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
SHELDON WWTPHW:39442	253 population served	2012
MATTAWAMKEAG WWTFHW:30514	252 population served	2012
CROMWELL STPHW:31347	252 population served	2012
GRACE POTWHW:31679	252 population served	2012
COMSTOCK WWTPHW:32748	252 population served	2012
DAVENPORT LAGOONHW:34468	252 population served	2012
Wall Lake Sanitary DistrictHW:37281	252 population served	2012
GORMAN WWTFHW:25936	251 population served	2012
FARQUAR STATE CATTLE RANCHHW:25216	250 population served	2012
Saint Francis WWTPHW:25513	250 population served	2012
DON PEDRO WWTFHW:26150	250 population served	2012
ELBERT STPHW:26394	250 population served	2012
CRAWFORD LAGOONHW:26415	250 population served	2012
LARKSPUR LAGOONHW:26420	250 population served	2012
Big Bend Water AuthorityHW:26909	250 population served	2012
NORTH TOMER BUTTE LAGOONHW:27532	250 population served	2012
BLENCOE STLHW:28520	250 population served	2012
ELBERON STLHW:28652	250 population served	2012
LAKEWOOD HILLS I D WWTPHW:29416	250 population served	2012
JF CO S D 2 IND RIDGE WWTPHW:29417	250 population served	2012
HILLVIEW WWTPHW:29846	250 population served	2012
IDA STPHW:30147	250 population served	2012
Mandela WWTPHW:30290	250 population served	2012
Kitzmiller WWTSHW:30597	250 population served	2012
Poplar HillHW:30665	250 population served	2012
HUNTSVILLE NE LAGOONHW:31791	250 population served	2012
COUNTY DOWNESHW:31931	250 population served	2012
OLD MONROE WWTPHW:32280	250 population served	2012
BELFRY LAGOONHW:32526	250 population served	2012
SACO WWTPHW:32565	250 population served	2012
BRADY WUA WWTPHW:32566	250 population served	2012
FORT PECK LAGOONSHW:32608	250 population served	2012
ROBERTS CARBON CO COMMHW:32615	250 population served	2012
GARLAND WWTPHW:32820	250 population served	2012
Wawayanda T Ridgebury Lake STPHW:33635	250 population served	2012
Carmel T SD 5 STP HillsdaleHW:33640	250 population served	2012
Dresden T Huletts Landing STPHW:33830	250 population served	2012
Dekalb T DJunction STP and On SiteHW:33875	250 population served	2012
Gallia Co Tara SubdivisionHW:34755	250 population served	2012
Franklin Co Taylor Estates WWTPHW:34791	250 population served	2012
Lake Erie Utilities Burgandy Bay WWTPHW:34807	250 population served	2012
South Salem WWTP and Sewer SystemHW:35290	250 population served	2012
Preble Co Sewer District 3 WWTPHW:35493	250 population served	2012
SAND SPRINGS SAND CREEK WWTHW:35677	250 population served	2012
EARLSBORO PWA WWTHW:35960	250 population served	2012
BLY STPHW:36090	250 population served	2012
JORDAN VALLEY STPHW:36137	250 population served	2012
PAISLEY STPHW:36165	250 population served	2012
RICHLAND STPHW:36176	250 population served	2012
LEWIS TWP NORTHUMBERLAND STPHW:36680	250 population served	2012
HILLSBORO WWTPHW:38964	250 population served	2012
Maple Grove Estates SD STPHW:39064	250 population served	2012
NAPOLEON Rural Water CorpHW:28356	249 population served	2012
LUANA WWTPHW:28832	249 population served	2012
VAN WERT WWTPHW:29097	249 population served	2012
MALTA BEND WWTPHW:31833	249 population served	2012
BLACKBURN WWTPHW:31846	249 population served	2012
CENTERVIEW WWTPHW:32023	249 population served	2012
BRONAUGH WWTPHW:32133	249 population served	2012
WASHINGTONVILLE STPHW:36618	249 population served	2012
ROXBURY SD 1 STPHW:39546	249 population served	2012
Louviers WSDHW:26450	248 population served	2012
KANORADO WWTPHW:29754	248 population served	2012
Harmony Hills WWTPHW:30368	248 population served	2012
CRAIG WWTPHW:31973	248 population served	2012
AMHERST WWTPHW:32882	248 population served	2012
DUNCAN TWP ANTRIM STPHW:36465	248 population served	2012
NEW CASTLE STPHW:38435	248 population served	2012
BROWNTOWN STPHW:39132	248 population served	2012
MOSCOW WWTPHW:29338	247 population served	2012
CURTISS STPHW:39177	247 population served	2012
ALTA VISTA WWTPHW:28477	246 population served	2012
KESWICK RUSSHW:28778	246 population served	2012
MACEDONIA WW STAB LAGOONHW:28840	246 population served	2012
AVOCA WWTPHW:32943	246 population served	2012
MURDOCK WWTPHW:32949	246 population served	2012
Ross Co Union Heights WWTP and SewersHW:34765	246 population served	2012
RICHMOND TWP _ VIRGINVILLE STPHW:36359	246 population served	2012
WINCHESTER S_T FACILITYHW:27435	245 population served	2012
MOORE Water and Sewer AssociationHW:27482	245 population served	2012
LANSFORD LAGOONHW:34494	245 population served	2012
UKIAH STPHW:36194	245 population served	2012
ROCK RIVER LAGOONHW:39664	245 population served	2012
WOODBURN WWTPHW:29148	244 population served	2012
GRENORA LAGOONHW:34592	244 population served	2012
BRAMAN STPHW:35853	244 population served	2012
BARNES CITY STLHW:28504	243 population served	2012
RANDOLPH WWTPHW:28987	243 population served	2012
WADENA WW STABIL LAGOONHW:29164	243 population served	2012
PARTRIDGE WWTPHW:29275	243 population served	2012
CHATHAM STPHW:31129	243 population served	2012
GRANDIN WWTPHW:32239	243 population served	2012
PRAIRIE HOME WWTPHW:32447	243 population served	2012
ELBA WWTPHW:32786	243 population served	2012
Garland WWTPHW:25678	242 population served	2012
RENWICK STLHW:28995	242 population served	2012
AMSTERDAM WWTPHW:32162	242 population served	2012
HOOPLE LAGOONHW:34603	242 population served	2012
SHERWOOD LAGOONHW:34680	242 population served	2012
MARBLE CITY WWTHW:35633	242 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.