022
Suffolk (Co) SCSD #7 Twelve Pines STPMedford0.83 MGD (million gallons per day)2022
Greenport (T) STPHudson0.83 MGD (million gallons per day)2022
Erie Co SD 3 Blasdell (V) WWTPBuffalo0.83 MGD (million gallons per day)2022
TAYLORSVILLE WWTPTaylorsville0.83 MGD (million gallons per day)2022
PHILOMATH WWTPPhilomath0.83 MGD (million gallons per day)2022
Keene WWTPKeene0.83 MGD (million gallons per day)2022
North WWTP - GrovesGroves0.83 MGD (million gallons per day)2022
NORTHWOOD WWTPNorthwood0.829 MGD (million gallons per day)2022
LE CENTER STPLe Center0.824 MGD (million gallons per day)2022
LONE TREE SOUTH WWTPLone Tree0.822 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.