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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
SONORA WWTPHW:2604816,969 population served2012
Fredonia V WWTPHW:3407116,952 population served2012
ALTUS SE WWTHW:3554316,943 population served2012
FOURTH CREEK WWTPHW:3427316,912 population served2012
BRISTOL WWTFHW:3707316,900 population served2012
Lancaster Upper Hocking WWTPHW:3520916,897 population served2012
EAST STROUDSBURG BORO STPHW:3642516,888 population served2012
PICAYUNE POTWHW:3157316,878 population served2012
LONDONHW:3000516,876 population served2012
Newburyport WPCFHW:3075216,866 population served2012
ROLLA SE WWTPHW:3173416,861 population served2012
ANSONIA WPCFHW:2653316,854 population served2012
Salem WWTP and Sewer SystemHW:3539316,850 population served2012
MT CLEMENS WWTPHW:3095716,848 population served2012
GRAMBLING STPHW:3013516,847 population served2012
Sand Dunes WWTPHW:3861316,836 population served2012
Blasdell V WWTPHW:3408316,824 population served2012
SUSANVILLE REG WWTFHW:2616316,814 population served2012
SPRING TOWNSHIP STPHW:3632616,813 population served2012
SILVER LAKE STPHW:3760116,810 population served2012
West Port WWTPHW:2674716,800 population served2012
Suffolk Co SCSD 11 SeldonHW:3355416,800 population served2012
MONTPELIER WPCFHW:3825316,800 population served2012
PRICE RIVER WIDHW:3817316,782 population served2012
MORGAN CITY SD 1 WWCTSHW:3017416,779 population served2012
PELHAM WWTPHW:2512116,739 population served2012
Greenfield Wastewater FacilityHW:3070316,736 population served2012
OOSTANAULA WWTPHW:3731516,723 population served2012
FESTUS CRYSTAL CITY WWTPHW:3188316,722 population served2012
KIRKSVILLE WWTPHW:3172716,704 population served2012
Broad River Regional WWTPHW:3725716,700 population served2008
Town Creek WWTPHW:3795216,700 population served2012
Bryant WWTPHW:2544516,688 population served2012
FRANKFORT WWTPHW:2814516,662 population served2012
TWELVE MILE CREEK WWTPHW:3440916,657 population served2012
HUDSON WWTPHW:3926316,649 population served2012
LAKE RHODISS WWTPHW:3415916,645 population served2012
Isabela WWTPHW:3974916,640 population served2012
NORTHERN MORAINE WW RECLAMATION DISHW:2772316,639 population served2012
OPELOUSAS STPHW:3017916,634 population served2012
WEST LONGVIEW WWTPHW:3860016,629 population served2012
GEORGETOWN STP 2HW:2997416,603 population served2012
PITTSBURG WWTPHW:2939416,594 population served2012
BROOKINGS WWTPHW:3610516,580 population served2012
RED WING MUNICIPAL WWTPHW:3122416,528 population served2012
BUFFALO WWTMT FACILITYHW:3124616,524 population served2012
Eastern Ohio Regional WW AuthorityHW:3498816,520 population served2012
GREENFIELD WWTFHW:2589716,510 population served2012
SCES Northwest RegionalHW:2668016,500 population served2012
FULTON WWTPHW:3171316,400 population served2012
Portage Co Streetsboro Hudson Regional WWTPHW:3535716,400 population served2012
PENDLETON_CLEMSON REG SEWHW:3713816,400 population served2008
MARTINSBURG WWTPHW:3878816,393 population served2012
JCUA GAUTIER POTWHW:3148116,380 population served2012
PA AMERICAN COATESVILLE WWTPHW:3623516,380 population served2012
STUARTS DRAFT STPHW:3845416,350 population served2012
WESTFIELD WWTPHW:2798616,320 population served2012
LEBANON WWTPHW:2797316,300 population served2012
Oyster Creek WWTPHW:3798116,270 population served2012
MT VERNON WWTP and Collection SystemHW:2754616,269 population served2012
CLARK CREEK WWTP NEWTONHW:3417516,268 population served2012
PLANO STPHW:2788016,256 population served2012
Norwalk WWTP and Sewer SystemHW:3532216,238 population served2012
Hardin Co Water Dist 1 Fort KnoxHW:3008916,220 population served2012
BEAVER DAM WWTPHW:3909916,194 population served2012
LEITH CREEK WWTPHW:3438616,167 population served2012
REIDSVILLE WWTPHW:3437116,140 population served2012
GREENEVILLE STPHW:3739416,126 population served2012
SHELBYVILLE STPHW:3750616,105 population served2012
ZIONSVILLE WWTPHW:2797616,100 population served2012
Geneva C Marsh Creek WWTPHW:3399616,096 population served2012
S BURLINGTON ARPT PKWY WPHW:3827716,089 population served2012
PLAQUEMINE SOUTH STPHW:3018316,087 population served2012
LANSDALE BORO STPHW:3623116,071 population served2012
CARROLLTON LASHW:2710316,064 population served2012
Stephenville WWTPHW:3779616,060 population served2012
SUNNYSIDE POTWHW:3875016,010 population served2012
Carpinteria WWTFHW:2591916,000 population served2012
DURANGO WWTPHW:2636316,000 population served2012
Fleming Island Reg WWTPHW:2675516,000 population served2012
LEMONT WRPHW:2779216,000 population served2012
SHELBYVILLE STPHW:2991516,000 population served2012
MEBANE BRIDGE EDEN WWTPHW:3437016,000 population served2012
Southwest Licking Community WSD WWTP and SewersHW:3517416,000 population served2012
YORK WWTPHW:3716516,000 population served2008
ABERDEEN WWTPHW:3054315,982 population served2012
Delran Township SA CS_Septics_STPHW:3335715,964 population served2012
MENOMONIE WWTPHW:3932515,952 population served2012
Marlborough Easterly WWTFHW:3069915,923 population served2012
Siloam Springs WWTPHW:2577815,916 population served2012
SINKING SPRING STPHW:3631715,903 population served2012
MECHANICSBURG STPHW:3649915,895 population served2012
DIXON SEWAGE TREATMENTHW:2757415,876 population served2012
CLAREMORE WWTHW:3556415,873 population served2012
LAUREL POTW NUMBER 1HW:3152015,863 population served2012
CHICKASHA WWTHW:3554615,850 population served2012
Kent Nrrws_Stevensville_GrasonvilleHW:3060915,826 population served2012
ASPEN CONSOLIDATED WWTPHW:2630715,800 population served2012
PORTLAND STPHW:3766515,800 population served2012
Donna WWTPHW:3762615,790 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.