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
WILTON WWTPHW:39521	532 population served	2012
NOTUS SEWAGE TREATMENT SYSTEMHW:27392	531 population served	2012
FORDSVILLE STPHW:29968	531 population served	2012
FOLSOM STPHW:30130	531 population served	2012
BENNET WWTPHW:32695	531 population served	2012
PLYMOUTH WWTPHW:32996	531 population served	2012
Hague T STP and On Site SystemsHW:33829	531 population served	2012
WYNONA MA WWTHW:35688	531 population served	2012
VESPER STPHW:39491	531 population served	2012
BAYARD WWTPHW:28509	530 population served	2012
WHITTEMORE WWTPHW:29138	530 population served	2012
Belmont Co Pennwood Estates WWTPHW:34989	530 population served	2012
CEMENT PWA WWTHW:35601	530 population served	2012
GRADY COUNTY RWD 2 AMBERHW:35810	530 population served	2012
Lolita WWTPHW:37684	530 population served	2012
TROPICHW:38166	530 population served	2012
OTHO STLHW:28945	529 population served	2012
RICHARDTON LAGOONHW:34480	529 population served	2012
Julian Water Pollution Control FacHW:26242	528 population served	2012
BLOOMINGDALE STPHW:31047	528 population served	2012
Stark Co Dee Mar Allotment WWTPHW:35499	528 population served	2012
CLINTONVILLE BORO STPHW:36932	528 population served	2012
SUPERIOR VILLAGE STPHW:39471	528 population served	2012
HULLS COVE STPHW:30404	527 population served	2012
CLARKS WWTPHW:32742	527 population served	2012
EUREKA WWTFHW:33118	527 population served	2012
Sharon Springs V WWTPHW:33738	527 population served	2012
ELDORADO WWTHW:35839	527 population served	2012
MCKENNY SEWAGE TREAT PLNTHW:38444	527 population served	2012
Playa Santa WWTPHW:39778	527 population served	2012
OCEANA MARIN WWTFHW:25863	526 population served	2012
ELLSWORTH WWTPHW:28662	526 population served	2012
ODESSA W WWTPHW:31769	526 population served	2012
DILL CITY WWTHW:36015	526 population served	2012
LYNDON STATION STPHW:39304	526 population served	2012
Bellamy LagoonHW:25233	525 population served	2012
Manzanola Town ofHW:26498	525 population served	2012
OCEA Country Village WWTPHW:30069	525 population served	2012
Lewis Co SD 1 Tollesboro WWTPHW:30087	525 population served	2012
Shirley Dept of Public WorksHW:30810	525 population served	2012
WEIR POTWHW:31651	525 population served	2012
ACHILLE PUA WWTHW:35734	525 population served	2012
KLICKITAT STPHW:38769	525 population served	2012
IRON RIVER SD 1 STPHW:39563	525 population served	2012
WYOMING WWTPHW:29152	524 population served	2012
OAKLAND POTWHW:31562	524 population served	2012
ESSEX WWTPHW:32130	524 population served	2012
JAMESPORT WWTPHW:32249	524 population served	2012
CANUTE WWTHW:36013	524 population served	2012
CONCONULLY S_T FACHW:38696	524 population served	2012
PAW PAW WWTPHW:38950	524 population served	2012
HATLEY STPHW:39058	524 population served	2012
CLERMONT WWTPHW:29159	523 population served	2012
MILTONVALE WWTPHW:29648	523 population served	2012
EAGLE BEND STPHW:31324	523 population served	2012
CARY POTWHW:31417	523 population served	2012
ST JOHN S_T FACILITYHW:38745	523 population served	2012
Lauramie Township RSD WWTPHW:28410	522 population served	2012
RICHLAND WWTPHW:28997	522 population served	2012
EOLIA WWTPHW:32226	522 population served	2012
PALMYRA WWTPHW:32905	522 population served	2012
Fieldsboro STP and CSHW:33372	522 population served	2012
McGuffey WWTP and Sewer SystemHW:34910	522 population served	2012
WALNUT GROVE WWTPHW:31852	521 population served	2012
LEOLA STPHW:37307	521 population served	2012
FLEMINGTON WWTPHW:39013	521 population served	2012
COMFREY STPHW:31332	520 population served	2012
VERDIGRE WWTPHW:33065	520 population served	2012
ANSLEY WWTPHW:33093	520 population served	2012
DANBURY WWTPHW:34394	520 population served	2012
Kirkersville WWTP and Sewer SystemHW:34790	520 population served	2012
SHIDLER WWTHW:35687	520 population served	2012
ARNETT WWTHW:35786	520 population served	2012
HUNTINGTON STPHW:36136	520 population served	2012
Goree WWTPHW:37712	520 population served	2012
MELROSE WWTPHW:39323	520 population served	2012
NESHKORO WWTPHW:39350	520 population served	2012
East Central Harrison Co PUDHW:31496	519 population served	2012
LEIGH WWTPHW:32892	519 population served	2012
LEWISTON WOODVILLE WWTPHW:34142	519 population served	2012
HAMILTON WWTPHW:34307	519 population served	2012
Emmet WWTPHW:25692	518 population served	2012
MAYNARD WWTPHW:29162	518 population served	2012
HESPERIA STPHW:30875	518 population served	2012
Glenville T Alphaus STPHW:33729	518 population served	2012
PRAIRIE FARM STPHW:39404	518 population served	2012
Bear River LagoonHW:39672	518 population served	2012
HAMILTON WPCPHW:27219	517 population served	2012
MACKAY SEWAGE LAGOONHW:27486	517 population served	2012
KENNARD STPHW:28269	517 population served	2012
DELMAR STLHW:28618	517 population served	2012
KEOTA PWA WWTHW:35827	517 population served	2012
Wilson WWTPHW:37723	517 population served	2012
DILLWYN STPHW:38380	517 population served	2012
McNeil WWTPHW:25520	516 population served	2012
Rosholt STPHW:39432	516 population served	2012
LEARY WPCPHW:27072	515 population served	2012
Pavilion T Prop STP and OnsitesHW:34031	515 population served	2012
HERRICK TWP STPHW:36469	515 population served	2012
CANAAN VALLEY PSD NORTH LAKE WWTPHW:39018	515 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.