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
ARCADIA STLHW:28487	483 population served	2012
JEWELL WWTPHW:29456	483 population served	2012
NEELYVILLE WWTPHW:31829	483 population served	2012
DREXEL NORTH WWTPHW:31911	483 population served	2012
CHAMOIS WWTPHW:32440	483 population served	2012
RICHFIELD LAGOONSHW:27391	482 population served	2012
ROLLA WWTPHW:29343	482 population served	2012
BIRD CITY WWTPHW:29755	482 population served	2012
MARENISCO TWP STPHW:31133	482 population served	2012
DREXEL SOUTH LAGOONHW:31910	482 population served	2012
FREEMAN WWTPHW:31913	482 population served	2012
GERLACH GIDHW:33128	482 population served	2012
SOUTH PRAIRIE AREAHW:38636	482 population served	2012
RINGSTEAD WWTPHW:29000	481 population served	2012
Alexandra V WWTPHW:33976	481 population served	2012
PETERS TWP UPTON STPHW:36575	481 population served	2012
MUD LAKE STPHW:27517	480 population served	2012
COLUMBIA SEWERAGE SYSTEMHW:30120	480 population served	2012
HORNBECK WWCTSHW:30331	480 population served	2012
GALENA WWTPHW:30686	480 population served	2012
KINDE WWSLHW:30867	480 population served	2012
OSYKA POTWHW:31565	480 population served	2012
PALMER WWTPHW:32985	480 population served	2012
Carmel T SD 7 STP Country ManorHW:33642	480 population served	2012
Parish V STPHW:33953	480 population served	2012
Geauga Co Aquilla WWTPHW:34879	480 population served	2012
Clermont Co Indian Lookout WWTPHW:35046	480 population served	2012
ARARAT TWPHW:36475	480 population served	2012
Bay City STPHW:39096	480 population served	2012
HANCOCK WWTPHW:39243	480 population served	2012
LAKEWOOD SD 1 STPHW:39292	480 population served	2012
Crawfordsville WWTPHW:25536	479 population served	2012
PEWAMO WWTPHW:31075	479 population served	2012
STRATTON WWTPHW:33043	479 population served	2012
FESSENDEN LAGOONHW:34574	479 population served	2012
STONY CREEK STPHW:38509	479 population served	2012
ELCHO SD 1 STPHW:39641	479 population served	2012
KANDIYOHI STPHW:31352	478 population served	2012
Russellville WWTP and Sewer SystemHW:34748	478 population served	2012
Jeromesville WWTP and Sewer SystemHW:34922	478 population served	2012
ENTERPRISE POTWHW:31467	477 population served	2012
SALEMBURG WWTPHW:34385	477 population served	2012
WETUMKA WWT NORTHHW:35836	477 population served	2012
MILLRY LAGOONHW:25197	476 population served	2012
GEORGETOWN S_T FACILITYHW:27476	476 population served	2012
DOON STLHW:28632	476 population served	2012
GREEN RIDGE WWTPHW:31838	476 population served	2012
LACEYVILLE BORO JMA STPHW:36456	476 population served	2012
REDDING GEORGETOWN WPCFHW:26590	475 population served	2012
OCHLOCKNEE WPCPHW:27266	475 population served	2012
DANFORTH WWTFHW:30479	475 population served	2012
CECILTON WWTPHW:30554	475 population served	2012
FAIR PLAY WWTPHW:32412	475 population served	2012
Ulster T Whitter SD WWTPHW:33684	475 population served	2012
Colton T SD1 STP and On SitesHW:33874	475 population served	2012
NYSDOC Georgetown Corr FacSTPHW:33969	475 population served	2012
JAMESVILLE WWTPHW:34305	475 population served	2012
ARGUSVILLE LAGOONHW:34466	475 population served	2012
WILKESON STPHW:38680	475 population served	2012
COWDEN STPHW:27872	474 population served	2012
QUEEN CITY WWTPHW:31797	474 population served	2012
Neponset WastewaterHW:27829	473 population served	2012
MACKINAC ISLAND STPHW:31152	473 population served	2012
HAMLIN TWP STPHW:37007	473 population served	2012
CRUGER POTWHW:31442	472 population served	2012
Beaverdam WWTP and Sewer SystemHW:34982	472 population served	2012
Fort Jennings WWTP and Sewer SystemHW:35107	472 population served	2012
Monte Vista City ofHW:26462	471 population served	2012
Helmsburg RSD WWTPHW:28211	471 population served	2012
EARLING WWTPHW:28884	471 population served	2012
KISMET WWTPHW:29331	471 population served	2012
Ravenden WWTPHW:25653	470 population served	2012
Millington_Sandfield WWTPHW:30676	470 population served	2012
Grandfalls WWTPHW:37598	470 population served	2012
BRUCEVILLE STPHW:28292	469 population served	2012
STACYVILLE WWTPHW:29054	469 population served	2012
DELPHOS WWTPHW:29674	469 population served	2012
CALHOUN WWTPHW:31844	469 population served	2012
EUSTIS WWTPHW:32797	469 population served	2012
South Vienna WWTP and Sewer SystemHW:35420	469 population served	2012
Tuppers Plains Regional Sewer District WWTP and SewersHW:35444	469 population served	2012
HAMMON WWTHW:35597	469 population served	2012
ELLENBORO_LAMBERTON PSD WWTPHW:39007	469 population served	2012
Gibbsville SD STPHW:39608	469 population served	2012
DUDLEY OXIDATION PONDHW:27191	468 population served	2012
QUENEMO WWTPHW:29502	468 population served	2012
D LO POTWHW:31457	468 population served	2012
NEWBURG WWTPHW:32346	468 population served	2012
DRY TAVERN STPHW:36837	468 population served	2012
LINGLE LAGOONHW:39692	468 population served	2012
BYROMVILLE PONDHW:27050	467 population served	2012
BREDA WWTPHW:28532	467 population served	2012
LOST NATION STLHW:28828	467 population served	2012
MARTENSDALE WWTPHW:28861	467 population served	2012
SILVER CITY POTWHW:31703	467 population served	2012
HERMITAGE WWTPHW:32389	467 population served	2012
KENDALL STPHW:39276	467 population served	2012
Jasper WWTPHW:25694	466 population served	2012
SANDBORN WWTPHW:28294	466 population served	2012
ROYAL WSPHW:29184	466 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.