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
FREEBURG BORO STPHW:36663	831 population served	2012
SHADY SPRING PSD FLAT TOP WWTPHW:38989	831 population served	2012
Hermitage WWTPHW:25492	830 population served	2012
AUGUSTA STPHW:27953	830 population served	2012
VERNON WWTPHW:31088	830 population served	2012
AMBOY TWP WWSLHW:31164	830 population served	2012
KILMICHAEL POTWHW:31516	830 population served	2012
STONEWALL POTWHW:31619	830 population served	2012
Westport T SD1 STP and On SitesHW:33795	830 population served	2012
Erie Co SD3 Ext Holland T STPHW:34094	830 population served	2012
OAK ISLAND SATELLITE WWTPHW:34154	830 population served	2012
MARENGO WWTPHW:28196	829 population served	2012
ISLETON WWTFHW:26011	828 population served	2012
KOOSKIA WTPHW:27422	828 population served	2012
ALPINE WWTPHW:39730	828 population served	2012
FORESTVILLE WWTFHW:25786	827 population served	2012
Plumerville WWTPHW:25523	826 population served	2012
BLUFFS STPHW:27573	826 population served	2012
SHANNON POTW Lagoon No 1HW:31606	826 population served	2012
FREMONT HILLS WWTFHW:32279	826 population served	2012
Marshallville WWTP and Sewer SystemHW:34837	826 population served	2012
MIRANDA WWTFHW:25793	825 population served	2012
Pembroke TownshipHW:27833	825 population served	2012
CAMPTON STPHW:29944	825 population served	2012
VAN BUREN SAFHW:30453	825 population served	2012
Adena WWTP and Sewer SystemHW:34761	825 population served	2012
NWWSD Risingsun WWTP and Sewer SystemHW:35383	825 population served	2012
WELLSTON PWA WWTHW:35876	825 population served	2012
EAST UNION TWP STP SCHUYLKILLHW:36401	825 population served	2012
TEKONSHA LAGOONHW:31058	824 population served	2012
BRIDGER LAGOONSHW:32523	824 population served	2012
Picacho Hills Utility CompanyHW:33515	824 population served	2012
DRAYTON LAGOONHW:34562	824 population served	2012
Lorain Co Cresthaven WWTPHW:35228	824 population served	2012
BIRNAMWOOD STPHW:39108	824 population served	2012
WEDOWEE LAGOONHW:25113	823 population served	2012
MEDARYVILLEHW:28344	823 population served	2012
HAZELTON WWTPHW:28738	823 population served	2012
WAUNETA WWTPHW:33076	823 population served	2012
Northampton T STP and On Site SysHW:33828	823 population served	2012
SAINT EDWARD WWTPHW:33017	822 population served	2012
SPARTA PONDHW:27293	821 population served	2012
CORRECTIONVILLE WWTPHW:28593	821 population served	2012
MOUND CITY WWTPHW:29499	821 population served	2012
SANDERSVILLE POTWHW:31600	821 population served	2012
TRANCAS WWTFHW:25938	820 population served	2012
CRAWFORDVILLE WPCPHW:27057	820 population served	2012
LYONS WWTPHW:28260	820 population served	2012
AVONMORE BORO STPHW:36786	820 population served	2012
BEDMINSTER TWP STONEBRIDGE STPHW:36989	820 population served	2012
Lott WWTPHW:37759	820 population served	2012
TEKOA S_T FACILITYHW:38667	820 population served	2012
UNITY WWTFHW:30500	819 population served	2012
WESTPHALIA WWTLHW:30821	819 population served	2012
HENNING STPHW:31311	819 population served	2012
CULBERTSON WWTPHW:32571	819 population served	2012
HANKINSON LAGOONHW:34597	819 population served	2012
COLCORD WWTHW:35778	819 population served	2012
WONEWOC WWTPHW:39526	819 population served	2012
BATTLE CREEK WWTPHW:28507	818 population served	2012
KENESAW WWTPHW:33004	818 population served	2012
Junction City WWTP and Sewer SystemHW:35190	818 population served	2012
LAMBERTON WWTPHW:31349	817 population served	2012
Lower Alloways Creek Township Hancocks Bridge TPHW:33341	817 population served	2012
HUMPHREY WWTPHW:32870	816 population served	2012
TRENTON WWTPHW:33060	816 population served	2012
Perrysville WWTP and Sewer SystemHW:35342	816 population served	2012
ROSE HILL STP and Collection SystemHW:38462	816 population served	2012
GILBERT WWTPHW:38940	815 population served	2012
RIDGEVILLE WWTPHW:28350	814 population served	2012
Nevada WWTP and Sewer SystemHW:34896	814 population served	2012
GRANTSVILLE WWTPHW:38823	814 population served	2012
Clinton West WWTPHW:25751	813 population served	2012
North La Junta SDHW:26423	813 population served	2012
GRAETTINGER STLHW:28710	813 population served	2012
ONSTED STPHW:31027	813 population served	2012
EMILYHW:31370	813 population served	2012
Hackett WWTPHW:25735	812 population served	2012
STEWARTSVILLE WW LAGOONHW:31796	812 population served	2012
GLIDDEN SD STPHW:39555	812 population served	2012
LOREAUVILLE STPHW:30260	811 population served	2012
WAUZEKA WWTPHW:39504	811 population served	2012
OSSIAN WWTPHW:29175	810 population served	2012
MINATARE WWTPHW:32929	810 population served	2012
LINTON LAGOONHW:34472	810 population served	2012
ADAIR WWTHW:35904	810 population served	2012
BRYN ATHYN BORO STPHW:36234	810 population served	2012
FINCASTLE STPHW:38436	810 population served	2012
BLANCHARDVILLE STPHW:39111	810 population served	2012
Geyserville WWTFHW:25829	809 population served	2012
MCCAMMON S_T FACILITYHW:27474	809 population served	2012
YORK HAVEN BORO STPHW:36520	809 population served	2012
GRAND JUNCTION WWTPHW:28712	808 population served	2012
HINTON WWTPHW:28743	808 population served	2012
READLYN WWTPHW:28988	808 population served	2012
GRANT CITY WEST LAGOONHW:32240	808 population served	2012
BEAVER CITY WWTPHW:32722	808 population served	2012
STAR WWTPHW:34319	808 population served	2012
CLEVELAND WWTPHW:34374	808 population served	2012
GLENWOOD STP and COLLECTIONHW:38592	808 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.