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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
Perry (V), WWTPPerry0.97 MGD (million gallons per day)2022
GROVE MSA WWTGrove0.97 MGD (million gallons per day)2022
Stanley Lake WWTPMontgomery0.97 MGD (million gallons per day)2022
MONTGOMERY WWTPMontgomery0.968 MGD (million gallons per day)2022
Sparks Branch WWTPPittsburg0.968 MGD (million gallons per day)2022
AUDUBON WWTPAudubon0.967 MGD (million gallons per day)2022
GRAYSON STPGrayson0.966 MGD (million gallons per day)2022
MILLSTADT STPMillstadt0.965 MGD (million gallons per day)2022
MORRIS WWTPMorris0.964 MGD (million gallons per day)2022
GUADALUPE WWTFGuadalupe0.96 MGD (million gallons per day)2022
GYPSUM WWTFGypsum0.96 MGD (million gallons per day)2022
MACKINAC ISLAND STPMackinac Island0.96 MGD (million gallons per day)2022
Rogersville WWTPRogersville0.96 MGD (million gallons per day)2022
MYRTLE CREEK STPMyrtle Creek0.96 MGD (million gallons per day)2022
Cameron WWTPCameron0.96 MGD (million gallons per day)2022
Newton WWTPNewton0.96 MGD (million gallons per day)2022
Big Cedar Creek - Wrightsville WPCPWrightsville0.955 MGD (million gallons per day)2022
Palmer Aerated LagoonPalmer0.95 MGD (million gallons per day)2022
Texarkana - North WWTPTexarkana0.95 MGD (million gallons per day)2022
Ozark WWTPOzark0.95 MGD (million gallons per day)2022
San Leandro, City of (WPCP)San Leandro0.95 MGD (million gallons per day)2022
Nassau Amelia Utilities WWTFFernandina Beach0.95 MGD (million gallons per day)2022
SMITHTON WWTPSmithton0.95 MGD (million gallons per day)2022
FORTVILLE WWTPFortville0.95 MGD (million gallons per day)2022
UPLAND WWTPUpland0.95 MGD (million gallons per day)2022
SIGOURNEY EAST WWTPSigourney0.95 MGD (million gallons per day)2022
JOPPATOWNE WWTPJoppa0.95 MGD (million gallons per day)2022
DURANT POTWDurant0.95 MGD (million gallons per day)2022
El Dorado Springs WWTPEl Dorado Springs0.95 MGD (million gallons per day)2022
TONOPAH ReuseTonopah0.95 MGD (million gallons per day)2022
Sherrill (C) STPSherrill0.95 MGD (million gallons per day)2022
Madison (Co) S.D. STP at CazenoviaCazenovia0.95 MGD (million gallons per day)2022
Pitsburg WWTP & SewersPitsburg0.95 MGD (million gallons per day)2022
Hicksville WWTP & Sewer SystemHicksville0.95 MGD (million gallons per day)2022
Crestline WWTP & Sewer SystemCrestline0.95 MGD (million gallons per day)2022
Saint Clairsville North WWTPSaint Clairsville0.95 MGD (million gallons per day)2022
ALTUS SW WWTAltus0.95 MGD (million gallons per day)2022
HARRAH WWTHarrah0.95 MGD (million gallons per day)2022
N AND S SHENANGO STPJamestown0.95 MGD (million gallons per day)2022
Rocky Top STPAndersonville0.95 MGD (million gallons per day)2022
GBRA - Stein Falls WRFNew Braunfels0.95 MGD (million gallons per day)2022
Carrizo Springs WWTPCarrizo Springs0.95 MGD (million gallons per day)2022
Van Alstyne WWTPVan Alstyne0.95 MGD (million gallons per day)2022
Breckenridge WWTPBreckenridge0.95 MGD (million gallons per day)2022
Cash SUD - Caddo Creek WWTPGreenville0.95 MGD (million gallons per day)2022
HUDSON WWTPLufkin0.95 MGD (million gallons per day)2022
Forest Cove WWTPHouston0.95 MGD (million gallons per day)2022
Southdown WWTPPearland0.95 MGD (million gallons per day)2022
Concord Bridge WWTPHouston0.95 MGD (million gallons per day)2022
Bellville WWTPBellville0.95 MGD (million gallons per day)2022
San Leon WWTPGalveston0.95 MGD (million gallons per day)2022
Galena Park WWTP #1Galena Park0.95 MGD (million gallons per day)2022
Greenwood Parkway WWTPHouston0.95 MGD (million gallons per day)2022
April Sound CS - April Sound WWTPConroe0.95 MGD (million gallons per day)2022
Imperial Oaks WWTPHouston0.95 MGD (million gallons per day)2022
April Sound WWTPMontgomery0.95 MGD (million gallons per day)2022
Elgin WWTPAustin0.95 MGD (million gallons per day)2022
Vint Hill Farms STPWarrenton0.95 MGD (million gallons per day)2022
STORY CITY WASTEWATERStory City0.948 MGD (million gallons per day)2022
MATHIS STPMathis0.947 MGD (million gallons per day)2022
BRISTOW WWTBristow0.945 MGD (million gallons per day)2022
Madisonville WWTPMadisonville0.945 MGD (million gallons per day)2022
COLUMBIANA WWTPColumbiana0.944 MGD (million gallons per day)2022
MORRISON STP & COLLECTION SYSTEMMorrison0.941 MGD (million gallons per day)2022
ROBERTSDALE WWTPRobertsdale0.94 MGD (million gallons per day)2022
ATKINS WWTPAtkins0.94 MGD (million gallons per day)2022
FULTON STPFulton0.94 MGD (million gallons per day)2022
WAGONER PWA WWTWagoner0.94 MGD (million gallons per day)2022
Northwest Lake Granbury WWTPGranbury0.94 MGD (million gallons per day)2022
Ash Creek WWTPAzle0.94 MGD (million gallons per day)2022
CORYDON WWTPCorydon0.936 MGD (million gallons per day)2022
SPRING VALLEY WWTPSpring Valley0.936 MGD (million gallons per day)2022
DUNLAP STPDunlap0.934 MGD (million gallons per day)2022
MUNISING STPMunising0.933 MGD (million gallons per day)2022
NEWTOWN WPCFNewtown0.932 MGD (million gallons per day)2022
PERHAM WWTPPerham0.932 MGD (million gallons per day)2022
GUILFORD-SANGERVILLE WWTFGuilford0.93 MGD (million gallons per day)2022
ALBERTVILLE WWTPAlbertville0.93 MGD (million gallons per day)2022
PIPESTONE WWTPPipestone0.93 MGD (million gallons per day)2022
Minerva WWTP & Sewer SystemMinerva0.93 MGD (million gallons per day)2022
Oak Harbor WWTP & Sewer SystemOak Harbor0.93 MGD (million gallons per day)2022
Laredo North WWTPLaredo0.93 MGD (million gallons per day)2022
Kirbyville WWTPKirbyville0.93 MGD (million gallons per day)2022
POCAHONTAS WWTPPocahontas0.92 MGD (million gallons per day)2022
SLATER STLSlater0.92 MGD (million gallons per day)2022
VINTON SEWERAGE SYSTEMVinton0.92 MGD (million gallons per day)2022
CANNON FALLS WWTPCannon Falls0.92 MGD (million gallons per day)2022
Swanton WWTP & Sewer SystemSwanton0.92 MGD (million gallons per day)2022
Monahans WWTPMonahans0.92 MGD (million gallons per day)2022
CHILTON STPChilton0.92 MGD (million gallons per day)2022
SILVER BAY WWTPSilver Bay0.919 MGD (million gallons per day)2022
WARSAW WWTPWarsaw0.915 MGD (million gallons per day)2022
Falling Creek WPCPElberton0.913 MGD (million gallons per day)2022
Granville WWTP & Sewer SystemGranville0.911 MGD (million gallons per day)2022
EAST ALTON STPEast Alton0.91 MGD (million gallons per day)2022
FAIRFIELD SEWAGE TREATMENFairfield0.91 MGD (million gallons per day)2022
Paducah McCracken Co JSA -WoodlawnPaducah0.91 MGD (million gallons per day)2022
AURORA MUN WWTFAurora0.91 MGD (million gallons per day)2022
PELICAN RAPIDS WWTPPelican Rapids0.91 MGD (million gallons per day)2022
MCCOOK WWTPMc Cook0.91 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.