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
SAN LUIS LAGOONSHW:26311	739 population served	2012
TIGERTON WWTPHW:39478	739 population served	2012
NIANTIC STPHW:27697	738 population served	2012
RICHLYN MANOR WWTPHW:30684	738 population served	2012
BELGRADE STPHW:31262	738 population served	2012
AUSTIN BORO STPHW:36880	738 population served	2012
SULLIVAN WWTPHW:39468	738 population served	2012
LAVA HOT SPRINGS S_T FACILITYHW:27383	737 population served	2012
DELTA WWTPHW:28619	737 population served	2012
CHENEYVILLE SEWAGE DISPOSAL SYSTEMHW:30119	737 population served	2012
IRON MOUNTAIN LAKE WWTPHW:32288	737 population served	2012
ST NAZIANZ WWTPHW:39433	737 population served	2012
J H HOUSE SCHOOLHW:27168	736 population served	2012
IBERIA WWTPHW:31806	736 population served	2012
THOMAS WWTPHW:39017	736 population served	2012
BUCKLIN WWTPHW:29231	735 population served	2012
WHEELWRIGHT STPHW:29866	735 population served	2012
Turrell WWTPHW:25541	734 population served	2012
Metamora RSDHW:28411	734 population served	2012
METAMORA WWTFHW:30920	734 population served	2012
ELWOOD WWTPHW:32793	734 population served	2012
ROFF WWTHW:35957	734 population served	2012
REDDELL PONDHW:30250	733 population served	2012
Essex T STP and On Site SystemsHW:33822	733 population served	2012
Meridian Heights Water and Sewer AssoHW:27538	732 population served	2012
MURRAY STLHW:28905	731 population served	2012
Thornville WWTP and Sewer SystemHW:35447	731 population served	2012
BURNSVILLE WWTPHW:38811	731 population served	2012
STAR PRAIRIE STPHW:39460	731 population served	2012
CAMPBELLSBURG WWTPHW:28373	730 population served	2012
HEBRON WWTPHW:30641	730 population served	2012
SAVANNA WWTHW:35593	730 population served	2012
New Deal WWTPHW:37697	730 population served	2012
REDMONDHW:38197	730 population served	2012
MELLEN WWTPHW:39322	730 population served	2012
MERRILL STPHW:30988	728 population served	2012
COLFAX WWTPHW:28223	727 population served	2012
GARNAVILLO WWTPHW:28696	727 population served	2012
MABEN POTWHW:31535	727 population served	2012
LA VETA STPHW:26351	726 population served	2012
ANDALE WWTPHW:29223	726 population served	2012
SHARON SPRINGS WWTPHW:29658	726 population served	2012
MARSTON WWTPHW:32092	726 population served	2012
WEBBER S FALLS WWTHW:35919	726 population served	2012
Edgemont Ranch MDHW:26505	725 population served	2012
UDALL WWTPHW:29813	725 population served	2012
Prattsville T hamlet WWTF and On SHW:33775	725 population served	2012
RHODISS WWTPHW:34165	725 population served	2012
PORUM PWA WWTHW:35594	725 population served	2012
NACHES STPHW:38616	725 population served	2012
Bloomdale WWTP and Sewer SystemHW:34996	724 population served	2012
WHEATLAND WWTPHW:29136	723 population served	2012
CEDAR VALE WWTPHW:29764	723 population served	2012
Village of MermentauHW:30212	723 population served	2012
DECATUR POTW NUMBER 2HW:31445	723 population served	2012
WINFIELD WWTPHW:32319	723 population served	2012
SCOTTSVILLE STPHW:38416	723 population served	2012
CHEROKEE WWTPHW:29556	722 population served	2012
ROLFE STPHW:29214	721 population served	2012
WHEATON WWTPHW:32316	721 population served	2012
MOTT LAGOONHW:34639	721 population served	2012
Shiloh WWTP and Sewer SystemHW:35412	721 population served	2012
SIOUX RAPIDS WWTPHW:29044	720 population served	2012
Tuxedo Park V WWTPHW:33631	720 population served	2012
Byron T 3 STP s and OnsitesHW:34029	720 population served	2012
L MAHANOY TWP DALMATIA STPHW:36674	720 population served	2012
Trenton WWTPHW:37942	720 population served	2012
LOWMOOR STPHW:38482	720 population served	2012
UNION WWTPHW:38946	720 population served	2012
SCREVEN LASHW:27287	719 population served	2012
Preston WWTPHW:30572	719 population served	2012
Martingham Wastewater Treatment SystemHW:30625	719 population served	2012
COLMAN STPHW:37304	719 population served	2012
MOYIE SPRINGS S_T FACHW:27497	718 population served	2012
GREENSBURG PONDHW:30304	718 population served	2012
BEVIER WWTPHW:31813	718 population served	2012
VAUGHN COUNTY WandS DISTRICTHW:32543	718 population served	2012
CAIRO WWTPHW:32829	718 population served	2012
FRANCIS CREEK WWTPHW:39224	718 population served	2012
SEVASTOPOL SD 1 STPHW:39571	718 population served	2012
MINNEOLA WWTPHW:29335	717 population served	2012
COON VALLEY WWTPHW:39170	717 population served	2012
MERRILLAN WWTPHW:39327	717 population served	2012
CHATOM LAGOONHW:25002	716 population served	2012
VAN HORNE WWTPHW:29095	716 population served	2012
SALEMHW:30074	716 population served	2012
STRATFORD WWTPHW:29066	715 population served	2012
BENHAMHW:29930	715 population served	2012
SALEM TOWNSHIP STPHW:30974	715 population served	2012
STEELE LAGOONHW:34686	715 population served	2012
BROOKSVILLEHW:29938	714 population served	2012
GERALD NORTH LAGOONHW:31871	714 population served	2012
VERONA WWTPHW:32453	714 population served	2012
JOLIET WWTPHW:32524	714 population served	2012
PIKEVILLE WWTPHW:34430	714 population served	2012
FAYETTE CITY STPHW:36838	714 population served	2012
FT DUCHESNEHW:38202	714 population served	2012
RELIANCE LAGOONHW:39725	714 population served	2012
Lake Shastina WWTFHW:25817	713 population served	2012
COTTONDALE STPHW:26933	713 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.