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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
South Cross Bayou WWTPHW:26713207,750 population served2012
Upper Blackstone Abatement DistrictHW:30709207,535 population served2012
POINT WORONZOF JOHN ASPLUND WWTPHW:25259205,373 population served2012
OCEAN CITY WWTPHW:30644205,000 population served2012
RAGNONE DIST2 WWTPHW:30922203,019 population served2012
EAST BANK PLANTHW:30358200,000 population served2012
LOWER BUCKS CO JMA LEVITTOWNHW:36278199,498 population served2012
THERESA STREET STPHW:32895198,164 population served2012
Moreno Valley Regional WRFHW:26212196,495 population served2012
Southern Regional WWTPHW:26721195,000 population served2012
Oceanside WPCPHW:25845194,000 population served2012
Ponce Regional WWTPHW:39768193,648 population served2012
HEYBURN STATE PARK S_T FAHW:27501192,882 population served2012
MISSOURI RIVER STPHW:32964190,290 population served2012
BUCKMAN STREET STPHW:26661190,000 population served2012
ROCK RIVER WRDHW:27678189,346 population served2012
Western Virginia Water Auth WWTPHW:38431189,278 population served2012
HONOULIULI WWTPHW:27346188,905 population served2012
BUNCOMBE COUNTY MSD WWTPHW:34157188,589 population served2012
NEW HAVEN EAST SHORE WPCFHW:26575187,888 population served2012
SHREVEPORT LUCAS WWTPHW:30373187,000 population served2012
SALT LAKE CITYHW:38146186,440 population served2012
Canton WWTP and Sewer SystemHW:35022186,357 population served2012
NEW ORLEANS W BANK STPHW:30361185,672 population served2012
Victor Valley Regional WWRPHW:26168185,376 population served2012
SPRINGFIELD SW WWTPHW:31753183,235 population served2012
South Central WWTFHW:26716182,805 population served2012
ALLENTOWN CITY STPHW:36294181,767 population served2012
ERIE CITY STPHW:36882181,206 population served2012
TULSA NORTHSIDE WWTHW:35665180,016 population served2012
MISSOURI RIVER WWTPHW:31744179,931 population served2012
San Luis Rey WWTPHW:26258178,575 population served2012
Gloucester County UA CS_STPHW:33346173,650 population served2012
Rockland County Co SD1HW:33646173,503 population served2012
MARRERO PLANTHW:30357173,101 population served2012
Erie Co SD3 Southtowns STPHW:34086172,589 population served2012
Rowlett Creek WWTPHW:37829170,340 population served2012
SPFLD METRO SD SPRING CREEK WWTPHW:27693168,578 population served2012
Waco Regional WWTPHW:37563166,367 population served2012
Hampton WWTFHW:33205165,319 population served2012
SUNNYVALE WWTFHW:25833164,522 population served2012
WESTERN BRANCH WWTPHW:30547164,252 population served2012
PEORIA STPHW:27702163,850 population served2012
Lynn Water and Sewer CommissionHW:30695163,820 population served2012
Latham WWTPHW:26246163,559 population served2012
Ten Mile Creek WWTPHW:37565163,500 population served2012
HARVEY PLANTHW:30355163,451 population served2012
KALAMAZOO WWTPHW:30845163,275 population served2012
Valencia WRPHW:25950163,000 population served2012
Whittier Narrows WRPHW:25946162,611 population served2012
Pomona WRPHW:25944162,200 population served2012
BETHLEHEM CITY STPHW:36307160,604 population served2012
Lancaster WRPHW:25951160,000 population served2012
Clear Creek WWTFHW:26040158,803 population served2012
Pensacola Central Water ReclamationHW:26690158,500 population served2012
TZ OSBOURNE WWTPHW:34253158,400 population served2012
Haskell St WWTPHW:37602157,000 population served2012
SUNRISE STP NO 3 SawgrassHW:26646154,250 population served2012
THOMAS P SMITH WTPHW:26696154,170 population served2012
IEUA Regional Plant No5HW:26217153,100 population served2012
UTOY CREEK WWTPHW:27014152,541 population served2012
SIOUX FALLS WWT FACILITYHW:37295152,475 population served2012
Fairfield Suisun WWTPHW:25849152,000 population served2012
COLDWATER CREEK WWTPHW:31743150,980 population served2012
PISCATAWAY WWTPHW:30548150,827 population served2012
Palmdale WRPHW:25952150,000 population served2012
Conserve IIHW:26677150,000 population served2012
N KY SD1 Western Regional STPHW:29860150,000 population served2012
ANN ARBOR WWTPHW:30970149,690 population served2012
Lowell Regional Wastewater UtilityHW:30737149,596 population served2012
Everett WWTPHW:38576149,264 population served2012
TULSA SOUTHSIDE WWTHW:35664148,573 population served2012
Youngstown WWTP and Sewer SystemHW:35526148,118 population served2012
Gilbert Neely WWTFHW:25317147,400 population served2012
Hayward WPCFHW:25841147,113 population served2012
Fort Collins Drake WW Reclamat FacHW:26280146,762 population served2012
Bakersfield WWTP 2HW:25975146,363 population served2012
SANTA CRUZ WWTFHW:25890145,995 population served2012
Oro Loma WWTFHW:25858145,600 population served2012
BOISE CITY OF WEST BOISEHW:27367145,583 population served2012
San Mateo WWTFHW:25854145,044 population served2012
Mesa Greenfield WRPHW:25322143,640 population served2012
KUWAHEE WWTPHW:37423143,454 population served2012
Michelson WRPHW:26230143,072 population served2012
Hale Avenue RRFHW:26254142,952 population served2012
MUSKEGON CO METRO STPHW:30872141,763 population served2012
TRI CITY WPCPHW:36027141,676 population served2012
PRESIDENT STREET WPCPHW:27040141,235 population served2012
Bakersfield WWTP 3HW:25976141,000 population served2012
YORK RIVER W P C FHW:38486140,262 population served2012
CLARKSVILLE WWTPHW:37345140,000 population served2012
Nashville Dry Creek WWTPHW:37469139,127 population served2012
CAYCE WWTPHW:37089139,000 population served2008
Caguas Regional WWTPHW:39788138,038 population served2012
RACINE STPHW:39408137,701 population served2012
Scottsdale Water Campus WRPHW:25328136,208 population served2012
DELCORA CHESTER STPHW:36248135,976 population served2012
MEDFORD STPHW:36068135,520 population served2012
COLUMBIA REGIONAL WWTPHW:31712135,465 population served2012
COBB CO SO COBB WPCPHW:27021135,112 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.