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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
SAUK PRAIRIE SC STPHW:394037,413 population served2012
BOAZ SLAB CREEK WWTPHW:249917,411 population served2012
COCHRAN WWTPHW:270547,411 population served2012
OAKMONT BORO STPHW:367287,411 population served2012
MARSHALL STPHW:310597,409 population served2012
SuffolkC0SD 1 Port Jefferson STPHW:335367,407 population served2012
NEW BALTIMORE W W T PHW:309587,405 population served2012
ROCKTON SEWAGE TREATMENTHW:276807,400 population served2012
CYNTHIANA STPHW:301047,400 population served2012
Hondo WWTPHW:380817,400 population served2012
LITCHFIELD STPHW:278957,399 population served2012
WARRENTON STPHW:361997,385 population served2012
Great Barrington Public WorksHW:307627,383 population served2012
BIG STONE GAP WWTP and COLLECTION SYSHW:383227,381 population served2012
NARRAGANSETT SCARBOROUGHHW:370597,379 population served2012
Russian River County WWTFHW:258017,377 population served2012
ROCKLAND WWTFHW:304477,376 population served2012
RONCEVERTE WWTPHW:388487,369 population served2012
SANDPOINT S_T PLANTHW:274117,365 population served2012
GENOA CITY OFHW:276257,360 population served2012
NEW CUMBERLAND BORO STPHW:365087,349 population served2012
WELLS WWTFHW:304557,348 population served2012
WESTON WWTPHW:388947,339 population served2012
PHILADELPHIA POTWHW:315727,330 population served2012
New Carlisle WWTP and Sewer SystemHW:352957,330 population served2012
ST MARTINVILLE STPHW:303107,323 population served2012
Beebe WWTPHW:257567,315 population served2012
PALMERTON BOROHW:363067,314 population served2012
ANGOLA WWTPHW:281667,304 population served2012
CLANTON WALNUT CREEK WWTPHW:251437,300 population served2012
WINTERS WWTFHW:260967,300 population served2012
NEBRASKA CITY WWTPHW:329407,300 population served2012
Rotterdam T SD 2 STP and On SitesHW:337317,300 population served2012
DAYTON STPHW:373627,300 population served2012
HOLMEN WWTPHW:392597,297 population served2012
OAK GROVE WWTPHW:324737,295 population served2012
EDINBORO BORO STPHW:368977,293 population served2012
Bullhead City Section 18 WWTFHW:253437,290 population served2012
Yreka WWTFHW:258097,290 population served2012
Horizon City WWTPHW:376067,290 population served2012
BREVARD WWTPHW:344017,289 population served2012
NORTH VERNON WWTPHW:282897,288 population served2012
BUENA VISTA TWP STPHW:309867,288 population served2012
Fort Bragg WWTPHW:258007,273 population served2012
THOMSON WPCPHW:273017,260 population served2012
OSCODA TWP WWTPHW:308557,248 population served2012
Lake Placid V Sewers and STPHW:337907,245 population served2012
Trumann WWTPHW:257047,243 population served2012
MOUNT POCONO BORO STPHW:364507,237 population served2012
BELLE PLAINE STPHW:313657,235 population served2012
Gowanda V WWTPHW:340927,230 population served2012
Buda WWTPHW:380757,230 population served2012
PAW PAW STPHW:310537,229 population served2012
BELOIT Town of STPHW:396247,226 population served2012
Hubbard WWTP and Sewer SystemHW:351797,218 population served2012
Willits WWTFHW:257997,200 population served2012
Glen Lakes Subregional WWTPHW:269947,200 population served2012
NEWBERRY CO W and SA PLANT 1HW:370857,200 population served2008
Vicksburg WWTPHW:380287,200 population served2012
BEDFORD STPHW:383867,200 population served2012
CLARKSTON STPHW:385577,200 population served2012
ORANGE STPHW:383647,199 population served2012
INVERNESS REG WWTPHW:269037,179 population served2012
WINOOSKI WPCFHW:382917,176 population served2012
SHAWNEE PWA WWT NORTHHW:355577,173 population served2012
JACKSON WWTPHW:392687,170 population served2012
EAST ALTON STPHW:276487,169 population served2012
Heber Springs WWTPHW:255167,165 population served2012
EVERGREEN WWTPHW:264087,165 population served2012
NEW LONDON WWTPHW:393567,161 population served2012
TAZEWELL WWTP and COLLECTION SYSTEMHW:383137,151 population served2012
TORRINGTON LAGOONSHW:396527,151 population served2012
BELEN DISPOSAL PLANTHW:334767,150 population served2012
RENSSELAER MUN WWTPHW:281687,145 population served2012
DEXTER WEST WWTPHW:321277,143 population served2012
COWETA WWTHW:360047,139 population served2012
DILLINGHAM WWTPHW:252637,128 population served2012
CHAPIN WTFHW:372117,126 population served2008
CHESANING STPHW:309877,122 population served2012
Dandridge STPHW:373617,120 population served2012
WHITEFISH WWTPHW:324817,117 population served2012
BATESVILLE POTWHW:313887,113 population served2012
MOUNT UNION BOROHW:365457,103 population served2012
Belpre WWTP and Sewer SystemHW:349927,102 population served2012
Goshen V Sewers and STPHW:336107,101 population served2012
Woodlake WWTFHW:259937,100 population served2012
NORTH MIDDLETON STPHW:365397,099 population served2012
MANHATTAN STPHW:277107,093 population served2012
Palmyra Borough CS_STPHW:333537,091 population served2012
Wauseon WWTP and Sewer SystemHW:354847,091 population served2012
Alexandria Bay V STPHW:338387,088 population served2012
Benton WWTP and Collection SystemHW:279067,087 population served2012
MOUNT HOREB STPHW:393447,083 population served2012
Frankfort North STPHW:275977,082 population served2012
COLUMBIA CITY WWTPHW:281377,077 population served2012
MIDLAND BORO STPHW:366957,058 population served2012
WEST ELIZABETH STPHW:368187,055 population served2012
FAIRFIELD GLADEHW:373807,048 population served2012
WASHINGTON WWTPHW:291117,047 population served2012
Morovis WWTPHW:397647,041 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.