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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
HOBART PWA WWTHW:358613,997 population served2012
RIO VISTA WWTFHW:261073,992 population served2012
Booneville WWTPHW:256663,990 population served2012
Haskell South WWTPHW:257293,990 population served2012
Fairfield Co Little Walnut SycamoreHW:352553,988 population served2012
MONT ALTO STPHW:365193,985 population served2012
POPLARVILLE POTWHW:315793,983 population served2012
DALLAS WWTPHW:342353,980 population served2012
Newport WWTFHW:332223,977 population served2012
EAST PRAIRIE WWTPHW:321083,976 population served2012
NOWATA MA WWTHW:359293,971 population served2012
ELDORADO SPRINGS WWTPHW:321863,970 population served2012
BRANDENBURG STPHW:299373,969 population served2012
Fairbury STP and Collection SystemHW:278853,968 population served2012
Peterborough WWTFHW:331923,967 population served2012
PLATTE CITY WWTPHW:318563,961 population served2012
WHITELAND WWTPHW:280063,958 population served2012
PLYMOUTH WWTPHW:344223,958 population served2012
KEWASKUM WWTPHW:392803,956 population served2012
NEWPORT BORO STPHW:364913,953 population served2012
TALLASSEE LAGOONHW:251073,950 population served2012
ALGOA REGIONAL WWTFHW:317173,950 population served2012
RIGBY STPHW:274903,945 population served2012
Hampstead WWTP and Coll SysHW:305323,945 population served2012
COLUMBIA STPHW:298763,944 population served2012
EMMETSBURG WWTPHW:286663,940 population served2012
Post WWTPHW:377183,940 population served2012
COZAD WWTPHW:327533,935 population served2012
OTSEGO STPHW:311673,934 population served2012
Minerva WWTP and Sewer SystemHW:352813,934 population served2012
UNITY TWP 14 Mile STPHW:367933,930 population served2012
KEMMERER WWTPHW:396983,928 population served2012
LAFAYETTE STPHW:361383,925 population served2012
Goodyear Rainbow Valley WRFHW:253363,920 population served2012
BEATTYVILLE STPHW:299283,918 population served2012
JONESBORO NORTH PONDHW:302673,914 population served2012
Owego V STPHW:339613,911 population served2012
COOPERSVILLE STPHW:309013,910 population served2012
CATOOSA WWTHW:356683,908 population served2012
FISHERSVILLE STPHW:384573,908 population served2012
Carey WWTP and Sewer SystemHW:348953,901 population served2012
DALLAS COUNTY WandS WWTPHW:252173,900 population served2012
HAYNESVILLE STPHW:302323,900 population served2012
Cohasset Dept of Public WorksHW:307673,900 population served2012
Liberty T Swan Lake SDHW:336603,900 population served2012
CAMDEN STPHW:371493,900 population served2008
Pulaski STPHW:374903,900 population served2012
Madisonville WWTPHW:377843,900 population served2012
CLARKSVILLE STPHW:379013,900 population served2012
OCEANA WWTPHW:390493,900 population served2012
Bluffton WWTP and SewersHW:349973,896 population served2012
FREEDOM SEWAGE SYSHW:365933,885 population served2012
Delhi V WWTPHW:337443,883 population served2012
CHILTON STPHW:391533,881 population served2012
Pepperell Dept of Public WorksHW:307533,880 population served2012
SPRING CITY BORO STPHW:362253,880 population served2012
JOHNSON WPCHW:382463,874 population served2012
MILTON W P CHW:382523,871 population served2012
FRUITLAND WWTPHW:306403,870 population served2012
SPENCER WWTHW:356543,870 population served2012
CARTHAGE WWTPHW:373373,870 population served2012
MILLBROOK WWTPHW:252323,868 population served2012
CRESCO WWTPHW:291663,868 population served2012
LANCASTER STPHW:392933,868 population served2012
MARSHALL STPHW:393153,864 population served2012
LOUISIANA WWTPHW:322553,863 population served2012
BOWIE STATE COLLEGE STPHW:306593,857 population served2012
PARIS UTILITY DIST W P CHW:304433,856 population served2012
SCOTT CITY WWTPHW:297333,855 population served2012
KNOXVILLE STPHW:277403,854 population served2012
Pittsfield WWTFHW:304443,852 population served2012
Minneola WWTFHW:267823,850 population served2012
SWANTON WPCFHW:382813,850 population served2012
Piggott WWTPHW:255103,849 population served2012
PESHTIGO WWTPHW:393843,849 population served2012
BELTLINE PLANTHW:371673,845 population served2008
PAOLI WWTPHW:283353,844 population served2012
PIEDMONT WWTHW:356453,840 population served2012
COUSHATTA WWTPHW:302943,838 population served2012
OLEY TWP MUN AUTHHW:363883,838 population served2012
ATTICA WWTPHW:282473,837 population served2012
EVERSON S_T FACILITYHW:387073,837 population served2012
COBB CO NORTHWEST WPCPHW:270243,832 population served2012
MILLEN WPCPHW:272543,830 population served2012
Greene Co Cedarville WWTP and SewersHW:350293,828 population served2012
IMLAY CITY STPHW:309173,821 population served2012
KANE BORO PINE STREET STPHW:368723,821 population served2012
STONINGTON MYSTIC WPCFHW:266033,820 population served2012
PETOSKEY WWTPHW:311233,816 population served2012
Vilonia WWTPHW:256073,815 population served2012
MUNCY BORO STPHW:366893,815 population served2012
KIEL STPHW:392823,812 population served2012
TONGANOXIE WWTPHW:295443,808 population served2012
Willcox WWTFHW:252813,807 population served2012
Westfield V WWTPHW:340783,806 population served2012
MERCER BORO STPHW:369033,806 population served2012
WILLIAMSTON WTPHW:308403,803 population served2012
Dane Iowa WWTFHW:393773,802 population served2012
Quartzsite WWTPHW:253893,800 population served2012
BRAIDWOOD STPHW:276553,800 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.