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
RANCHESTER LAGOONHW:39712	855 population served	2012
INKOM S_T FACILITYHW:27473	854 population served	2012
LE GRAND STLHW:28804	854 population served	2012
NEWHALL WWTPHW:28913	854 population served	2012
NEW FLORENCE WWTPHW:31801	854 population served	2012
NASHVILLE WWTPHW:28210	853 population served	2012
RINGTOWN STPHW:37025	853 population served	2012
BEAR RIVERHW:38183	853 population served	2012
Eagle Nest Village ofHW:33428	852 population served	2012
Silverton Town ofHW:26500	850 population served	2012
Fairways MDHW:26507	850 population served	2012
BELLEVILLE WWTPHW:28265	850 population served	2012
JACKSON CO RSD WWTPHW:28281	850 population served	2012
Van Bibber Lake CDHW:28441	850 population served	2012
WINTHROP STPHW:29146	850 population served	2012
BEDFORD STPHW:29929	850 population served	2012
West Milford Township Birch Hill CS_STPHW:33261	850 population served	2012
Marlborough T Marlboro STPHW:33674	850 population served	2012
Geauga Co Infirmary Creek WWTPHW:35138	850 population served	2012
GORE WWTHW:35635	850 population served	2012
CULVER STPHW:36109	850 population served	2012
PENN TWP CHESTER STPHW:36987	850 population served	2012
Lynchburg WWTPHW:37440	850 population served	2012
Rankin WWTPHW:37612	850 population served	2012
Bertram WWTPHW:37766	850 population served	2012
Montgomery WWTPHW:38022	850 population served	2012
Chateau Woods WWTPHW:38039	850 population served	2012
Martindale WWTPHW:38085	850 population served	2012
Bluffview Sanitary District STPHW:39122	850 population served	2012
NEW HAVEN STPHW:30024	849 population served	2012
Suffolk Co SCSD23 Coventry ManorHW:33537	849 population served	2012
Highland WWTPHW:25453	848 population served	2012
Cochecton T Lake Huntington STPHW:33653	848 population served	2012
SHADY POINT PWA WWTHW:35626	848 population served	2012
WRIGHT CITY WWTHW:35892	848 population served	2012
ARENDTSVILLE MUN AUTHHW:36515	848 population served	2012
LAKE FLOYD PSD WWTPHW:38869	848 population served	2012
Magazine WWTPHW:25667	847 population served	2012
Rockland T Roscoe STPHW:33664	847 population served	2012
GREENLEAF STPHW:27441	846 population served	2012
SHERIDAN SD WWTPHW:27771	846 population served	2012
CARTHAGE WWTPHW:28357	846 population served	2012
LYNNVILLE WWTPHW:28109	845 population served	2012
AFTON CITY OF STPHW:28462	845 population served	2012
HUBBARD LAGOONHW:28751	845 population served	2012
PERRY WWTPHW:29392	845 population served	2012
THOREAU LAGOONSHW:33452	845 population served	2012
Suffolk Co SCSD 9 COLLEGE PARKHW:33541	845 population served	2012
GARBER WWTHW:35588	845 population served	2012
ALEPPO TWP AUTH I 79 STPHW:36849	845 population served	2012
CHEROKEE COUNTY WWTPHW:25184	844 population served	2012
Norphlet WWTPHW:25748	844 population served	2012
Baltic WWTP and Sewer SystemHW:34743	844 population served	2012
ALEXIS STPHW:27553	843 population served	2012
FRANKLINVILLE WWTPHW:34358	843 population served	2012
Adams County Water DistrictHW:27832	842 population served	2012
DARLINGTON WWTPHW:28319	842 population served	2012
Wayne WWTP and Sewer SystemHW:35486	842 population served	2012
FORT GAY WWTPHW:39028	842 population served	2012
SULLY STLHW:29069	841 population served	2012
LYNCHHW:30075	841 population served	2012
Tuscarawas Co Mineral City WWTPHW:35280	841 population served	2012
SOUTHSIDE PLANTHW:37205	841 population served	2008
HANNA LAGOONHW:39681	841 population served	2012
JENNINGS STPHW:26921	840 population served	2012
WALL LAKE STLHW:29108	840 population served	2012
RICEVILLE WWPTHW:29170	840 population served	2012
Northport Village CorpakaBAYSIDEHW:30466	840 population served	2012
Aurora V WWTPHW:33910	840 population served	2012
Delaware Co Scioto Hills WWTPHW:34780	840 population served	2012
VALLEY BROOK WWTHW:35652	840 population served	2012
Lexington WWTPHW:37804	840 population served	2012
Tom Bean WWTPHW:37841	840 population served	2012
COUNCIL STPHW:27390	839 population served	2012
Killbuck WWTP and SewersHW:35194	839 population served	2012
ORBISONIA ROCKHILL STPHW:36657	839 population served	2012
ALAMO WPCPHW:27137	838 population served	2012
Merrimack County Home WWTFHW:33228	838 population served	2012
NEW BERLIN MA STPHW:36669	838 population served	2012
Gould WWTPHW:25659	837 population served	2012
HEDRICK WWTPHW:28739	837 population served	2012
ORRICK WWTPHW:32018	837 population served	2012
ENTERPRISE WWTPHW:29639	836 population served	2012
MAHONING TWP DISTANT STPHW:36732	836 population served	2012
Sumiton LagoonHW:25202	835 population served	2012
REDFIELD STLHW:28990	835 population served	2012
FREDERICK IND PARK WWTHW:35999	835 population served	2012
Williams Co South Central SDHW:34729	834 population served	2012
ARGYLE STPHW:39079	834 population served	2012
VCUD Halifax Plantation WWTFHW:26890	833 population served	2012
SCHLESWIG STLHW:29204	833 population served	2012
MOORINGSPORT STPHW:30173	833 population served	2012
HOLLY RIDGE WWTPHW:34337	833 population served	2012
MCLOUTH WWTPHW:29379	832 population served	2012
RANGELEY WWTFHW:30445	832 population served	2012
FERTILE WWTPHW:31359	832 population served	2012
CURTIS WWTPHW:32763	832 population served	2012
Washingtonville WWTP and Sewer SystemHW:34819	832 population served	2012
FOOTVILLE STPHW:39222	832 population served	2012
QUINTER WWTPHW:29619	831 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.