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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
Eaton WWTP and Sewer SystemHW:350888,133 population served2012
WAUKEE STLHW:291158,132 population served2012
ILWACO WASTEWATER TREATMENT PLANTHW:385868,127 population served2012
GLENPOOL USA WWTHW:356738,123 population served2012
YOUNGSVILLE STPHW:302088,120 population served2012
MCCOOK WWTPHW:329128,112 population served2012
City of BloomfieldHW:334958,112 population served2012
Alfred V WWTPHW:340498,112 population served2012
DARLINNGTON_BLACK CREEK PLANTHW:371568,104 population served2008
Van Dyke WWTPHW:270078,100 population served2012
ROSELLE BOTTERMAN STPHW:277818,100 population served2012
Columbiana Co Elkton Regional WWTPHW:348148,100 population served2012
Commerce WWTPHW:378998,100 population served2012
Clyde WWTP and Sewer SystemHW:349438,097 population served2012
PLYMOUTH WPCFHW:265878,093 population served2012
Newport WWTPHW:256388,091 population served2012
GUNTERSVILLE WWTPHW:251718,090 population served2012
Penn Yan V STPHW:340288,086 population served2012
CASCADE SEWAGE LAGOONHW:274518,075 population served2012
Cayuga Heights V STPHW:339638,044 population served2012
Chowchilla WWTPHW:260028,040 population served2012
Adams Dept of Public WorksHW:307238,031 population served2012
MADISON WWTPHW:269518,017 population served2012
LAGRANGE STPHW:299948,010 population served2012
Jasper Town Creek WWTPHW:250538,000 population served2012
ATMORE WWTPHW:251318,000 population served2012
EARLIMART WWTFHW:260048,000 population served2012
FORT LUPTON WWTPHW:263348,000 population served2012
Eagle River WSD EdwardsHW:264658,000 population served2012
QUINCY WWTPHW:269178,000 population served2012
PERRY STPHW:269738,000 population served2012
RICHMOND HILL WPCPHW:272788,000 population served2012
FAZENDVILLE PLANTHW:303718,000 population served2012
Elk Valley WWTFHW:322788,000 population served2012
BROWNING WWTFHW:325938,000 population served2012
ELKHORN WWTPHW:327898,000 population served2012
Waterford T San_Comb Sewer and STPHW:338118,000 population served2012
CONCORD TWP SEW AUTHHW:370428,000 population served2012
Roamingwood Sewer and WaterHW:370488,000 population served2012
WARREN WWTFHW:370728,000 population served2012
Lex Co Joint_Old Barnwell RoadHW:372558,000 population served2008
JEFFERSON CITY WWTPHW:374138,000 population served2012
WHARTON STPHW:376798,000 population served2012
Canada Street WWTPHW:379268,000 population served2012
League City South WWTPHW:379958,000 population served2012
BERK CO PSSD OPEQ_HEDGE WWTPHW:387968,000 population served2012
WELLINGTON WWTPHW:292977,991 population served2012
SALLISAW WWTHW:356317,989 population served2012
Grafton Wastewater SystemHW:307267,987 population served2012
CALIPATRIA WWTFHW:261877,980 population served2012
Dannemora V STPHW:337817,970 population served2012
NEW ALBANY POTWHW:315557,965 population served2012
WASHINGTON TWP FRANKLIN STPHW:364807,962 population served2012
PIGEON CREEK STPHW:367487,956 population served2012
CARO STPHW:309377,954 population served2012
CHESHIRE WPCFHW:265407,950 population served2012
PUTNAM W P C FHW:265897,950 population served2012
MOLALLA STPHW:360307,950 population served2012
SUTHERLIN STPHW:361917,950 population served2012
DONALDSONVILLE STPHW:302187,949 population served2012
CALIFORNIA STPHW:368177,946 population served2012
POTEAU PWA WWTHW:356217,939 population served2012
GREENVILLE STPHW:308847,935 population served2012
MOREHEAD CITY WWTPHW:341687,931 population served2012
CARBONDALE NWWTPHW:275487,929 population served2012
SMITHVILLE WWTPHW:318697,925 population served2012
LAFAYETTE NORTHEAST OXID PONDHW:301557,914 population served2012
RHINELANDER STPHW:394187,908 population served2012
Monticello V WWTPHW:337007,902 population served2012
Northwest Regional WWTFHW:268467,900 population served2012
KENNEBUNK STPHW:304287,900 population served2012
West ClevelandHW:380127,900 population served2012
Newmarket WWTFHW:332087,868 population served2012
METROPOLIS STPHW:279327,867 population served2012
WILLIAMSON WWTPHW:389397,865 population served2012
SALEM STPHW:278137,863 population served2012
ROBINSON STPHW:278647,862 population served2012
RUSSELLVILLEHW:300387,854 population served2012
MARIETTA DONEGAL STPHW:363097,854 population served2012
PERRY WWTPHW:289627,851 population served2012
PINE GROVE STPHW:363387,820 population served2012
Carneys Point Township CS Septic_STPHW:333387,816 population served2012
GRAND LEDGE WWTPHW:308267,813 population served2012
JACKSON CSHW:302467,811 population served2012
MANISTEE STPHW:311797,805 population served2012
PRESQUE ISLE WWTFHW:303987,800 population served2012
Kingston Sewer CommissionHW:308087,800 population served2012
Columbiana WWTP and Sewer SystemHW:348227,800 population served2012
PARIS WWTPHW:374837,797 population served2012
Globe WWTFHW:252897,790 population served2012
HOOD RIVER STPHW:361357,788 population served2012
CLINTON COLLECTION SYSHW:371547,788 population served2008
SALT ROCK PSD WWTPHW:388227,788 population served2012
CHARLES CITY WWTPHW:285607,787 population served2012
SCOTTDALE EVERSON STPHW:367127,781 population served2012
BOSQUE FARMS WWTPHW:334867,780 population served2012
SEDALIA NORTH WWTPHW:317497,770 population served2012
WAHPETON LAGOONHW:347017,766 population served2012
Riverside Township CS_Septics_STPHW:333647,765 population served2012
LAPEER STPHW:309187,759 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.