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
BERK CO PSSD AUSTIN WWTPHW:38803	78 population served	2012
EMIDA LAGOON SYSTEMHW:27513	77 population served	2012
AGENDA WWTPHW:29447	77 population served	2012
EMMET WWTPHW:32980	77 population served	2012
FORT RANSOM LAGOONHW:34715	77 population served	2012
ALEXANDER WWTPHW:29702	76 population served	2012
VCUD Pine Island WWTFHW:26889	75 population served	2012
MEADOW LAKE FARM SUBDIVISIONHW:31881	75 population served	2012
HAYS WWTFHW:32542	75 population served	2012
HAZARD WWTPHW:32849	75 population served	2012
Fulton Co Airport Industrial ParkHW:35117	75 population served	2012
Auglaize Co Sherwood Forest WWTPHW:35302	75 population served	2012
TAFTSVILLE STPHW:38293	75 population served	2012
RANDALL WWTPHW:29466	74 population served	2012
LIVONIA WWTFHW:32259	74 population served	2012
DEWEESE WWTPHW:32774	74 population served	2012
GARDNER LAGOONHW:34465	74 population served	2012
Wayne Co Gingery Allotment WWTP and SewersHW:34855	74 population served	2012
LIMA WWTHW:35615	74 population served	2012
Bairoil North LagoonHW:39736	74 population served	2012
KINROSS RUSSHW:28782	73 population served	2012
BU CO SD 16 WWTPHW:29812	72 population served	2012
BEARCREEKHW:32508	72 population served	2012
OAKWOOD WWTHW:35784	72 population served	2012
REUBENS LSASHW:27518	71 population served	2012
HAGUE LAGOONHW:34594	71 population served	2012
PENSACOLA PWA WWTHW:35909	71 population served	2012
ONEIDA WWTPHW:29535	70 population served	2012
LOST SPRINGS SEPTIC TANKSHW:29581	70 population served	2012
CHOCTAW RIDGEHW:31706	70 population served	2012
MARK TWAIN STATE PARK and HHW:32395	70 population served	2012
PEKIN LAGOONHW:34655	70 population served	2012
Williams Co Hillside WWTPHW:34901	70 population served	2012
Kirtland Rockwood Ledges WWTPHW:35200	70 population served	2012
Auglaize Co Arrowhead Estates WWTPHW:35304	70 population served	2012
BRADLEY PSD WALHONDE 2 WWTPHW:38995	70 population served	2012
Nimmons WWTPHW:25626	69 population served	2012
WILLIS WWTPHW:29543	69 population served	2012
Missoula County Spring MeadowHW:32634	69 population served	2012
HEARTWELL WWTPHW:32853	69 population served	2012
BALLTOWN SEPTIC TANKSHW:28502	68 population served	2012
ELSMORE WWTPHW:29554	68 population served	2012
NORTH CASS COUNTY SDHW:31917	68 population served	2012
OAK WWTPHW:32959	68 population served	2012
BUTTE LAGOONHW:34518	68 population served	2012
COBBLESTONE WWTPHW:32056	67 population served	2012
ONG WWTPHW:32969	67 population served	2012
CATHAY LAGOONHW:34543	67 population served	2012
Blackfoot Harbor SubdivisionHW:27536	66 population served	2012
HARBINE WWTPHW:32842	66 population served	2012
BURR WWTPHW:32903	66 population served	2012
FLAXTON LAGOONHW:34578	66 population served	2012
DOLLIVER STPHW:28629	65 population served	2012
EMPORIA LAKE KAHOLA WWTPHW:29593	65 population served	2012
LAKE ADELLE SEWER DISTHW:31925	65 population served	2012
PHENORA SUBD SOUTHHW:31936	65 population served	2012
SCSD1 Compton Ridge WWTPHW:32376	65 population served	2012
BIRNEY N CHEYENNE INDIAN RESERVATIONHW:32620	65 population served	2012
BALTA LAGOONHW:34528	65 population served	2012
WARWICK LAGOONHW:34704	65 population served	2012
Sewer District 9HW:35268	65 population served	2012
PENERMON LAGOONHW:32132	64 population served	2012
Tamworth Village Septic SystemHW:33161	64 population served	2012
DOUGLAS LAGOONHW:34560	64 population served	2012
MANTADOR LAGOONHW:34625	64 population served	2012
Defiance Co Evergreen Office Complex WWTPHW:34947	64 population served	2012
FCPWSD1 EVERGREEN TERRACEHW:32053	63 population served	2012
TWO BUTTES WWTFHW:26414	62 population served	2012
PENDLETON VILLAGE OFHW:32151	62 population served	2012
NOME LAGOONHW:34507	62 population served	2012
HARTVILLE WWTPHW:39667	62 population served	2012
PLANO WWTPHW:28966	61 population served	2012
DAWSON LAGOONHW:34555	61 population served	2012
GOLVA LAGOONHW:34590	61 population served	2012
Pinal County Maricopa HUD WWTPHW:25404	60 population served	2012
SN CO SD 6 WWTPHW:29429	60 population served	2012
AURORA WWTPHW:29446	60 population served	2012
SU CO S D WWTP SUPPESVILLEHW:29814	60 population served	2012
Powell Comm LagoonHW:31949	60 population served	2012
FCPWSD 3 Pine Lake Estates SubdivisionHW:32063	60 population served	2012
Delaware County Home WWTPHW:34779	60 population served	2012
Crawford Co Morton SubdivisionHW:35540	60 population served	2012
STEPHENS 3 Meridian WWTHW:35988	60 population served	2012
HOLLISTER WWTHW:36001	60 population served	2012
CONESTOGA TWP COLEMANVILLE STPHW:36369	60 population served	2012
MullinHW:37806	60 population served	2012
Monroe Dept of Public WorksHW:30813	59 population served	2012
WALNUT RIDGEHW:31895	59 population served	2012
HALSEY WWTPHW:32840	59 population served	2012
DONNYBROOK LAGOONHW:34514	59 population served	2012
Pinal County Stanfield HUD WWTPHW:25405	58 population served	2012
CRAWFORD WPCP 2 WESTHW:27177	58 population served	2012
Letcher Co SD Millstone Alt STPHW:30072	58 population served	2012
MILTON LAGOONHW:34634	58 population served	2012
SOURIS LAGOONHW:34682	58 population served	2012
Schodack T SD5 STPHW:33768	57 population served	2012
MCHENRY LAGOONHW:34622	56 population served	2012
SENTINEL BUTTE LAGOONHW:34677	56 population served	2012
RINARD STLHW:28999	55 population served	2012
SHERMAN TWP STPHW:31142	55 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.