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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
ETOWAH STPEtowah1.2 MGD (million gallons per day)2022
MOUNTAIN CITY WWTPMountain City1.2 MGD (million gallons per day)2022
Hidalgo WWTPHidalgo1.2 MGD (million gallons per day)2022
Crystal City WWTPCrystal City1.2 MGD (million gallons per day)2022
Kaufman WWTPKaufman1.2 MGD (million gallons per day)2022
Decatur WWTPDecatur1.2 MGD (million gallons per day)2022
Squabble Creek WWTPRockwall1.2 MGD (million gallons per day)2022
Rusk WWTPRusk1.2 MGD (million gallons per day)2022
WEST ORANGE STPOrange1.2 MGD (million gallons per day)2022
Olde Oaks WWTPHouston1.2 MGD (million gallons per day)2022
Allen's Creek WWTPSealy1.2 MGD (million gallons per day)2022
Chimney Hill WWTPHouston1.2 MGD (million gallons per day)2022
Faulkey Gully WWTPCypress1.2 MGD (million gallons per day)2022
Paddock Ranch WWTPHouston1.2 MGD (million gallons per day)2022
Westlake MUD #1 WWTPHouston1.2 MGD (million gallons per day)2022
Dove Meadows Regional WWTPHouston1.2 MGD (million gallons per day)2022
Boerne WWTPBoerne1.2 MGD (million gallons per day)2022
PAROWANParowan1.2 MGD (million gallons per day)2022
Burlington East WWTFBurlington1.2 MGD (million gallons per day)2022
Newport City WWTFNewport1.2 MGD (million gallons per day)2022
CHEWELAH S/T FACILITYChewelah1.2 MGD (million gallons per day)2022
ORTING S/T FACILITYOrting1.2 MGD (million gallons per day)2022
SHELTON STPShelton1.2 MGD (million gallons per day)2022
BLUEFIELD - ADA WWTPBluefield1.2 MGD (million gallons per day)2022
FRANKFORT PSD - REGIONAL WWTPRidgeley1.2 MGD (million gallons per day)2022
SHADY SPRING PSD - GLEN MORGAN TPBeaver1.2 MGD (million gallons per day)2022
WHITEHALL WWTPWhitehall1.2 MGD (million gallons per day)2022
NORTH LIBERTY WWTPNorth Liberty1.19 MGD (million gallons per day)2022
Annandale Maple Lake Joint WWTPAnnandale1.184 MGD (million gallons per day)2022
Gustine WWTFGustine1.18 MGD (million gallons per day)2022
CHESAPEAKE BEACH WWTPChesapeake Beach1.18 MGD (million gallons per day)2022
Lenox Sewerage Collection System and WWTFLenox Dale1.18 MGD (million gallons per day)2022
HARTLAND TWP. CSHartland1.18 MGD (million gallons per day)2022
Hallettsville WWTPHallettsville1.18 MGD (million gallons per day)2022
DYERSVILLE WWTPDyersville1.179 MGD (million gallons per day)2022
Sherwood - North WWTPSherwood1.175 MGD (million gallons per day)2022
Box Elder Sanitary Sewer CollectionBox Elder1.175 MGD (million gallons per day)2022
PAYNESVILLE WWTPPaynesville1.174 MGD (million gallons per day)2022
PANA STPPana1.17 MGD (million gallons per day)2022
GALENA STPGalena1.17 MGD (million gallons per day)2022
SANTA CLAUS WWTPSanta Claus1.17 MGD (million gallons per day)2022
LAMAR WWTPLamar1.16 MGD (million gallons per day)2022
Ashburn WPCPAshburn1.16 MGD (million gallons per day)2022
DEVILS LAKE WASTEWATERDevils Lake1.16 MGD (million gallons per day)2022
MONACA BORO STPMonaca1.16 MGD (million gallons per day)2022
Chatham Township - CS/STPChatham1.155 MGD (million gallons per day)2022
LEADVILLE WWTPLeadville1.15 MGD (million gallons per day)2022
Millsboro State Street STPMillsboro1.15 MGD (million gallons per day)2022
Tybee Island WPCPTybee Island1.15 MGD (million gallons per day)2022
MANTENO, VILLAGE OFManteno1.15 MGD (million gallons per day)2022
Boonville (V) STPBoonville1.15 MGD (million gallons per day)2022
Springville (V) WWTPSpringville1.15 MGD (million gallons per day)2022
WINDSOR WWTPWindsor1.15 MGD (million gallons per day)2022
City of Clemson, Cochran WWTPClemson1.15 MGD (million gallons per day)2022
HEARNE STPHearne1.15 MGD (million gallons per day)2022
BRADLEY PSD WWTPBradley1.15 MGD (million gallons per day)2022
RODEO WWTFRodeo1.14 MGD (million gallons per day)2022
BUHL SEWAGE LAGOONBuhl1.14 MGD (million gallons per day)2022
MONTICELLO WWTPMonticello1.14 MGD (million gallons per day)2022
TIPTON WWTP (West)Tipton1.14 MGD (million gallons per day)2022
Columbiana Co Elkton Regional WWTPLisbon1.14 MGD (million gallons per day)2022
BURNS STPHines1.14 MGD (million gallons per day)2022
NEW HOLLAND BORO STPNew Holland1.14 MGD (million gallons per day)2022
Blythe Regional WWTFBlythe1.138 MGD (million gallons per day)2022
WOOD DALE SOUTH STPWood Dale1.13 MGD (million gallons per day)2022
FLEMINGSBURG STPFlemingsburg1.13 MGD (million gallons per day)2022
Kearney WWTPKearney1.13 MGD (million gallons per day)2022
Windsor Main WWTFWindsor1.13 MGD (million gallons per day)2022
Smithville WWTPSmithville1.125 MGD (million gallons per day)2022
Sunbury WWTP & Collection SystemSunbury1.125 MGD (million gallons per day)2022
BASEHOR WWTPBasehor1.12 MGD (million gallons per day)2022
WHITEWATER RIVER REGIONAL WWTFSaint Charles1.12 MGD (million gallons per day)2022
CUSHING WWTCushing1.12 MGD (million gallons per day)2022
HEMPFIELD TWP MA - DARRAGH STPDarragh1.12 MGD (million gallons per day)2022
Colorado City WWTPColorado City1.12 MGD (million gallons per day)2022
Winnsboro WWTPWinnsboro1.12 MGD (million gallons per day)2022
ORANGE STPOrange1.12 MGD (million gallons per day)2022
WELCH WWTPHemphill1.12 MGD (million gallons per day)2022
MAYVILLE STPMayville1.12 MGD (million gallons per day)2022
CHARITON WWTPChariton1.115 MGD (million gallons per day)2022
HUNTINGBURG WWTPHuntingburg1.114 MGD (million gallons per day)2022
STEWARTVILLE WWTPStewartville1.111 MGD (million gallons per day)2022
AVENAL WWTFAvenal1.11 MGD (million gallons per day)2022
FORD CITY STPFord City1.11 MGD (million gallons per day)2022
SIBLEY WWTPSibley1.104 MGD (million gallons per day)2022
Fountain/Holman Correctional FacilityAtmore1.1 MGD (million gallons per day)2022
Ashdown WWTPAshdown1.1 MGD (million gallons per day)2022
Stonegate Village Metropolitan DistrictParker1.1 MGD (million gallons per day)2022
Copper Mountain Consolidated MDFrisco1.1 MGD (million gallons per day)2022
JEWETT CITY WPCFJewett City1.1 MGD (million gallons per day)2022
Mary Esther WWTPMary Esther1.1 MGD (million gallons per day)2022
GRACEVILLE AWTFGraceville1.1 MGD (million gallons per day)2022
WAIMANALO WWTFWaimanalo1.1 MGD (million gallons per day)2022
CREVE COEUR STPCreve Coeur1.1 MGD (million gallons per day)2022
SPRING VALLEY STPSpring Valley1.1 MGD (million gallons per day)2022
ROCKVILLE WWTPRockville1.1 MGD (million gallons per day)2022
TOLEDO WWTPToledo1.1 MGD (million gallons per day)2022
PRATT WWTPPratt1.1 MGD (million gallons per day)2022
Greenup Joint Sewer AgencyGreenup1.1 MGD (million gallons per day)2022
Ellsworth WWTFEllsworth1.1 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.