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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
Peoria Jomax WRFHW:253376,160 population served2012
TRI BORO MUN AUTHHW:364396,160 population served2012
MT GRETNA AUTH STPHW:363966,145 population served2012
MONTOURSVILLE STPHW:370236,141 population served2012
WINNFIELD STPHW:303446,138 population served2012
EPHRAIMHW:381166,135 population served2012
BEARDSTOWN STPHW:279216,123 population served2012
ROLLIN WOODSTOCK STPHW:310986,123 population served2012
MASON WWTPHW:308386,118 population served2012
Monticello West WWTPHW:255516,117 population served2012
MAQUOKETA WWTPHW:288536,111 population served2012
Wrightstown Borough MUA CS_Septics_STPHW:333666,111 population served2012
HASTINGS STPHW:311176,109 population served2012
WILLOWS WWTFHW:259956,107 population served2012
ELY WWTFHW:331236,100 population served2012
Bolivar STPHW:373286,100 population served2012
Alpine WWTPHW:376106,100 population served2012
Adjuntas WWTPHW:397736,099 population served2012
TECUMSEH UA WWTHW:359636,098 population served2012
HENRYETTA WWTHW:359376,096 population served2012
PURCELL WWTHW:358866,090 population served2012
Beverly City SA CS_STPHW:333556,088 population served2012
Lambertville City SA CS_Septics_STPHW:333836,081 population served2012
GRAFTON WWTPHW:390146,071 population served2012
WEST IRON CO SEWER AUTH STPHW:311616,065 population served2012
TROY WPCHW:382826,063 population served2012
OCONTO WWTPHW:393646,063 population served2012
TROY WWTPHW:323046,057 population served2012
Montague Wastewater SystemHW:307896,051 population served2012
GREENBRIER CO PSD NO 2 WWTPHW:388476,049 population served2012
Suffolk Co SCSD6 Kings Park STPHW:335396,046 population served2012
Ohio County Water_Sewer Dist WWTPHW:300886,043 population served2012
WASHINGTON STP 1HW:276606,038 population served2012
ORANGE CITY WWTPHW:289386,035 population served2012
MORTON STP 3HW:277746,031 population served2012
Wareham Water Pollution Ctrl FacHW:307146,030 population served2012
STEWARTVILLE WWTPHW:312346,017 population served2012
SANDWICH STWHW:275456,009 population served2012
Warren WWTPHW:254936,003 population served2012
WETUMPKA WWTPHW:251146,000 population served2012
MILLIKEN Town ofHW:263806,000 population served2012
Stonecrest WWTFHW:268146,000 population served2012
Silver Springs ShoresHW:268166,000 population served2012
STARKE MUN STPHW:269016,000 population served2012
Lagrange County RUD Region BHW:284466,000 population served2012
PINEVILLE STPand CSOHW:300336,000 population served2012
ARCADIA SEWERAGE SYSTEMHW:301096,000 population served2012
JEANERETTE STPHW:302596,000 population served2012
FARMINGTON WATER POLLUTIOHW:304206,000 population served2012
CARRABASSETT TPHW:305176,000 population served2012
DESOTO WWTPHW:318826,000 population served2012
SEWARD WWTPHW:330236,000 population served2012
Greater Atlantic Beach WRecl DistHW:335306,000 population served2012
Erie Co Huron Basin WWTPHW:350996,000 population served2012
GREENWOOD FURN STATE PARK STPHW:369816,000 population served2012
ESTILL STPHW:371086,000 population served2008
BJWSA_St HelenaHW:372756,000 population served2008
Hartsville_Trousdale County STPHW:373996,000 population served2012
SWEETWATER STPHW:375216,000 population served2012
Western La Joya WWTPHW:377026,000 population served2012
Allen Co American Bath WWTPHW:347965,999 population served2012
Tucumcari City ofHW:334025,989 population served2012
FOREST POTWHW:314765,986 population served2012
CENTRAL CITY STPHW:299485,978 population served2012
JERSEY SHORE STPHW:366125,974 population served2012
RICHLANDS WWTP and COLLECTION SYSTEMHW:383125,972 population served2012
Ware Dept of Public WorksHW:307545,970 population served2012
Spencer Dept of Public WorksHW:307945,970 population served2012
BROWNSVILLE AREA STPHW:368415,969 population served2012
INDEPENDENCE WWTPHW:287575,966 population served2012
CENTER TWP SA ELKHORN RUN STPHW:367005,965 population served2012
CRYSTAL SPRINGS POTWHW:314435,958 population served2012
DIAMONDHEAD WATER SEWER DISTRICTHW:316675,958 population served2012
JACKSON LAGOONHW:251825,950 population served2012
UMATILLA STPHW:361955,948 population served2012
PARIS SOUTH STPHW:275635,947 population served2012
Liberty V STPHW:336625,945 population served2012
PRATT WWTPHW:292765,944 population served2012
NEWCASTLE PWA WWTHW:358855,940 population served2012
CHICKASAW LAGOONHW:250035,938 population served2012
LITTLESTOWN BORO STPHW:365165,921 population served2012
WAYNESBORO POTWHW:316505,917 population served2012
WILMORE WWTPHW:298985,915 population served2012
SEAL HARBOR STPHW:304385,915 population served2012
UPPER ALLEN TWP GRANTHAM STPHW:365115,913 population served2012
Blytheville South WWTPHW:254275,907 population served2012
North Conway WWTFHW:331565,904 population served2012
LANCASTER STPHW:299955,900 population served2012
CARLINVILLE STPHW:279235,896 population served2012
EDENTON WWTPHW:341865,894 population served2012
Brookville WWTP and Sewer SystemHW:350045,884 population served2012
Canton V WWTPHW:338735,882 population served2012
MAYODAN WWTPHW:343725,881 population served2012
WEST BRANCH WWTPHW:308565,880 population served2012
Douglas County North Valley WWTPHW:331515,880 population served2012
BELDING STPHW:308895,877 population served2012
ST HELENA WWTFHW:258715,875 population served2012
VIROQUA STPHW:394935,862 population served2012
ATTALLA LAGOONHW:249855,861 population served2012
DENMARK CITY OFHW:371345,860 population served2008

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.