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
CLYDE WWTPHW:29451	696 population served	2012
Elba V STPHW:33973	696 population served	2012
HOPKINTON WWTPHW:28747	695 population served	2012
LUBEC WWTPHW:30489	695 population served	2012
SHERIDAN WWTPHW:31086	695 population served	2012
New Hampton Village WWTFHW:33155	695 population served	2012
MOUNT VERNON STPHW:36154	695 population served	2012
S D 2 SEWERAGE SYSTEMHW:30350	694 population served	2012
SPRINGPORT STPHW:31003	694 population served	2012
SPALDING WWTPHW:33034	694 population served	2012
BALTIC MUNIC WWT FACILITYHW:37296	694 population served	2012
VIBURNUM WWTPHW:32425	693 population served	2012
MELROSE LAGOONHW:33429	693 population served	2012
KIOWA WWTHW:35595	693 population served	2012
HINCKLEYHW:38169	693 population served	2012
S Frk Coeur D Alene Rvr SD MullanHW:27408	692 population served	2012
STANTON STLHW:29057	692 population served	2012
LITTLETON WWTPHW:34255	692 population served	2012
KINDRED LAGOONHW:34462	692 population served	2012
Gillett WWTPHW:25470	691 population served	2012
PERRY WWTPHW:32283	691 population served	2012
CONWAY WWTPHW:34330	691 population served	2012
TURBOTVILLE BORO STPHW:36679	691 population served	2012
MONTFORT STPHW:39339	691 population served	2012
Yavapai Apache Nation Tunlii WWTPHW:25407	690 population served	2012
COSTILLA CO WSDHW:26425	690 population served	2012
LAKEVILLE WWTPHW:28068	690 population served	2012
EAST BEND WWTPHW:34444	690 population served	2012
Geauga Co Broadwood Hills WWTPHW:34852	690 population served	2012
ECHO STPHW:36117	690 population served	2012
GEORGE STPHW:38542	690 population served	2012
CAMP HILL LAGOONHW:24997	689 population served	2012
ELMORE STPHW:31321	689 population served	2012
CRAWFORD POTWHW:31438	689 population served	2012
WESTPHALIA WWTPHW:32439	689 population served	2012
POWERS STPHW:36171	689 population served	2012
MT SIDNEY FT DEFIANCE STPHW:38455	689 population served	2012
PETERSBURG BORO STPHW:36509	688 population served	2012
KEYSTONE WWTPHW:28779	687 population served	2012
PARAJE CASA BLANCA PONDHW:33482	687 population served	2012
GRANT STPHW:30878	686 population served	2012
TONICA STPHW:27966	685 population served	2012
SHERIDAN WWTPHW:32583	685 population served	2012
KANSAS WWTHW:35779	685 population served	2012
INDIANA CO MSA JACKSONVILLE STPHW:37022	685 population served	2012
CORINNEHW:38184	685 population served	2012
Fighting Creek WWTPHW:38395	685 population served	2012
BRIGHTON WWTPHW:28534	684 population served	2012
SCRANTON WWTPHW:29507	684 population served	2012
SIMSBORO STPHW:30274	684 population served	2012
MATHISTON POTWHW:31540	684 population served	2012
WEBSTER STPHW:39505	684 population served	2012
ELKHART WWTPHW:28657	683 population served	2012
NEW HARTFORD STLHW:28915	683 population served	2012
AMERICUS WWTPHW:29547	683 population served	2012
MANTACHIE POTWHW:31666	683 population served	2012
HUNTERS CROSSING WWTPHW:25254	682 population served	2012
McRae WWTPHW:25762	682 population served	2012
BLAIRSTOWN WWTPHW:28518	682 population served	2012
LATIMER COULTER WWTPHW:28798	682 population served	2012
LE ROY WWTPHW:29580	682 population served	2012
ELIZABETH STPHW:30214	682 population served	2012
CROWDER POTWHW:31441	682 population served	2012
SHELBYVILLE WWTPHW:32360	682 population served	2012
Palestine WWTPHW:25727	681 population served	2012
WATERVILLE WWTPHW:29321	681 population served	2012
PINE HILL WWTPHW:25207	680 population served	2012
STANWOOD WWTPHW:29058	680 population served	2012
OLUSTEE WWTHW:35842	680 population served	2012
GALLAWAY WWTPHW:37387	680 population served	2012
Pettus WWTPHW:37683	680 population served	2012
Rule WWTPHW:37719	680 population served	2012
Roxton WWTPHW:37953	680 population served	2012
HILLS WWTPHW:28741	679 population served	2012
MORAVIA STLHW:28894	679 population served	2012
BAILEY WWTPHW:34323	679 population served	2012
MILLERSTOWN BORO STPHW:36526	679 population served	2012
SPRINGFIELD PLANT 1HW:37086	679 population served	2008
WYOCENA WWTPHW:39530	678 population served	2012
Imboden WWTPHW:25615	677 population served	2012
DUBOIS S_T FACILITYHW:27484	677 population served	2012
ALMA CENTER STPHW:39069	677 population served	2012
PORT PENN STPHW:26636	676 population served	2012
GRATZ BORO STPHW:36362	676 population served	2012
PLEASANT HILL STPHW:30297	675 population served	2012
NORTH CARROLLTON POTWHW:31559	675 population served	2012
Limestone V WWTPHW:34060	675 population served	2012
Oakwood WWTP and Sewer SystemHW:34965	675 population served	2012
WARTRACE WWTPHW:37533	675 population served	2012
ELEVA CSHW:39202	675 population served	2012
CLAFLIN WWTPHW:29241	674 population served	2012
HILLMAN STPHW:31035	674 population served	2012
CLOUDCROFT VILLAGE OFHW:33405	674 population served	2012
OAKLAND PWA WWTHW:35903	674 population served	2012
WALKER W W LAGOONHW:29106	673 population served	2012
ONAGA WWTPHW:29389	673 population served	2012
COLERIDGE WWTPHW:32683	673 population served	2012
BERTRAND WWTPHW:32696	673 population served	2012
FONTANELLE STLHW:28686	672 population served	2012
HOSPERS WWTPHW:28749	672 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.