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
SIDON POTWHW:31612	672 population served	2012
LAKOTA LAGOONHW:34483	672 population served	2012
FLORENCE WWTPHW:29566	671 population served	2012
EVERTON WWTPHW:32411	671 population served	2012
STOCKBRIDGE STPHW:39558	671 population served	2012
Oxford WWTPHW:25611	670 population served	2012
WALDO WWTPHW:26655	670 population served	2012
TROY EAST WWTP PETERS CRKHW:29541	670 population served	2012
SHARPTOWN WWTPHW:30643	670 population served	2012
DCRUA Twin Lakes POTW No 1HW:31454	670 population served	2012
Chazy T STP and Onsite SystemsHW:33779	670 population served	2012
Kirby Creek WWTPHW:37572	670 population served	2012
Godley WWTPHW:37844	670 population served	2012
ALBA STPHW:37908	670 population served	2012
MILLBORO STPHW:38329	670 population served	2012
HATFIELD SD 1 STPHW:39583	670 population served	2012
GLENWOOD LAGOONHW:27209	669 population served	2012
LOUISVILLE WPCP 2HW:27240	669 population served	2012
ELK HORN WWTPHW:28658	669 population served	2012
HAWK POINT WWTPHW:32237	669 population served	2012
PIOCHE PUBLIC UTILITIESHW:33136	669 population served	2012
WEST JEFFERSON WWTPHW:34128	669 population served	2012
LANGLEY WWTHW:35616	669 population served	2012
EUREKAHW:38156	669 population served	2012
ROCKLAND STPHW:39429	669 population served	2012
OXFORD WWTPHW:28948	668 population served	2012
Village of WilsonHW:30247	668 population served	2012
ELMWOOD WWTPHW:33096	668 population served	2012
VICI WWTHW:35591	668 population served	2012
NEW AUGUSTA POTWHW:31556	667 population served	2012
AXTELL WWTPHW:32662	667 population served	2012
FORT COBB WWTHW:35745	667 population served	2012
FRANKLIN FAYETTE STP _SMOCKHW:36846	667 population served	2012
PUTNEY WPCFHW:38265	667 population served	2012
IRVING STPHW:27898	665 population served	2012
PEARL CITY STPHW:27946	665 population served	2012
MANGHAM PONDHW:30295	665 population served	2012
NORWOOD WWTPHW:32461	665 population served	2012
Croghan V STPHW:33859	665 population served	2012
Butler Co Wade Mill WRFHW:35013	665 population served	2012
KIRKLIN WWTHW:28198	664 population served	2012
WHEATLAND TWP WWTPHW:31032	664 population served	2012
WELLINGTON WWTPHW:32172	664 population served	2012
CALLAWAY WWTPHW:32719	664 population served	2012
VALPARAISO WWTPHW:32921	664 population served	2012
Sherman V WWTPHW:34076	664 population served	2012
STEPHENS CO 1 VELMA WWTHW:35987	664 population served	2012
KNIGHTS LANDING WWTFHW:26071	663 population served	2012
ETNA GREEN STPHW:28297	663 population served	2012
OLIN WWTPHW:28935	663 population served	2012
HORNERSVILLE WWTPHW:32085	663 population served	2012
BOYD WWTPHW:39123	663 population served	2012
CAZENOVIA STPHW:39145	663 population served	2012
Black Rock WWTPHW:25651	662 population served	2012
DANA WWTPHW:28053	662 population served	2012
POMEROY STLHW:28972	662 population served	2012
HERMANVILLE FACILITYHW:31673	662 population served	2012
STRATTANVILLE BORO STPHW:36894	662 population served	2012
POTTS CAMP POTW NORTHWESTHW:31581	661 population served	2012
CLEVELAND WWTPHW:31908	661 population served	2012
ELGIN WWTPHW:32787	661 population served	2012
STUART WWTPHW:32983	661 population served	2012
FORT JONES WWTFHW:25831	660 population served	2012
PARAGON WWTPHW:28016	660 population served	2012
DOWS WWTPHW:28634	660 population served	2012
ASHLAND SEWAGE LAGOONSHW:30473	660 population served	2012
JUMPERTOWN TOWN OF WWTFHW:31405	660 population served	2012
Carter Co Sewer District 1HW:32315	660 population served	2012
LA BELLE NW WWTPHW:32361	660 population served	2012
SOUTH VERSAILLES TWP STPHW:36830	660 population served	2012
SOLDIERS GROVE WWTPHW:39637	660 population served	2012
NEW MARKET WWTPHW:28322	659 population served	2012
MADISONVILLE STPHW:30166	659 population served	2012
MORGANZA PONDHW:30291	659 population served	2012
VERDEN PWA WWTHW:35606	659 population served	2012
SHIPSHEWANA WWTPHW:28306	658 population served	2012
COGGON WWTPHW:28580	658 population served	2012
LONE TREE SOUTH WWTPHW:28825	657 population served	2012
GREEN CITY WWTPHW:31808	657 population served	2012
WINTER STPHW:39605	657 population served	2012
RIRIE SEWAGE LAGOONSHW:27381	656 population served	2012
Mora MWandSWAHW:33511	656 population served	2012
LINDEN STPHW:39296	656 population served	2012
Santa Nella WWTFHW:26055	655 population served	2012
FARMINGTON WWTPHW:28678	655 population served	2012
EPPS LAGOONHW:30340	655 population served	2012
HICKORY POTWHW:31502	655 population served	2012
GROVER WWTPHW:34189	655 population served	2012
Groom WWTPHW:37588	655 population served	2012
NORTH SALEM WWTPHW:27997	653 population served	2012
ELMA WWTPHW:29167	653 population served	2012
MILNOR LAGOONHW:34633	653 population served	2012
KANAWHA STLHW:28771	652 population served	2012
DANVILLE PERRYVILLE STPHW:30032	652 population served	2012
LOUISE POTWHW:31526	652 population served	2012
JONESBURG WWTPHW:32143	652 population served	2012
LIDGERWOOD LAGOONHW:34618	652 population served	2012
Osgood WWTP and SewersHW:34867	652 population served	2012
CARROL VALLEY SEW and WAT STPHW:36557	652 population served	2012
Cherry Valley WWTPHW:25542	651 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.