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
Tillar WWTPHW:25549	366 population served	2012
NICHOLS STLHW:28923	366 population served	2012
BUTTE WWTPHW:32647	366 population served	2012
STANTON LAGOONHW:34685	366 population served	2012
NEWPORT WWTPHW:38256	366 population served	2012
FAIRWATER WWTPHW:39214	366 population served	2012
THAYNE LAGOONHW:39700	366 population served	2012
GARDEN CITY WWTPHW:25033	365 population served	2012
Lake Dalecarlia RWDHW:28029	365 population served	2012
ACCIDENT WWTPHW:30672	365 population served	2012
MINDENMINES WWTPHW:32169	365 population served	2012
DEXTER WWTPHW:29245	364 population served	2012
LYNCH WWTPHW:32646	364 population served	2012
Ney WWTP and SewersHW:34952	364 population served	2012
Chickasaw WWTP and SewersHW:34973	364 population served	2012
Higginsport WWTP and Sewer SystemHW:35175	364 population served	2012
Woodbrook Sewage Treatment PlantHW:38566	364 population served	2012
Biscoe WWTPHW:25716	363 population served	2012
WINSLOW WTPHW:27947	363 population served	2012
CINCINNATI STLHW:28568	363 population served	2012
RAYMONDVILLE WWTPHW:32192	363 population served	2012
OTTAWA 1 WYANDOTTE WWTHW:35941	363 population served	2012
HARTSVILLE WWTPHW:28200	362 population served	2012
WETMORE WWTPHW:29407	362 population served	2012
MAYNARD STPHW:31319	362 population served	2012
New Ross WWTPHW:28430	361 population served	2012
MARBLE ROCK WWTPHW:28855	361 population served	2012
RYAN WWTPHW:29018	361 population served	2012
WORTHINGTON WWTPHW:29151	361 population served	2012
LaCasa Grande Water and Sewer DistrictHW:32633	361 population served	2012
MILL CREEK BORO STPHW:36652	361 population served	2012
Mitchellville WWTPHW:25548	360 population served	2012
Heritage Place WWTFHW:26849	360 population served	2012
ELK CITY SEWAGE TREATMENT SYSTEMHW:27502	360 population served	2012
MAYETTA WWTPHW:29380	360 population served	2012
SILVER CREEK POTWHW:31613	360 population served	2012
ST MARY WWTPHW:32400	360 population served	2012
GLENVIL WWTPHW:32824	360 population served	2012
NEWCASTLE WWTPHW:32953	360 population served	2012
WILCOX WWTPHW:33084	360 population served	2012
Scioto Co Purtee Acres WWTPHW:35402	360 population served	2012
DUTCH JOHNHW:38211	360 population served	2012
Cusick Wastewater Treatment PlantHW:38700	360 population served	2012
ENDICOTT S_T FACILITYHW:38704	360 population served	2012
OGEMA SD 1 STPHW:39601	360 population served	2012
FLOYD WWTPHW:28684	359 population served	2012
SOUTH HAVEN WWTPHW:29288	359 population served	2012
WILLIAMSBURG WWTPHW:29524	359 population served	2012
DUNCAN WWTPHW:32871	359 population served	2012
PLATTE CENTER WWTPHW:32993	359 population served	2012
MILLERTON WWTHW:35890	359 population served	2012
GENOA STPHW:39230	359 population served	2012
Hill CountyHW:32631	358 population served	2012
HILTON CREEK WWTFHW:26171	357 population served	2012
ATALISSA STLHW:28493	357 population served	2012
LACONA WWTPHW:28785	357 population served	2012
FREEBURG WWTPHW:31809	357 population served	2012
SAWYER LAGOONHW:34490	357 population served	2012
SNYDERTOWN BORO STPHW:36641	357 population served	2012
AKRON LAGOONHW:24972	356 population served	2012
MENLO WWTPHW:28871	356 population served	2012
LINWOOD WWTPHW:29545	356 population served	2012
NEW GERMANY WWTFHW:31266	356 population served	2012
LINCOLN CO RSD 4 AGRA WWTHW:35868	356 population served	2012
MNTN TOP PSD BAYARD WWTPHW:38844	356 population served	2012
Wheatley WWTPHW:25728	355 population served	2012
FAIRFIELD TWP WESTON WWSLHW:31183	355 population served	2012
BAKERSVILLE WWTPHW:34313	355 population served	2012
WESTPORT STPHW:36206	355 population served	2012
SURRY STPHW:38389	355 population served	2012
THORNBURG REG STPHW:38504	355 population served	2012
LIBERTY SD 1 STPHW:39587	355 population served	2012
Montrose WWTPHW:25476	354 population served	2012
EASTON WWTPHW:29546	354 population served	2012
KULM LAGOONHW:34611	354 population served	2012
HAWORTH WWTHW:35889	354 population served	2012
ST PAUL STPHW:36046	354 population served	2012
BERRYSBURG BORO STPHW:36319	354 population served	2012
DUNGANNON STPHW:38464	354 population served	2012
ARPIN WWTPHW:39618	354 population served	2012
PCRWRD Mount Lemmon WWTFHW:25358	353 population served	2012
LANE COIMP DIST 1 WWTPHW:29820	353 population served	2012
FOREST HILL STPHW:30131	353 population served	2012
Geauga Co Russell Park WWTPHW:35126	353 population served	2012
ORWELL W P C FHW:38260	353 population served	2012
COWEN PSD CAMP CEASAR WWTPHW:39029	353 population served	2012
NORTH CHOCTAW WWTPHW:25189	352 population served	2012
MANNFORD PWA EAST WWTHW:35695	352 population served	2012
WHITE LAKE STPHW:39515	352 population served	2012
Etowah WWTPHW:25680	351 population served	2012
MILLER KILPATRICK WWTFHW:25940	351 population served	2012
COMER WPCPHW:27166	351 population served	2012
PLAINS WPCPHW:27274	351 population served	2012
GRAINFIELD WWTPHW:29635	351 population served	2012
BRAINARD WWTPHW:32703	351 population served	2012
MIDDLEBORO MA MCKEAN BORO STPHW:37024	351 population served	2012
BOWLER STPHW:39121	351 population served	2012
SOUTHSIDE LAGOONHW:25099	350 population served	2012
ARITON LAGOONHW:25126	350 population served	2012
Port Costa WWTFHW:25837	350 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.