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
Atkins South WWTPHW:25710	322 population served	2012
AUBURN STLHW:28496	322 population served	2012
FARBER WWTPHW:32372	322 population served	2012
Catawba WWTP and Sewer SystemHW:35028	322 population served	2012
TEMPLETON WWTPHW:29076	321 population served	2012
DEER CREEK STPHW:31293	321 population served	2012
BLOOMSDALE WPC PLANTHW:32399	321 population served	2012
SPENCER MOUNTAIN WWTPHW:34236	321 population served	2012
SHADE GAP AREA JOINT MUN AUTHHW:36655	321 population served	2012
DINOSAUR WWTPHW:26383	320 population served	2012
Aspen Village MDHW:26489	320 population served	2012
BRANDON WWTPHW:28530	320 population served	2012
LYTTON WWTPHW:28836	320 population served	2012
MINDEN CITY STPHW:30951	320 population served	2012
ROCKPORT I 29 WWTPHW:31990	320 population served	2012
Annsville T Taberg STP and OnsitesHW:33899	320 population served	2012
DIBBLE WWTHW:35884	320 population served	2012
RATTAN WWTHW:35968	320 population served	2012
Vanderbilt WWTPHW:37685	320 population served	2012
Malone WWTPHW:37785	320 population served	2012
Mount Calm WWTPHW:37789	320 population served	2012
Piedmont STPHW:38336	320 population served	2012
WYATT WWTPHW:32109	319 population served	2012
Bliss Sewage LagoonsHW:27506	318 population served	2012
MERCER WWTPHW:32265	318 population served	2012
CHAPMAN WWTPHW:32739	318 population served	2012
MORRISON NORTH WWTHW:35922	318 population served	2012
MORRISON SOUTH WWTHW:35923	318 population served	2012
PRINCETON WWTPHW:29504	317 population served	2012
DONAHUE WWTPHW:28630	316 population served	2012
EAGLEVILLE WWTPHW:32229	316 population served	2012
PHILLIPS WWTPHW:32989	316 population served	2012
Troy Township Wastewater DistrictHW:35537	316 population served	2012
Blevins WWTPHW:25565	315 population served	2012
CUSTER STPHW:31036	315 population served	2012
BASSFIELD POTWHW:31387	315 population served	2012
MAXWELL WWTPHW:32925	315 population served	2012
MILLIGAN WWTPHW:33029	315 population served	2012
Allen Co Westminster WWTPHW:34799	315 population served	2012
Gallia Co Meadowlook WWTPHW:35121	315 population served	2012
MARKLESBURG AUTHHW:36982	315 population served	2012
CUMBERLAND CITY LAGOONHW:37359	315 population served	2012
LaCrosse Wastewater FacilityHW:38717	315 population served	2012
Catawba Kennan Joint SC STPHW:39277	315 population served	2012
CAROLINE SD 1 STPHW:39531	315 population served	2012
KELLERTON WWTPHW:28772	314 population served	2012
EVEREST WWTPHW:29361	314 population served	2012
ST MARTIN STPHW:31275	314 population served	2012
MORGAN CITY WATER and SEWER ASSOCHW:31548	314 population served	2012
PARADISE VALLEY SEWER DISTRICHW:33106	314 population served	2012
CONEMAUGH TWP BENSON STPHW:36659	314 population served	2012
COMA PSD HOLLY HILLS WWTPHW:38996	314 population served	2012
ROCKDALE COHONEY CREEKHW:27173	313 population served	2012
COURTLAND WWTPHW:29454	313 population served	2012
GRANVILLE WWTPHW:28717	312 population served	2012
MONTOUR STLHW:28890	312 population served	2012
NATOMA WWTPHW:29615	312 population served	2012
AMAZONIA WWTPHW:31991	312 population served	2012
LAWRENCE WWTPHW:32891	312 population served	2012
CAMERON PWA WWTHW:35622	312 population served	2012
ETHAN Town ofHW:37297	312 population served	2012
LELAND WWTPHW:28806	311 population served	2012
INGALLS WWTPHW:29716	311 population served	2012
ASKOV WWTPHW:31344	311 population served	2012
LEWIS CO STP 2HW:38768	311 population served	2012
RODESSA STPHW:30188	310 population served	2012
UNION WWTPHW:32946	310 population served	2012
Stockport T Kings Acres STPHW:33714	310 population served	2012
GACKLE LAGOONHW:34497	310 population served	2012
Williamsburg On The River WWTPHW:35519	310 population served	2012
LONGDALE WWTHW:35732	310 population served	2012
MANILAHW:38186	310 population served	2012
DOWNSVILLE SD 1 STPHW:39573	310 population served	2012
Windsor Place WWTPHW:32450	309 population served	2012
LEMON COVE WWTFHW:26130	308 population served	2012
MCCAUSLAND WWTPHW:28838	308 population served	2012
SCOTIA WWTPHW:33020	308 population served	2012
MEDINA LAGOONHW:34630	308 population served	2012
Guernsey Co Mental Health Center WWTPHW:35160	308 population served	2012
PARKER WWTPHW:29500	307 population served	2012
MONROE WWTPHW:32873	307 population served	2012
LOUISVILLE LAGOONHW:25192	306 population served	2012
RUNNELLS STPHW:29014	306 population served	2012
VOLGA CITY WWTPHW:29102	306 population served	2012
BALDWIN WWTPHW:29195	306 population served	2012
WESTERN WWTPHW:33080	306 population served	2012
Castorland V WWTPHW:33856	306 population served	2012
Eldred TownshipHW:37045	306 population served	2012
ELK CITY WWTPHW:29771	305 population served	2012
BOSWORTH WWTPHW:32110	305 population served	2012
HOLBROOK WWTPHW:32724	305 population served	2012
Galena WWTP and Sewer SystemHW:35119	305 population served	2012
BUFFALO TWP MAZEPPA STPHW:36670	305 population served	2012
FRIENDLY PSD BENS RUN WWTPHW:39020	305 population served	2012
HAWKINS WWTPHW:39246	305 population served	2012
RIVERTON WWTPHW:29003	304 population served	2012
BRADFORDSVILLE STPHW:29936	304 population served	2012
GREENRIDGE FORESTRY CAMPHW:30661	304 population served	2012
MARTINSBURG WWTPHW:32373	304 population served	2012
Defiance Co Evansport WWTP and Sewer SystemHW:34945	304 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.