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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
BOONE WWTPHW:2852712,803 population served2012
Lake County DPW New Century TownHW:2777912,800 population served2012
Farmington T STPHW:3399512,790 population served2012
Roselle JL Devlin WWTPHW:2778212,750 population served2012
AUBURN WWTPHW:2804312,731 population served2012
Corcoran WWTFHW:2610312,721 population served2012
TARBORO WWTPHW:3422712,704 population served2012
YANKTON WWTPHW:3728412,703 population served2012
Mercedes WWTPHW:3763312,700 population served2012
COLDWATERHW:3106312,697 population served2012
MOUNDSVILLE WWTPHW:3891712,666 population served2012
MARSHALL WWTPHW:3172812,665 population served2012
Hornell C WPCPHW:3401512,660 population served2012
Atlantic Beach WWTFHW:2665912,655 population served2012
Verona Township CS_STPHW:3328112,651 population served2012
TWAIN HARTE WWTFHW:2605312,648 population served2012
AUBURN WWTFHW:2599912,634 population served2012
FRONT ROYAL STPHW:3843912,627 population served2012
GOGEBIC IRON WWA STPHW:3113012,612 population served2012
Rosamond WWTFHW:2618212,600 population served2012
EAST HAMPTON WPCFHW:2654712,600 population served2012
GROTON CITY WPCFHW:2655812,600 population served2012
TULSA LOWER BIRD CREEK WWTHW:3566712,578 population served2012
Plymouth WWTFHW:3318212,561 population served2012
Marion WWTPHW:2554012,543 population served2012
CHESTERTON WWTPHW:2803012,525 population served2012
HOLLIDAYSBURG STPHW:3662312,525 population served2012
N HUNTINGDON TWP YOUGHIOGHENY STPHW:3673712,521 population served2012
STORM LAKE WWTPHW:2906312,515 population served2012
GREEN RIVER LAGOONHW:3971612,515 population served2012
Celina WWTP and Sewer SystemHW:3496812,503 population served2012
Shady Hills Subregional WWTFHW:2683812,500 population served2012
Mount Dora WWTP 1HW:2694312,500 population served2012
PALATKA STPHW:2696712,500 population served2012
BEDFORD WWTPHW:2813812,500 population served2012
Stony Point T STPHW:3364912,500 population served2012
HAVELOCK WWTPHW:3419912,500 population served2012
Millington STP 2HW:3745612,500 population served2012
JEFFERSON COUNTY TURKEY CREEK WWTPHW:2511812,499 population served2012
TRUSSVILLE WWTPHW:2511912,499 population served2012
QUAKERTOWN BOROHW:3622712,493 population served2012
ROCKINGHAM WWTPHW:3436112,459 population served2012
CANTON MUN FAC HYDROGRAPH CONTROLHW:3141412,452 population served2012
KEOKUK WWTPHW:2877512,451 population served2012
Mountain Home WWTPHW:2547912,448 population served2012
IRCUD_Central WWTFHW:2677612,445 population served2012
BARABOO STPHW:3909312,444 population served2012
EL DORADO WWTPHW:2980112,443 population served2012
Harrison Township Gloucester CS_Septics_STPHW:3334912,417 population served2012
WARSAW WWTPHW:2830112,415 population served2012
DUBOIS CITY STPHW:3691112,413 population served2012
FERGUS FALLS STPHW:3121912,400 population served2012
WINCHESTER STPHW:3754312,393 population served2012
WOODSTOCK NORTH STPHW:2775612,385 population served2012
WOODSTOCK SOUTH STPHW:2775712,385 population served2012
EVANS STPHW:2634412,380 population served2012
Springboro WWTP and Sewer SystemHW:3542312,380 population served2012
North Hempstead T BelgraveHW:3352312,377 population served2012
MARYLAND CITY WWTPHW:3052612,374 population served2012
WILLIAMSPORT WEST STPHW:3660412,374 population served2012
Cottonwood WWTFHW:2538312,365 population served2012
Eloy WWTFHW:2537112,360 population served2012
EVANSTON WWTPHW:3971912,359 population served2012
Sabana Grande WWTPHW:3976312,357 population served2012
LIVINGSTON WWTPHW:3250912,354 population served2012
BEATRICE WWTPHW:3266812,352 population served2012
MCCALL SEWAGE LAGOONHW:2745312,349 population served2012
BIG RAPIDS WWTPHW:3101512,344 population served2012
DENHAM SPRINGS WWTPHW:3027912,342 population served2012
GRAND RAPIDS STPHW:3124312,340 population served2012
EFFINGHAM WWTP and COLLECTION SYSTEMHW:2773212,339 population served2012
Milford WWTFHW:3319012,307 population served2012
Cedar Grove Township CS_STPHW:3326412,300 population served2012
ESCANABA WWTPHW:3101012,297 population served2012
SELINSGROVE STPHW:3663312,279 population served2012
CONWAY WWTFHW:3715512,266 population served2008
London WWTP and Sewer SystemHW:3522512,250 population served2012
Englewood WWTP and Sewer SystemHW:3509612,235 population served2012
OTTAWA WWTPHW:2949812,225 population served2012
SHOAL CREEK WWTPHW:3200512,221 population served2012
FORTUNA WWTFHW:2578812,207 population served2012
ALEXANDER CITY SUGAR CREEK WWTPHW:2497412,201 population served2012
ALEXANDER CITY COLEY CREEK WWTPHW:2497512,201 population served2012
Imperial Valley WWTPHW:3800912,200 population served2012
WEST RICHLAND SEW TRT FACHW:3867912,200 population served2012
WABASH WWTPHW:2816012,191 population served2012
DURBIN REGIONAL PLANTHW:3723612,191 population served2008
Camden WWTPHW:2543512,183 population served2012
Exeter WWTFHW:3320412,170 population served2012
PENN HILL MUN PLUM CREEK STPHW:3680612,168 population served2012
Blythe Regional WWTFHW:2619012,155 population served2012
FORT ATKINSON STPHW:3956812,151 population served2012
GREENVILLE STPHW:3686012,140 population served2012
LOVINGTON STPHW:3344312,137 population served2012
CLAYTON WWTPHW:3428212,126 population served2012
MILTON REGIONAL STPHW:3667712,124 population served2012
SCOTTS VALLEY WWTFHW:2588812,121 population served2012
NEW RICHMOND STPHW:3935712,121 population served2012
Fulton C WWTPHW:3394612,115 population served2012
Kilgore WWTPHW:3789812,100 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.