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
BIGFORK STPHW:31302	591 population served	2012
CORN WWTHW:36014	591 population served	2012
Western Lawrence Co WWTDHW:25601	590 population served	2012
OXFORD JCT WWTPHW:28949	590 population served	2012
WINCHESTER WWTPHW:29415	590 population served	2012
FCPWSD 3 Charing CrossHW:32059	590 population served	2012
HOMER WWTPHW:32862	590 population served	2012
Yah ta hayHW:33519	590 population served	2012
SPRINGER WWTHW:35752	590 population served	2012
MYTONHW:38188	589 population served	2012
WALSH WWTPHW:26347	588 population served	2012
NEW BROCKTON WWTPHW:25201	587 population served	2012
NELSON WWTPHW:32951	587 population served	2012
CASCO WWTPHW:39142	587 population served	2012
MINONG STPHW:39335	587 population served	2012
ALTOONA LAGOONHW:24976	586 population served	2012
MER ROUGE STPHW:30168	586 population served	2012
NEW LOTHROP WWTPHW:31200	586 population served	2012
KELSO WWTPHW:32100	586 population served	2012
ALBION STLHW:28469	585 population served	2012
FANCY FARM STPHW:30071	585 population served	2012
LOCH ALPINE STPHW:30976	585 population served	2012
CEDAR BLUFFS STPHW:32727	585 population served	2012
GWINNER LAGOONHW:34593	585 population served	2012
SANTA FERNWOOD S_T FACILITYHW:27410	584 population served	2012
TITONKA WWTPHW:29084	584 population served	2012
STRONG CITY WWTPHW:29598	584 population served	2012
HAVILAND WWTPHW:29828	584 population served	2012
MCBAIN STPHW:31177	584 population served	2012
Rock Creek WWTP and Sewer SystemHW:34844	584 population served	2012
Highfill WWTPHW:25485	583 population served	2012
CAMDEN STPHW:28213	583 population served	2012
LOVILIA STLHW:28829	583 population served	2012
NORWAY WWTPHW:28930	583 population served	2012
HANOVER WWTPHW:29314	583 population served	2012
GLENCOE NW WWTHW:35947	583 population served	2012
GRESHAM WWTPHW:39241	583 population served	2012
KIELER SD 1 STPHW:39576	583 population served	2012
STAUNTON WWTPHW:28060	582 population served	2012
GIBSON WWTPHW:34388	582 population served	2012
INDIANA CO MSA MARION CENTERHW:36781	582 population served	2012
Junction City WWTPHW:25747	581 population served	2012
PAXTON WWTPHW:32987	581 population served	2012
TURTLE LAKE LAGOONHW:34695	581 population served	2012
Stoutsville WWTP and SewersHW:35427	581 population served	2012
RED OAK PWA WWTHW:35865	581 population served	2012
FRIENDLY PSD WWTPHW:39021	581 population served	2012
ROBERTS S_T FACILITYHW:27491	580 population served	2012
INDIANA CO MSA SHELOCTA STPHW:36779	580 population served	2012
Graford WWTPHW:37859	580 population served	2012
Lovelady WWTPHW:37973	580 population served	2012
BRISTOL CORE AREA WTSHW:38302	580 population served	2012
BALDWIN WPCPHW:27142	579 population served	2012
JULIAETTA STPHW:27430	579 population served	2012
LA CROSSE WWTPHW:28311	579 population served	2012
MONTROSE WWTPHW:32264	579 population served	2012
EFFINGHAM WWTPHW:29359	578 population served	2012
Caledonia WWTP and Sewer SystemHW:34884	578 population served	2012
MULBERRY WWTPHW:29494	577 population served	2012
CLARENCE WWCTSHW:30283	577 population served	2012
LAHOMA WWTHW:35796	577 population served	2012
PENN COVE SD STPHW:38774	577 population served	2012
Joiner WWTPHW:25682	576 population served	2012
THE MEADOWS LLCHW:27459	576 population served	2012
MACCLESFIELD WWTPHW:34225	576 population served	2012
WAUBAY STPHW:37300	576 population served	2012
BURT STLHW:28541	575 population served	2012
POLO WWTPHW:32383	575 population served	2012
FLOYD STPHW:38407	575 population served	2012
RADCLIFFE LAGOONHW:28985	574 population served	2012
SABULA STPHW:29199	574 population served	2012
UNIONVILLE STPHW:30944	574 population served	2012
MCKEAN TWP COLONIAL VILLAGE STPHW:36905	574 population served	2012
PINSON LAGOONHW:37556	574 population served	2012
DEKALB POTW NUMBER 1HW:31447	573 population served	2012
STAUNTON RIVER LAGOONHW:38420	573 population served	2012
WAUSAUKEE WWTPHW:39502	573 population served	2012
Subiaco WWTPHW:25669	572 population served	2012
CANTERBURY LAKES WWTPHW:26987	572 population served	2012
New Boston WWTPHW:27801	572 population served	2012
STEWART WWTFHW:31290	572 population served	2012
PARKTON WWTPHW:34365	572 population served	2012
HOYT WWTPHW:29366	571 population served	2012
PECK STPHW:30952	571 population served	2012
GRACEVILLE LAGOONHW:31292	571 population served	2012
ROLLING FORK POTW EASTHW:31594	571 population served	2012
AURORA WWTPHW:34136	571 population served	2012
CENTER LAGOONHW:34545	571 population served	2012
Moscow LagoonHW:37461	571 population served	2012
Alpine SD WWTFHW:25269	570 population served	2012
FOWLER WWTPHW:29329	570 population served	2012
FAIRMOUNT STPHW:30620	570 population served	2012
CLEAR SPRING WWTPHW:30632	570 population served	2012
BYRON WWTFHW:30843	570 population served	2012
SMITHTON WWTPHW:32042	570 population served	2012
StArmand T STP and Onsite SystemsHW:33789	570 population served	2012
WASHINGTON WWTHW:35887	570 population served	2012
JEFFERSONVILLE WPCFHW:38300	570 population served	2012
CLAYTON STPHW:39155	570 population served	2012
BADGER STLHW:28501	569 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.