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
CONRAD WWTPHW:28589	964 population served	2012
Cayuga V WWTPHW:33911	964 population served	2012
LYONS WWTPHW:32911	963 population served	2012
LOBELVILLE STPHW:37437	963 population served	2012
CORNERSVILLE STPHW:37355	962 population served	2012
CAPRON STPHW:27677	961 population served	2012
DUBACH SOUTH STPHW:30275	961 population served	2012
PARMA WWSLHW:31002	961 population served	2012
Richmond Silver CreekHW:29910	960 population served	2012
Bloomingburg WWTP and Sewer SystemHW:34732	960 population served	2012
POSSUM VALLEY STPHW:36490	960 population served	2012
SAXTONS RIVER WPCFHW:38273	960 population served	2012
GREENFIELD TWP STPHW:36447	959 population served	2012
EVERETT BORO AREA MA STPHW:36566	959 population served	2012
LONG VALLEY SIDHW:38182	958 population served	2012
MONTROSE WWTPHW:28892	957 population served	2012
TABOR WWTPHW:29074	957 population served	2012
MADISON WWTPHW:29780	957 population served	2012
WINDSOR SE LAGOONHW:32317	957 population served	2012
Matamoras WWTP and Sewer SystemHW:35262	957 population served	2012
RINGGOLD SOUTH PLANTHW:30228	956 population served	2012
GENESEE SEWAGE TRT FACILITYHW:27429	955 population served	2012
DUGGER WWTPHW:28063	955 population served	2012
EXIRA STLHW:28671	955 population served	2012
RANDOLPH WWTPHW:32686	955 population served	2012
Mount Victory WWTP and Sewer SystemHW:34911	955 population served	2012
CONFLUENCE BORO STPHW:36479	955 population served	2012
SALTSBURG BORO STPHW:37017	955 population served	2012
EDINBURG STPHW:38344	955 population served	2012
SHELTON WWTPHW:32888	954 population served	2012
Delaware T Callicoon SD _ STPHW:33654	954 population served	2012
ROCKWOOD BORO STPHW:36478	954 population served	2012
BENKELMAN WWTPHW:32694	953 population served	2012
PEPIN WWTPHW:39383	953 population served	2012
VICTOR WWTPHW:29098	952 population served	2012
Dunkirk WWTP and Sewer SystemHW:35079	952 population served	2012
HOOPER WWTPHW:32813	951 population served	2012
Wakeman WWTP and Sewer SystemHW:35477	951 population served	2012
ALLEN WWTHW:35605	951 population served	2012
Leavitt Lake Evaporation PondsHW:26178	950 population served	2012
CLEAR CREEK Regional WWTPHW:26300	950 population served	2012
VERNON STPHW:26980	950 population served	2012
PAALAA KAI WWTPHW:27348	950 population served	2012
PRIMGAR STLHW:28979	950 population served	2012
WEST POINT WWTPHW:29133	950 population served	2012
Town of SumrallHW:31624	950 population served	2012
TUNICA COUNTY UTIL DIST CUTOFFHW:31691	950 population served	2012
NEWMAN GROVE WWTPHW:33055	950 population served	2012
Margaretville V STP NYCDEPHW:33765	950 population served	2012
Hastings T Caughdenoy SD STPHW:33947	950 population served	2012
WOODLAND WWTPHW:34334	950 population served	2012
Sycamore WWTP and Sewer SystemHW:34894	950 population served	2012
Tellico Plains WWTPHW:37522	950 population served	2012
Forest Hills WWTPHW:38047	950 population served	2012
CABLE SD 1 STPHW:39063	950 population served	2012
WABENO SD 1 STPHW:39575	950 population served	2012
WELLSVILLE SW WWTPHW:32148	949 population served	2012
IVA WESTSIDE FACILITYHW:37098	949 population served	2008
Heard County Water AuthorityHW:27207	948 population served	2012
PENTWATER STPHW:31084	948 population served	2012
Hampton Township Hampton Commons CS_STPHW:33397	948 population served	2012
Tannersville V STP NYCDEP ownedHW:33766	948 population served	2012
BUCHANAN WWTPHW:27049	947 population served	2012
UNION BRIDGE WWTPHW:30539	947 population served	2012
WEST WPCPHW:27309	946 population served	2012
WEST LEBANON WWTPHW:28131	946 population served	2012
PRINCETON WWTPHW:28980	946 population served	2012
NEW SALEM LAGOONHW:34481	946 population served	2012
CENTURIA STPHW:39149	946 population served	2012
WAYLAND STLHW:29118	945 population served	2012
Swan Point WWTPHW:30576	945 population served	2012
SHANNON SWG TRT PLTHW:27889	944 population served	2012
CADDO WWTHW:35738	944 population served	2012
MATTHEWS WWTPHW:32093	943 population served	2012
KRAKOW SD 1 STPHW:39606	943 population served	2012
WAYNETOWN WWTPHW:28324	942 population served	2012
SCOOBA POTWHW:31603	941 population served	2012
HUMBOLDT WWTPHW:32804	941 population served	2012
DONNELLSON STPHW:28631	940 population served	2012
DODSON LAGOONHW:30343	940 population served	2012
Willards WWTPHW:30637	940 population served	2012
Minetto T WWTP and On Site SysHW:33949	940 population served	2012
Clinton Co Martinsville Midland WWTPHW:34878	940 population served	2012
OAKLAND STPHW:36162	940 population served	2012
Tenaha WWTPHW:37975	940 population served	2012
LUMPKIN WPCPHW:27244	939 population served	2012
AVON STPHW:27951	939 population served	2012
GAINESVILLE WWTPHW:32245	939 population served	2012
WHITE SULPHUR SPRINGS STPHW:32561	939 population served	2012
SOUTHWEST WARREN TIDIOUTE STPHW:36945	939 population served	2012
MILLTOWN WWTPHW:28229	938 population served	2012
BAXTER WWTPHW:28508	938 population served	2012
Highlandville WWTPHW:32276	938 population served	2012
NECEDAH STPHW:39347	938 population served	2012
OVERBROOK WWTPHW:29515	937 population served	2012
HIGHLAND WWTPHW:39251	937 population served	2012
LOCKWOOD WWTPHW:32407	936 population served	2012
VAN BUREN WWTPHW:28252	935 population served	2012
HWEA CROFTON STPHW:29878	935 population served	2012
DEER RIVER STPHW:31304	935 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.