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
BERTRAND WWTPHW:32106	550 population served	2012
EKALAKA WWTPHW:32529	550 population served	2012
Riverhead T Community College WWTPHW:33562	550 population served	2012
Wawarsing T Kerhonkson STPHW:33685	550 population served	2012
Guilderland T NE Ind Park STPHW:33708	550 population served	2012
BUNN WWTPHW:34230	550 population served	2012
Wayne County Burbank WWTP and SewersHW:34831	550 population served	2012
Chilton WWTPHW:37803	550 population served	2012
EAST TAWAKONI STPHW:37919	550 population served	2012
POY SIPPI SD STPHW:39638	550 population served	2012
ROANN WWTPHW:28130	548 population served	2012
PLAINVILLE WWTPHW:28194	548 population served	2012
MONROE CITY WWTPHW:28293	548 population served	2012
VIENNA WWTPHW:30670	548 population served	2012
SACRED HEART WWTPHW:31363	548 population served	2012
SHERMAN POTWHW:31683	548 population served	2012
New Bloomington WWTP and SewersHW:34887	548 population served	2012
NEW AUBURN WWTPHW:39351	548 population served	2012
DEARING LASHW:27184	547 population served	2012
EDGERTON WWTPHW:31854	546 population served	2012
ALTONA STPHW:27920	545 population served	2012
MYSTIC WWTPHW:28907	545 population served	2012
Erving Village Wastewater SystemHW:30761	545 population served	2012
LAFAYETTE STPHW:31317	545 population served	2012
HAMILTON WWTP SEHW:32381	545 population served	2012
Coalton WWTP and Sewer SystemHW:35055	545 population served	2012
FOSSIL STPHW:36121	545 population served	2012
Otis SDHW:26499	544 population served	2012
CHRISNEY WWTPHW:28361	544 population served	2012
RILEY WWTPHW:29396	544 population served	2012
GREENWOOD WWTPHW:32950	544 population served	2012
PLEASANT HILL STPHW:37487	544 population served	2012
PIERCE S_T PLANTHW:27417	543 population served	2012
BLUE MOUNTAIN POTWHW:31401	543 population served	2012
BLUE SPRINGS WWTPHW:32671	543 population served	2012
Rushsylvania WWTP and Sewer SystemHW:34871	543 population served	2012
Eldorado WWTP and Sewer SystemHW:35091	543 population served	2012
HULBERT PWA WWTHW:35755	543 population served	2012
LEXINGTON PRISON WWTHW:35762	543 population served	2012
VAIL LAGOONHW:29205	542 population served	2012
MARQUETTE WWTPHW:29654	542 population served	2012
MANLIUS STPHW:27808	541 population served	2012
GROSSE TETE STPHW:30261	541 population served	2012
ORLEANS WWTPHW:32643	541 population served	2012
Lyons Falls V STPHW:33861	541 population served	2012
CALPELLA WWTPHW:25814	540 population served	2012
LECOMPTON WWTPHW:29374	540 population served	2012
ALDA WWTPHW:32830	540 population served	2012
Clarksburg WWTP and Sewer SystemHW:35038	540 population served	2012
Stockport WWTP and Sewer SystemHW:35426	540 population served	2012
Campbell WWTPHW:37950	540 population served	2012
Nome WWTPHW:37956	540 population served	2012
BOWLING GREEN STPHW:38400	540 population served	2012
NEW HOPE STPHW:38460	540 population served	2012
MADISON REGIONAL STPHW:38481	540 population served	2012
TOLEDO STPHW:38668	540 population served	2012
BIRCHWOOD STPHW:39106	540 population served	2012
OCHEYEDAN WWTPHW:28933	539 population served	2012
BLAND WWTPHW:32437	539 population served	2012
BIG SPRINGS WWTPHW:32697	539 population served	2012
Lindsey WWTP and Sewer SystemHW:34939	539 population served	2012
King County Vashon WWTPHW:38755	539 population served	2012
PINE GROVE WWTPHW:39035	539 population served	2012
GOESSEL WWTPHW:29433	538 population served	2012
PROVENCAL WWCTSHW:30285	538 population served	2012
BAILEYTON WWTPHW:37317	538 population served	2012
SEKIU STPHW:38555	538 population served	2012
TAYLOR WWTPHW:39475	538 population served	2012
BURLINGTON JCT WWTPHW:31974	537 population served	2012
KIDD ISLAND BAY STPHW:27511	536 population served	2012
LEHIGH WWTPHW:28805	536 population served	2012
LITTLE RIVER WWTPHW:29444	536 population served	2012
SPENCER WWTPHW:32648	536 population served	2012
Fort Hancock WWTPHW:37609	536 population served	2012
Kennard WWTPHW:37979	536 population served	2012
HIXTON WWTPHW:39256	536 population served	2012
DALE SD 1 WWTPHW:39537	536 population served	2012
MIDDLETOWN WWTPHW:28875	535 population served	2012
MILBRIDGE WWTPHW:30507	535 population served	2012
MCMILLAN TWP STPHW:31146	535 population served	2012
HICKORY FLAT POTWHW:31503	535 population served	2012
Delanson V Sewer D 1 STPHW:33769	535 population served	2012
COKEVILLE WWTPHW:39669	535 population served	2012
HOT SULPHUR SPR WWTPHW:26365	534 population served	2012
NEW ALBIN WWTPHW:28911	534 population served	2012
ARGONIA WWTPHW:29225	534 population served	2012
SLEDGE POTWHW:31614	534 population served	2012
Lewistown WWTPHW:32365	534 population served	2012
THOMPSON FALLS TOWN OF WWTPHW:32576	534 population served	2012
OXFORD WWTPHW:39376	534 population served	2012
GARWIN STLHW:28699	533 population served	2012
FLOODWOOD WWTR TRTMT WKSHW:31240	533 population served	2012
KEYTESVILLE WWTPHW:32253	533 population served	2012
WAYLAND WWTPHW:32320	533 population served	2012
TOWNER LAGOONHW:34694	533 population served	2012
MOSSYROCK S_T FACILITYHW:38731	533 population served	2012
SCOTLAND PONDHW:27286	532 population served	2012
CAMDEN STPHW:31162	532 population served	2012
HOPKINS WWTPHW:31977	532 population served	2012
FORGAN WWTHW:35722	532 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.