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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in the United States

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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

CompareNameNative sizeYear
TUSCALOOSA WWTPHW:25109135,000 population served2012
NCSD_Felix C Davis WWTPHW:37213135,000 population served2008
South Bay WRPHW:26253134,433 population served2012
LFUCG TOWN BRANCH STPHW:29836134,424 population served2012
Trenton City Septics_CS_CSO_STPHW:33380134,252 population served2012
WARREN WWTPHW:30961134,233 population served2012
CHAMBERS CREEKHW:38635134,089 population served2012
MSD Little Miami Drainage BasinHW:35163132,088 population served2012
Alderwood Water and Wastewater DistHW:38537131,138 population served2012
BUCKLIN PT STPHW:37069130,811 population served2012
Terminal Island WWTPHW:25955130,000 population served2012
K C WEST SIDE WWTPHW:31721129,195 population served2012
LANSING WWTPHW:30835129,002 population served2012
Alemeda Sims WWTPHW:38001129,000 population served2012
North Hudson SA Adam St WWTP CS_CSO_STPHW:33268128,879 population served2012
Charles River WPCFHW:30795128,874 population served2012
NAPERVILLEHW:27711128,358 population served2012
E L Huie Casey Natural Treatment SystemHW:27334128,300 population served2012
Hill Canyon WWTPHW:25935128,031 population served2012
San Jacinto Regional WRFHW:26211127,817 population served2012
KCK WWTP 1 KP WWTPHW:29367127,796 population served2012
LANCASTER CITY STPHW:36342127,446 population served2012
DAVENPORT WWTPHW:28610127,142 population served2012
Little Rock Adams Field WWTPHW:25410127,004 population served2012
LFUCG W HICKMAN STPHW:29837126,842 population served2012
WAUKEGAN STP NORTH SHORE SDHW:27727126,629 population served2012
Brockton Deptof Public WorksHW:30708126,256 population served2012
Pecan Creek WWTPHW:37830126,220 population served2012
GSWSA_MYRTLE BEACH WWTPHW:37162125,511 population served2008
Simi Valley WWTPHW:25933125,317 population served2012
BLOOMINGTON NORMAL WEST OLD STPHW:27719124,377 population served2012
ARCHIE ELLEDGE WWTPHW:34228124,272 population served2012
KENOSHA WWTPHW:39278124,215 population served2012
SOUTH DURHAM WATER REC FACHW:34222123,750 population served2012
Manatee County SW Regional WWTPHW:26803123,696 population served2012
Evansville WESTSIDE WWTPHW:28105123,582 population served2012
JO CO ICMB WWTPHW:29425123,232 population served2012
BOISE CITY OF LANDER STREETHW:27366122,600 population served2012
NEORSD Westerly WWTPHW:35051122,497 population served2012
Oneida Co Oneida CoWPCPHW:33898122,412 population served2012
ARMY BASE W P C FHW:38488121,846 population served2012
Hillebrandt WWTPHW:37954121,800 population served2012
NORMAN MAIN WWTHW:35636121,400 population served2012
Dublin San Ramon WWTFHW:25832120,722 population served2012
Mesa Northwest WRPHW:25321120,640 population served2012
Chandler Airport WRFHW:25314120,000 population served2012
Pleasant Grove WWTPHW:26092120,000 population served2012
NORTH LAS VEGAS WWTFHW:33147120,000 population served2012
Northwest WWTP HoustonHW:38005120,000 population served2012
NANSEMOND W P C FHW:38490119,865 population served2012
SOUTH BEND WWTPHW:28071119,763 population served2012
SOUTH VALLEY SDHW:38157119,380 population served2012
Amherst T WWTP 16 and OnsitesHW:34082118,995 population served2012
GRESHAM STPHW:36034118,953 population served2012
CEDAR RAPIDS WWTPHW:28554118,645 population served2012
EASTON AREA STPHW:36380118,292 population served2012
Little Patuxent WWTPHW:30545117,556 population served2012
BRIDGEPORT WESTSIDEHW:26536117,525 population served2012
JOHNSTOWN CITY STPHW:36591117,317 population served2012
Hamby WWTPHW:37706116,953 population served2012
Ocean County UA Southern WPCF CS_STPHW:33319116,410 population served2012
BATON ROUGE NORTH WWTPHW:30353116,337 population served2012
VSFCD WWTFHW:25857115,942 population served2012
OSO STPHW:37659115,400 population served2012
IEUA Carbon Canyon WRFHW:26218115,345 population served2012
Crooked Creek WRFHW:27290115,000 population served2012
Mayaguez Regional WWTPHW:39762114,939 population served2012
LAWRENCE KAW RIVER WWTPHW:29372114,892 population served2012
HARRISBURG AUTHORITY STPHW:36292114,641 population served2012
Rockaway Valley RSA CS_STPHW:33255114,549 population served2012
WATERBURY WPCFHW:26613114,548 population served2012
SUGAR CREEK WWTPHW:34310114,277 population served2012
Central Marin San Agency WWTFHW:25855114,000 population served2012
KENNER STP 3HW:30152113,712 population served2012
Tonawanda T WWTPHW:34096113,687 population served2012
MKEAN MAFFITT WWTPHW:34326113,617 population served2012
Colorado Springs Utilities JD Phillips WRFHW:26470112,961 population served2012
AIKEN WTF_HORSE CREEK TFHW:37228112,727 population served2008
PROVOHW:38150112,488 population served2012
READING AREA FRITZ ISLAND STPHW:36329112,212 population served2012
WLSSD REGIONAL WWTFHW:31213110,074 population served2012
BOULDER 75TH STREET WWTPHW:26277110,000 population served2012
GWINNETT YELLOW_SWEET WPCPHW:27030110,000 population served2012
Warren Co Lower Little Miami WWTPHW:35479110,000 population served2012
Murfreesboro Sinking Creek STPHW:37466110,000 population served2012
WYOMING WWTPHW:30900109,891 population served2012
Midland Plant 1 WWTPHW:37595109,885 population served2012
GRANITE CITY REGIONAL WWTP and COLL SYSTEMHW:27650109,607 population served2012
Broadway WWTPHW:37660109,500 population served2012
Perris Valley Regional WRFHW:26213109,315 population served2012
Woodlands WWTPHW:38045109,166 population served2012
New Bedford Wastewater DistrictHW:30720108,829 population served2012
ST CLOUD WWTFHW:31226108,526 population served2012
Peoria Butler WRFHW:25338107,800 population served2012
FRWRD South Main STPHW:27749107,656 population served2012
PUEBLO WWTPHW:26276107,577 population served2012
COX CREEK WWTPHW:30525107,272 population served2012
MONTGOMERY CATOMA CREEK WWTPHW:25065107,251 population served2012
Ventura Water Reclamation FacilityHW:25934107,166 population served2012
OCUD_Eastern Subregional WRFHW:26681107,000 population served2012

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.

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.