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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
West Central Consercancy DistrictAvon5 MGD (million gallons per day)2022
KEOKUK WWTPKeokuk5 MGD (million gallons per day)2022
LIBERAL WWTPLiberal5 MGD (million gallons per day)2022
LAWRENCE - WAKARUSA WWTPLawrence5 MGD (million gallons per day)2022
LONDONLondon5 MGD (million gallons per day)2022
MOREHEAD STPMorehead5 MGD (million gallons per day)2022
GRETNA STPGretna5 MGD (million gallons per day)2022
ANSON-MADISON WWTFMadison5 MGD (million gallons per day)2022
Fairhaven Sewerage Collection System and WPCFFairhaven5 MGD (million gallons per day)2022
Gardner Sewerage Collection System and WPCFEast Templeton5 MGD (million gallons per day)2022
SO CLINTON WWTPDewitt5 MGD (million gallons per day)2022
OWATONNA WWTPOwatonna5 MGD (million gallons per day)2022
CLARKSDALE POTWClarksdale5 MGD (million gallons per day)2022
Liberty WWTPLiberty5 MGD (million gallons per day)2022
Sikeston WWTPSikeston5 MGD (million gallons per day)2022
DCSD Treatment Plant 1Saint Charles5 MGD (million gallons per day)2022
Merrimack WWTFMerrimack5 MGD (million gallons per day)2022
Ridgewood Village WPCF - CS/STPGlen Rock5 MGD (million gallons per day)2022
Millville City - CS/STPMillville5 MGD (million gallons per day)2022
Mount Holly MUA WPCF - Rancocas Creek STP/CSMount Holly5 MGD (million gallons per day)2022
New Windsor (T) SD#1-25 & STPNew Windsor5 MGD (million gallons per day)2022
Westchester (Co) Blind Brook SD STPRye5 MGD (million gallons per day)2022
TARBORO WWTPTarboro5 MGD (million gallons per day)2022
BELMONT WWTPBelmont5 MGD (million gallons per day)2022
ROXBORO WWTPRoxboro5 MGD (million gallons per day)2022
FOREST CITY WWTPForest City5 MGD (million gallons per day)2022
CLINTON WWTPClinton5 MGD (million gallons per day)2022
Ashland WWTP & Sewer SystemAshland5 MGD (million gallons per day)2022
Eastern Ohio Regional WW AuthorityBellaire5 MGD (million gallons per day)2022
Girard WWTP & Sewer SystemGirard5 MGD (million gallons per day)2022
Kent WWTP & Sewer SystemKent5 MGD (million gallons per day)2022
Lake Co Madison No. 1 WWTPMadison5 MGD (million gallons per day)2022
Mahoning Co Boardman WWTPYoungstown5 MGD (million gallons per day)2022
Mount Vernon WWTP & Sewer SystemMount Vernon5 MGD (million gallons per day)2022
Wadsworth WWTP & Sewer SystemWadsworth5 MGD (million gallons per day)2022
NEWBERG WYNOOSKI STREET STPNewberg5 MGD (million gallons per day)2022
CLARKS SUMMIT / S ABINGTON STPChinchilla5 MGD (million gallons per day)2022
SOUTH KINGSTOWN REG STPNarragansett5 MGD (million gallons per day)2022
BUCKSPORT WWTPConway5 MGD (million gallons per day)2022
LOWER REEDY RIVER PLANTGreenville5 MGD (million gallons per day)2022
HUMBOLDT STPHumboldt5 MGD (million gallons per day)2022
Spring Hill STPSpring Hill5 MGD (million gallons per day)2022
TULLAHOMA WWTPTullahoma5 MGD (million gallons per day)2022
Union City AC Strub WWTPUnion City5 MGD (million gallons per day)2022
Lakeview Regional WWTPLewisville5 MGD (million gallons per day)2022
ALLISON STP #1Corpus Christi5 MGD (million gallons per day)2022
Northwest Plant - LubbockLubbock5 MGD (million gallons per day)2022
Stewart Creek West WWTPWylie5 MGD (million gallons per day)2022
ALVIN WWTPAlvin5 MGD (million gallons per day)2022
Metro Central Regional WWTPHouston5 MGD (million gallons per day)2022
Northbelt Regional WWTPHumble5 MGD (million gallons per day)2022
Kleinwood Central WWTPHouston5 MGD (million gallons per day)2022
PARKINS MILLS WWTPWinchester5 MGD (million gallons per day)2022
JACKSON LAGOONJackson5 MGD (million gallons per day)2022
Upper Blue Sanitation DistrictBreckenridge4.99 MGD (million gallons per day)2022
SMITHFIELD REG WWTPSmithfield4.99 MGD (million gallons per day)2022
Georgia Street WWTPPort Neches4.98 MGD (million gallons per day)2022
POWELL LAGOONPowell4.96 MGD (million gallons per day)2022
HELENA WWTPHelena4.95 MGD (million gallons per day)2022
St. Augustine WWTF #1Saint Augustine4.95 MGD (million gallons per day)2022
Anastasia Island WWTFSaint Augustine4.95 MGD (million gallons per day)2022
MARION STPMarion4.95 MGD (million gallons per day)2022
MUNDELEIN STPLibertyville4.95 MGD (million gallons per day)2022
Lake Charles Plant DLake Charles4.95 MGD (million gallons per day)2022
Mason WWTP & Sewer SystemMason4.95 MGD (million gallons per day)2022
ABINGDON WWTP & Collection SystemAbingdon4.95 MGD (million gallons per day)2022
Marco Island WWTF & Reclaimed WaterMarco Island4.92 MGD (million gallons per day)2022
Dartmouth Sewerage Collection System and WPCFSouth Dartmouth4.92 MGD (million gallons per day)2022
Mendenhall Treatment PlantJuneau4.9 MGD (million gallons per day)2022
PASO ROBLES WWTPPaso Robles4.9 MGD (million gallons per day)2022
LOS BANOS WWTFLos Banos4.9 MGD (million gallons per day)2022
BRANFORD WPCFBranford4.9 MGD (million gallons per day)2022
Sycamore North WWTPSycamore4.9 MGD (million gallons per day)2022
CITY OF SULFUR SOUTH REGIONAL STPSulphur4.9 MGD (million gallons per day)2022
RIVERTON WWTPRiverton4.9 MGD (million gallons per day)2022
BIG BEAR AREA REG WWTFBig Bear City4.89 MGD (million gallons per day)2022
STEVENS POINT STPStevens Point4.89 MGD (million gallons per day)2022
BOAZ SLAB CREEK WWTPBoaz4.88 MGD (million gallons per day)2022
ROCHELLERochelle4.87 MGD (million gallons per day)2022
Ponderosa Central WWTPHouston4.87 MGD (million gallons per day)2022
DAVIE SYSTEM IIFort Lauderdale4.85 MGD (million gallons per day)2022
BOONE WWTPBoone4.82 MGD (million gallons per day)2022
Jasper Town Creek WWTPJasper4.8 MGD (million gallons per day)2022
SYLACAUGA J EARL HAM WWTPSylacauga4.8 MGD (million gallons per day)2022
Cherokee Metropolitan DistrictColorado Springs4.8 MGD (million gallons per day)2022
RCSD, Kimmswick WWTPKimmswick4.8 MGD (million gallons per day)2022
Massena (V) STPMassena4.8 MGD (million gallons per day)2022
HENDERSONVILLE WWTPHendersonville4.8 MGD (million gallons per day)2022
Athens WWTP & Sewer SystemAthens4.8 MGD (million gallons per day)2022
BJWSA/Port Royal Island WRFPort Royal4.8 MGD (million gallons per day)2022
Sevierville McCosky Is. STPSevierville4.8 MGD (million gallons per day)2022
Dickinson WWTP #1Dickinson4.8 MGD (million gallons per day)2022
CEDAR CITYCedar City4.8 MGD (million gallons per day)2022
Musconetcong SA CS/STPBudd Lake4.79 MGD (million gallons per day)2022
SAGINAW TWP STPSaginaw4.77 MGD (million gallons per day)2022
Rolla SE WWTPRolla4.765 MGD (million gallons per day)2022
CULLMAN WWTPCullman4.75 MGD (million gallons per day)2022
Prescott Airport WWTFPrescott4.75 MGD (million gallons per day)2022
WINTER GARDEN REG WWTPWinter Garden4.75 MGD (million gallons per day)2022
Northeast Regional WWTFDavenport4.75 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.