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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
Floyd Branch WWTPRichardson4.75 MGD (million gallons per day)2022
BENSENVILLE MAIN WWTP & COLL SYSTEMBensenville4.7 MGD (million gallons per day)2022
CRAWFORDSVILLE WWTPCrawfordsville4.7 MGD (million gallons per day)2022
Alexandria Lakes Area SDAlexandria4.7 MGD (million gallons per day)2022
Hampton WWTFHampton4.7 MGD (million gallons per day)2022
Dover WWTFDover4.7 MGD (million gallons per day)2022
ASHLEY VALLEY SMBVernal4.7 MGD (million gallons per day)2022
FRANKFORT WWTPFrankfort4.68 MGD (million gallons per day)2022
FRANKFORT WEST (REGIONAL) STPFrankfort4.67 MGD (million gallons per day)2022
CHARLES CITY WWTPCharles City4.66 MGD (million gallons per day)2022
MARSHFIELD WWTPMarshfield4.63 MGD (million gallons per day)2022
Monmouth, City ofMonmouth4.62 MGD (million gallons per day)2022
BUTTE-SILVER BOW CITY-COUNTYButte4.61 MGD (million gallons per day)2022
Hanover Township SA - CS/STPWhippany4.61 MGD (million gallons per day)2022
NEWBURGH WWTPNewburgh4.6 MGD (million gallons per day)2022
EMPORIA WWTPEmporia4.6 MGD (million gallons per day)2022
Livingston Township CS - STPLivingston4.6 MGD (million gallons per day)2022
Logan Co Indian Lake SSD WWTPRussells Point4.6 MGD (million gallons per day)2022
Watertown, City ofWatertown4.57 MGD (million gallons per day)2022
Weatherford WWTPWeatherford4.55 MGD (million gallons per day)2022
WESTBROOK WWTFWestbrook4.54 MGD (million gallons per day)2022
ELK RIVER WWTPElk River4.54 MGD (million gallons per day)2022
OXFORD TULL C ALLEN WWTPOxford4.5 MGD (million gallons per day)2022
TALLADEGA MAIN WWTPTalladega4.5 MGD (million gallons per day)2022
WETUMPKA WWTPWetumpka4.5 MGD (million gallons per day)2022
Pelham WWTPPelham4.5 MGD (million gallons per day)2022
Buckeye Central Beloat Wastewater PlantBuckeye4.5 MGD (million gallons per day)2022
Glendale Arrowhead Ranch WWRFGlendale4.5 MGD (million gallons per day)2022
BENICIA WWTFBenicia4.5 MGD (million gallons per day)2022
Barstow WRFBarstow4.5 MGD (million gallons per day)2022
Coachella WWTPCoachella4.5 MGD (million gallons per day)2022
SOUTH FORT COLLINS WWTPFort Collins4.5 MGD (million gallons per day)2022
MONTVILLE WPCFUncasville4.5 MGD (million gallons per day)2022
NORTH HAVEN WPCFNorth Haven4.5 MGD (million gallons per day)2022
JACKSONVILLE BEACH WWTFJacksonville Beach4.5 MGD (million gallons per day)2022
ROCKLEDGE WWTFRockledge4.5 MGD (million gallons per day)2022
Cocoa/Jerry Sellers WRFCocoa4.5 MGD (million gallons per day)2022
VERO BEACH WWTPVero Beach4.5 MGD (million gallons per day)2022
ZEPHYRHILLS WWTPZephyrhills4.5 MGD (million gallons per day)2022
Wilshire - Windsor WPCPSavannah4.5 MGD (million gallons per day)2022
Columbia County (Reed Creek WPC)Augusta4.5 MGD (million gallons per day)2022
DIXON SEWAGE TREATMENTDixon4.5 MGD (million gallons per day)2022
CARPENTERSVILLE WWTPCarpentersville4.5 MGD (million gallons per day)2022
LAKE IN THE HILLS Sanitary DistrictLake In The Hills4.5 MGD (million gallons per day)2022
AUBURN WWTPAuburn4.5 MGD (million gallons per day)2022
VERSAILLES STPVersailles4.5 MGD (million gallons per day)2022
CORBIN STPCorbin4.5 MGD (million gallons per day)2022
GEORGETOWN STP #1Georgetown4.5 MGD (million gallons per day)2022
MORGAN CITY SD #1 WWCTSMorgan City4.5 MGD (million gallons per day)2022
GARDINER WPCFGardiner4.5 MGD (million gallons per day)2022
HIBBING WWTPHibbing4.5 MGD (million gallons per day)2022
MARSHALL WWTFMarshall4.5 MGD (million gallons per day)2022
Jackson POTW - Trahon and Big CreekJackson4.5 MGD (million gallons per day)2022
FREMONT WWTPFremont4.5 MGD (million gallons per day)2022
RENO-STEAD WRFReno4.5 MGD (million gallons per day)2022
Caldwell Borough CS/STPCaldwell4.5 MGD (million gallons per day)2022
Medina (V) WWTP & PSMedina4.5 MGD (million gallons per day)2022
Erie (Co) SD#6 Lackawanna WWTPBuffalo4.5 MGD (million gallons per day)2022
CLARK CREEK WWTP (NEWTON)Newton4.5 MGD (million gallons per day)2022
ELIZABETH CITY WWTPElizabeth City4.5 MGD (million gallons per day)2022
MAYODAN WWTPMayodan4.5 MGD (million gallons per day)2022
SPINDALE WWTPSpindale4.5 MGD (million gallons per day)2022
JAMESTOWN WASTEWATERJamestown4.5 MGD (million gallons per day)2022
WILLISTON WASTEWATERWilliston4.5 MGD (million gallons per day)2022
Franklin Regional WWTPFranklin4.5 MGD (million gallons per day)2022
New Philadelphia WWTP & SewersNew Philadelphia4.5 MGD (million gallons per day)2022
Piqua WWTP & Sewer SystemPiqua4.5 MGD (million gallons per day)2022
Urbana WWTP & Sewer SystemUrbana4.5 MGD (million gallons per day)2022
Willard WWTP & Sewer SystemWillard4.5 MGD (million gallons per day)2022
MOORE WWTNorman4.5 MGD (million gallons per day)2022
Lakeland STPArlington4.5 MGD (million gallons per day)2022
LAWRENCEBURG WWTPLawrenceburg4.5 MGD (million gallons per day)2022
King's Creek WWTPTerrell4.5 MGD (million gallons per day)2022
Bellaire WWTPBellaire4.5 MGD (million gallons per day)2022
Kyle WWTPKyle4.5 MGD (million gallons per day)2022
FREDERICKSBURG STPFredericksburg4.5 MGD (million gallons per day)2022
ANACORTES STPAnacortes4.5 MGD (million gallons per day)2022
CHIPPEWA FALLS WWTPChippewa Falls4.5 MGD (million gallons per day)2022
ABERDEEN STPAberdeen4.485 MGD (million gallons per day)2022
Billerica Sewerage Collection System and WWTFBillerica4.46 MGD (million gallons per day)2022
Siloam Springs WWTPSiloam Springs4.4 MGD (million gallons per day)2022
LAFAYETTE STPLafayette4.4 MGD (million gallons per day)2022
Americus Mill Creek WPCPAmericus4.4 MGD (million gallons per day)2022
Kingsland WPCPKingsland4.4 MGD (million gallons per day)2022
VALPARAISO STPValparaiso4.4 MGD (million gallons per day)2022
SOMERSETSomerset4.4 MGD (million gallons per day)2022
ST. CHARLES EAST BANK STPDestrehan4.4 MGD (million gallons per day)2022
GRANDVILLE WWTPGrandville4.4 MGD (million gallons per day)2022
Asbury Park City - CS/STPAsbury Park4.4 MGD (million gallons per day)2022
Clermont Co O'Bannon Creek WWTPLoveland4.4 MGD (million gallons per day)2022
Coshocton WWTP & Sewer SystemCoshocton4.4 MGD (million gallons per day)2022
Victoria - Hand Rd WWTPVictoria4.4 MGD (million gallons per day)2022
SHERIDAN WWTPSheridan4.4 MGD (million gallons per day)2022
Belleville STP #2Belleville4.39 MGD (million gallons per day)2022
Newport WWTPNewport4.35 MGD (million gallons per day)2022
Still Creek WWTPBryan4.35 MGD (million gallons per day)2022
RANTOUL STPRantoul4.33 MGD (million gallons per day)2022
Montrose, City ofMontrose4.32 MGD (million gallons per day)2022
DECORAH WWTPDecorah4.32 MGD (million gallons per day)2022
LAKE STEVENS STPEverett4.32 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.