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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
COLUMBIANA WWTPHW:250082,528 population served2012
POYNETTE WWTPHW:394012,528 population served2012
MARISSA STPHW:276292,527 population served2012
HERINGTON WWTPHW:296412,526 population served2012
DOVER BORO STPHW:365602,526 population served2012
AUDUBON WWTPHW:284972,524 population served2012
Caneadea T Houghton SD STPHW:340532,523 population served2012
Fayetteville Perry Twp RSD WWTPHW:347282,520 population served2012
ALAMO STPHW:373112,519 population served2012
KNOB NOSTER WWTPHW:320252,517 population served2012
Storey CountyHW:331532,517 population served2012
S FULTON WWTPHW:375122,517 population served2012
CONYNGHAM BORO STPHW:364292,515 population served2012
Kalama Wastewater Treatment PlantHW:387122,515 population served2012
FOWLER WWTPHW:282032,514 population served2012
Woodstock WWTFHW:331842,513 population served2012
WARRENTON SOUTHSIDE WPCPHW:273122,512 population served2012
SILVER LAKE WWTPHW:394472,511 population served2012
DAVIS WWTHW:359102,510 population served2012
MOSCOW MILLS CROOKED CREEKHW:322632,509 population served2012
FILER STPHW:274702,508 population served2012
SPENCER WWTPHW:283372,508 population served2012
CONOVER SOUTHEAST WWTPHW:341802,508 population served2012
EAST JORDAN STPHW:311732,507 population served2012
Gibsonburg WWTP and Sewer SystemHW:351442,506 population served2012
Mount Vernon WWTPHW:379322,506 population served2012
PALMYRA WWTPHW:393792,506 population served2012
Apalachicola WWTFHW:267662,504 population served2012
FAIRVIEW TWPHW:370102,504 population served2012
PATOKA LAKE RWSD WWTPHW:282402,503 population served2012
South Grand Canyon Sanitary District Tusayan WWTPHW:252852,500 population served2012
Big Park Improvement DistrictHW:253812,500 population served2012
Camp Verde SD WWTFHW:253852,500 population served2012
Texarkana North WWTPHW:254292,500 population served2012
POPLAR WWTFHW:261542,500 population served2012
LA SALLE WWTPHW:262872,500 population served2012
AVONDALE WWTPHW:263462,500 population served2012
Umatilla WWTFHW:269472,500 population served2012
POLO STPHW:278172,500 population served2012
ALBANY WWTPHW:280802,500 population served2012
CADIZ STPHW:299202,500 population served2012
Suffolk Co SCSD YaphankCommCSTPHW:335502,500 population served2012
Andover WWTP and SewersHW:347232,500 population served2012
Middleport WWTP and Collection SystemHW:347472,500 population served2012
Highland Co Rocky Fork Lake WWTPHW:347682,500 population served2012
Mahoning Co New Middletown WWTPHW:353092,500 population served2012
Summit Co Aurora Shores WWTP 29HW:354382,500 population served2012
WESTFALL TWP STPHW:364532,500 population served2012
INDEPENDENCE CROSS CK STPHW:366982,500 population served2012
VERNON TWP FREDERICKSBURG STPHW:369482,500 population served2012
EAST GREENWICH STPHW:370562,500 population served2012
Blacksburg_Canoe CreekHW:371062,500 population served2008
PAMPLICO WW SYSHW:372492,500 population served2008
JASPER LAGOONHW:374122,500 population served2012
PLEASANT HILL UPLAND RETHW:374882,500 population served2012
Woodbury STPHW:375442,500 population served2012
Dripping Springs WWTPHW:380872,500 population served2012
Vint Hill Farms STPHW:385292,500 population served2012
MARLINTON WWTPHW:389652,500 population served2012
GREENSBORO LAGOONHW:250372,499 population served2012
HUDSON STPHW:310262,499 population served2012
Woodsville WWTFHW:331772,498 population served2012
WEST UNION NORTH WWTPHW:291342,497 population served2012
CROSWELL STPHW:309482,497 population served2012
Charleston WWTPHW:255562,494 population served2012
SAC CITY WWTPHW:290192,492 population served2012
JASONVILLE WWTPHW:281752,490 population served2012
SALINAHW:381432,489 population served2012
Manchester Dept of Public WorksHW:307782,487 population served2012
Clarkdale WWTFHW:253822,486 population served2012
Milford Borough CS_Septics_STPHW:333932,486 population served2012
HANCOCK CO PSD ROUTE 2 WWTPHW:388582,486 population served2012
Ashtabula Co Coffee Creek WWTPHW:348472,485 population served2012
DYER WWTPHW:373702,483 population served2012
PELICAN RAPIDS WWTPHW:312652,482 population served2012
JAY UA WWTHW:355772,482 population served2012
NEOGA STPHW:278942,475 population served2012
Canajoharie V STPHW:337252,475 population served2012
Corinth V STPHW:338072,474 population served2012
CHADBOURN WWTPHW:341922,474 population served2012
GIRARD WWTPHW:295722,473 population served2012
FULTON POTW SOUTHWESTHW:314802,473 population served2012
LAWSON WWTPHW:318682,473 population served2012
Idaho Springs Town ofHW:264482,470 population served2012
Groton V WWTPHW:339662,470 population served2012
Williamsburg WWTP and Sewer SystemHW:355082,470 population served2012
Daingerfield WWTPHW:379172,470 population served2012
RICHMONDHW:381232,470 population served2012
HOMERVILLE WPCPHW:272282,468 population served2012
KENTWOOD LAGOONHW:303172,468 population served2012
MAYVILLE LAGOONHW:346292,464 population served2012
CUMBERLAND STPHW:299552,463 population served2012
Southwest MS Community CollegeHW:315042,463 population served2012
MYRTLE POINT STPHW:361562,460 population served2012
WEST BRANCHHW:291272,454 population served2012
ASHLAND WWTPHW:327292,453 population served2012
EVANS CITY BORO STPHW:367832,453 population served2012
DALEWOOD S D PLANT NO 1HW:314442,450 population served2012
Burton WWTP and Sewer SystemHW:350072,450 population served2012
BERKS COUNTY STPHW:363862,450 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.