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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
Comanche WWTPHW:377714,107 population served2012
ALMA WPCPHW:271394,104 population served2012
GRACEVILLE STPHW:269354,101 population served2012
THOMASVILLE HCR LAGOONHW:252304,100 population served2012
CATLETTSBURGHW:298424,100 population served2012
BUNKIE STPHW:301164,100 population served2012
Eastern Correctional Institution WWTPHW:306634,100 population served2012
SULLIVANS ISLAND PLANTHW:372104,100 population served2008
Colorado City WWTPHW:377104,100 population served2012
SAEGERTOWN AREA STPHW:368684,098 population served2012
BOOTHVILLE VENICE STPHW:302884,097 population served2012
CONAWAY WWTP and INTERCEPTOR SYSHW:383184,096 population served2012
RAINBOW CITY LAGOONHW:250894,092 population served2012
LOVELOCK WWTFHW:331394,085 population served2012
FLEETWOOD BORO STPHW:363154,073 population served2012
HAMILTON WWTPHW:251734,072 population served2012
COLLINSVILLE MA WWTHW:356724,072 population served2012
TIPTONVILLE CITY LAGOONHW:375244,070 population served2012
Columbiana Co Gilford Lake WWTPHW:348204,068 population served2012
Ward WWTPHW:255974,067 population served2012
Wintersville WWTP and Sewer SystemHW:355164,067 population served2012
SALISBURY BOROHW:365034,067 population served2012
Madison Co SD STP at CazenoviaHW:339294,065 population served2012
NORTHUMBERLAND BORO STPHW:366934,064 population served2012
ALLEN COUNTY RSDHW:280414,062 population served2012
ELIZABETH TWP BUENA VISTA STPHW:367684,062 population served2012
DYERSVILLE WWTPHW:286434,058 population served2012
LEBANON STPHW:276434,057 population served2012
TAOS SKI VALLEY VILLAGE OFHW:334014,055 population served2012
N WILKESBORO THURMAN STREET WWTPHW:344374,055 population served2012
LARNED WWTPHW:297224,054 population served2012
BEAUFORT WWTPHW:341694,053 population served2012
PORTLAND WPCFHW:265884,050 population served2012
WICHITA WWTP 3HW:292994,050 population served2012
KULPMONT MARION HEIGHTS JT MUNHW:366814,050 population served2012
Upper Potomac River Comm WWTPHW:306734,047 population served2012
WADENA STPHW:313684,047 population served2012
Anahuac WWTPHW:380354,047 population served2012
NEW MILFORD WPCFHW:265774,046 population served2012
FORT GIBSON UA WWTHW:359154,046 population served2012
WINDSOR MAIN WPCHW:382894,045 population served2012
JCUA ESCATAWPAHW:314684,042 population served2012
Oak Harbor WWTP and Sewer SystemHW:353234,041 population served2012
GRANITE FALLS WWTPHW:341644,040 population served2012
HARRODSBURG STPHW:299794,034 population served2012
Medford Lakes Borough CS_Septics_STPHW:333774,034 population served2012
Blytheville North WWTPHW:254264,033 population served2012
BELOIT WWTPHW:296704,033 population served2012
ARAB RILEY MAZE CREEK WWTPHW:249804,025 population served2012
ARAB GILLIAM CREEK WWTPHW:249814,025 population served2012
PCPSD SNOWSHOE VALLEY WWTPHW:389664,025 population served2012
SUTTER CREEK WWTFHW:260564,019 population served2012
WAUKON WWTPHW:291164,019 population served2012
SEYMOUR WWTPHW:394394,014 population served2012
LOWELL STPHW:308974,013 population served2012
MILLSTADT STPHW:276424,011 population served2012
Genesee Water and San DistrictHW:263024,010 population served2012
OGLESBY STPHW:277384,010 population served2012
Jefferson Co Barber s Hollow WWTPHW:351844,008 population served2012
SOUTH MIDDLETON TWP STPHW:365484,007 population served2012
FRASER WWTPHW:263614,005 population served2012
BLOUNTSTOWN STPHW:267424,005 population served2012
JASPER WPCPHW:272324,004 population served2012
Montpelier WWTP and Sewer SystemHW:348984,003 population served2012
SOLDOTNA WWTPHW:252644,000 population served2012
WEAVERVILLE WWTFHW:257824,000 population served2012
C and H SUGAR JOINT WWTPHW:258474,000 population served2012
GYPSUM WWTFHW:263664,000 population served2012
NEWBERRY WWTPHW:266544,000 population served2012
Burnt Store WWTPHW:267464,000 population served2012
Green Cove Springs South WWTFHW:267514,000 population served2012
FORSYTH NORTHEAST WPCPHW:272034,000 population served2012
Cortland Town ofHW:279344,000 population served2012
WESTERN WAYNE RSDHW:281764,000 population served2012
CALVERT CITY STPHW:299424,000 population served2012
Falmouth STPHW:299654,000 population served2012
CADDO PARISH SD 7 WWTFHW:303494,000 population served2012
YARMOUTH WW T PHW:305064,000 population served2012
Berlin WWTPHW:306474,000 population served2012
Suffolk Co SCSD 13 Windwatch STPHW:335524,000 population served2012
Lloyd T STP and On Site SysHW:336734,000 population served2012
Salamanca C WWTPHW:340654,000 population served2012
Marion Co Sewer District 7 Water Reclamation PlantHW:348884,000 population served2012
The Plains WWTP and SewersHW:349324,000 population served2012
Pataskala WWTP and Sewer SystemHW:353354,000 population served2012
HOODLAND STPHW:360324,000 population served2012
CRESWELL STPHW:360534,000 population served2012
BOYERTOWN BORO STPHW:363104,000 population served2012
KIDDER TWP LAKE HARMONY AREAHW:364054,000 population served2012
JENKS TWP MARIENVILLE STPHW:369174,000 population served2012
COUDERSPORT AREA STPHW:369234,000 population served2012
MIDDLE SMITHFIELD TWP STPHW:369934,000 population served2012
ANDERSON CO WW MGMNT_6 and 20HW:371684,000 population served2008
ST STEPHEN WWTPHW:371864,000 population served2008
BJWSA_Shell PointHW:372744,000 population served2008
TELLICO RES DEV AGENCY STPHW:375234,000 population served2012
Joshua WWTPHW:378464,000 population served2012
MANCHESTER WASTEWATER TREHW:382494,000 population served2012
BERK CO PSSD NORTH END WWTPHW:387954,000 population served2012
TALAFOFO DISTRICT WWTFHW:397433,999 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.