World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in the United States

14,626 inventory records · HydroWASTE v1.0 / United States

Data years: 2008, 2012. The inventory date does not establish current operation.

States

14,626 results

Name	Native size	Year
CLEMSTONE SEWER DISTRICT WWTFHW:31859	227 population served	2012
WYACONDA WWTPHW:32321	227 population served	2012
ANAMOOSE LAGOONHW:34524	227 population served	2012
PENN TWP COVE WWTPHW:36555	227 population served	2012
SCHUYLER STPHW:38333	227 population served	2012
Arriba Town OfHW:26483	226 population served	2012
CASTLEFORD STPHW:27520	226 population served	2012
LINDEN WWTPHW:28815	226 population served	2012
TYRO WWTPHW:29787	226 population served	2012
NORTHROP STPHW:31308	226 population served	2012
SILEX WWTPHW:32292	226 population served	2012
WYNOT WWTPHW:32687	226 population served	2012
ACOMA PUEBLO LAGOONHW:33480	226 population served	2012
FERRYVILLE WWTPHW:39219	226 population served	2012
Griffithville WWTPHW:25757	225 population served	2012
Geyla Mannor Wastewater PlantHW:26061	225 population served	2012
PORTSMOUTH STLHW:28973	225 population served	2012
LINCOLNVILLE WWTPHW:29579	225 population served	2012
PALCO WWTPHW:29692	225 population served	2012
AURORA PARK SUBDIVISIONHW:30365	225 population served	2012
LULA POTWHW:31530	225 population served	2012
SKIDMORE WWTPHW:31976	225 population served	2012
CURRYVILLE WWTPHW:32215	225 population served	2012
GUIDE ROCK WWTPHW:32835	225 population served	2012
HAIGLER WWTPHW:32838	225 population served	2012
ALTAMONTHW:38187	225 population served	2012
CAPON BRIDGE WWTPHW:38850	225 population served	2012
MARSHALL CO SD FORT CLARK WWTPHW:38912	225 population served	2012
CRYSTAL LAKE SD STP BarronHW:39167	225 population served	2012
LUCAS WWTPHW:28833	224 population served	2012
Newark STPHW:30645	224 population served	2012
MINNEWAUKAN LAGOONHW:34635	224 population served	2012
Williams Co Lakeland Woods WWTPHW:34731	224 population served	2012
NASH PWA WWTHW:35815	224 population served	2012
DOUGHERTY WWTHW:35913	224 population served	2012
BROKAW WWTPHW:39127	224 population served	2012
RADISSON STPHW:39409	224 population served	2012
Fisher WWTPHW:25703	223 population served	2012
TIPTON WWTPHW:29698	223 population served	2012
KNOX CITY WWTPHW:32036	223 population served	2012
NEW CAMBRIA WWTPHW:32329	223 population served	2012
GASCONADE WWTPHW:32436	223 population served	2012
DWIGHT WWTPHW:32783	223 population served	2012
FARNAM WWTPHW:32807	223 population served	2012
LEONARD LAGOONHW:34459	223 population served	2012
ALEXANDER LAGOONHW:34521	223 population served	2012
Pollard WWTPHW:25511	222 population served	2012
HORNICK SEWAGE LAGOONHW:28748	222 population served	2012
ANETA LAGOONHW:34501	222 population served	2012
HOPEWELL BORO STPHW:36542	222 population served	2012
ELWOOD COMMUNITY SDHW:28663	221 population served	2012
GOOSE LAKE STLHW:28708	221 population served	2012
PULASKI WWTPHW:28982	221 population served	2012
LOUISVILLE WWTPHW:29373	221 population served	2012
BRUNSWICK WWTPHW:32710	221 population served	2012
WACO WWTPHW:33066	221 population served	2012
Troupsburg T PropSTP and OnsitesHW:34041	221 population served	2012
COLERAIN WWTPHW:34140	221 population served	2012
NEW LEIPZIG LAGOONHW:34645	221 population served	2012
STONE LAKE STPHW:39614	221 population served	2012
Pinal County Eleven Mile Corner Rd WWTPHW:25403	220 population served	2012
LOG CABIN RANCH WWTFHW:25884	220 population served	2012
Iliff Town ofHW:26481	220 population served	2012
BLOCKTON WWTPHW:28521	220 population served	2012
CUSHING WWTPHW:28604	220 population served	2012
Eastern WWTPHW:30083	220 population served	2012
Cheltenham WWTPHW:30666	220 population served	2012
HOUSTONIA WWTPHW:32038	220 population served	2012
LINN CREEK WWTPHW:32339	220 population served	2012
STOTTS CITY WWTFHW:32452	220 population served	2012
HADAR WWTPHW:32837	220 population served	2012
Rensselaer Falls V STPHW:33891	220 population served	2012
Holmes Co Mount Hope WWTP and SewersHW:34739	220 population served	2012
Trumbull Co Bazetta 1 WWTPHW:35459	220 population served	2012
STUART WWTHW:35834	220 population served	2012
ROBINSON TWP MA R GARDENHW:36825	220 population served	2012
FAIRVIEW BORO STPHW:36995	220 population served	2012
Orchard Manor Nursing Home STPHW:39632	220 population served	2012
BRADDYVILLE WWTPHW:28529	219 population served	2012
CLUTIER STLHW:28579	219 population served	2012
BATES CITY WWTPHW:32176	219 population served	2012
HANKSVILLEHW:38204	219 population served	2012
WALNUT WWTPHW:29606	218 population served	2012
MILAN SD STPHW:39591	218 population served	2012
Corunna WWTPHW:28419	217 population served	2012
Moro WWTPHW:25658	216 population served	2012
Russell WWTPHW:25764	216 population served	2012
ONSLOW WWTPHW:28937	216 population served	2012
JF CO S D 5 WWTP HICKORY ACRESHW:29421	216 population served	2012
ARROW ROCK WWTPHW:31994	216 population served	2012
San Jon Village ofHW:33458	216 population served	2012
WIMBLEDON LAGOONHW:34709	216 population served	2012
Cecil WWTP and Sewer SystemHW:34966	216 population served	2012
HOLLAND WWTPHW:28744	215 population served	2012
HUDSON WWTPHW:29257	215 population served	2012
LEHIGH WWTPHW:29578	215 population served	2012
HILLVIEW ACRES SUBDHW:31933	215 population served	2012
HAMILTON WWTP SWHW:32382	215 population served	2012
ENCINAL VILLAGE PONDHW:33483	215 population served	2012
SENECA STPHW:36183	215 population served	2012

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.

US EPA · NPDES Permit Basics

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.