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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
PRAGUE WWTHW:358742,138 population served2012
COULEE DAM S_T FACHW:386982,138 population served2012
GREEN LAKE SD 1 STPHW:395792,137 population served2012
CHELSEA WWTHW:359712,136 population served2012
BRITT WWTPHW:285352,133 population served2012
Bono WWTPHW:255252,131 population served2012
WESTMORLAND WWTFHW:261972,131 population served2012
Hurlock WWTP and Collection SystemHW:305832,131 population served2012
PACIFIC CITY STPHW:361642,131 population served2012
Utica WWTP and Sewer SystemHW:347892,130 population served2012
Castle Rock WWTPHW:385652,130 population served2012
HUNTINGTONHW:381542,129 population served2012
WASHBURN WWTPHW:394962,129 population served2012
LA PORTE CITY WWTPHW:287952,128 population served2012
WARSAW WWTPHW:324432,127 population served2012
OAK GROVE PONDHW:303412,126 population served2012
SPRINGVILLE LAGOONHW:251002,125 population served2012
Stockbridge Dept of Public WorksHW:307812,125 population served2012
BRUCE POTWHW:314082,125 population served2012
CHAPMANVILLE WWTPHW:389012,125 population served2012
SALISBURY WPCFHW:265932,124 population served2012
WAPELLO STLHW:291102,124 population served2012
SISTERS WW TREATMENT IMPROVEMENTSHW:361892,124 population served2012
LINDEN HCR LAGOONHW:251882,123 population served2012
ST CROIX FALLS STPHW:394352,122 population served2012
GRANBY WWTPHW:320042,121 population served2012
BARGERSVILLE WWTPHW:280002,120 population served2012
Alto Water and Sanitation DistrictHW:335222,120 population served2012
ELKHART WWTPHW:293282,119 population served2012
HARTFORD LAGOONHW:250412,118 population served2012
North PoleHW:252672,117 population served2012
Edgerton WWTP and Sewer SystemHW:350892,117 population served2012
SPARKS WPCPHW:272922,116 population served2012
WESTVILLE WWTPHW:283122,116 population served2012
LYMAN LAGOONHW:397182,115 population served2012
Wrightsville WWTPHW:257192,114 population served2012
RICHLAND WWTPHW:317812,113 population served2012
SIGOURNEY EAST WWTPHW:290412,111 population served2012
NARROWS STPHW:383262,111 population served2012
TREMONT STPHW:276642,109 population served2012
HARRISON WWTFHW:308602,108 population served2012
MOUNTAIN LAKE PONDSHW:312502,108 population served2012
CREWE WWTPHW:383812,108 population served2012
TAYLORSVILLE WWTPHW:341242,106 population served2012
Portsmouth Sciotoville WWTP and Sewer SystemHW:353702,106 population served2012
Buckskin Mountain SD WWTFHW:253932,105 population served2012
HAWLEY WWTFHW:312292,104 population served2012
Bullitt Co Sanitation District WillabrookHW:298492,101 population served2012
HUTTONSVILLE PSD WWTPHW:390032,101 population served2012
Fountain_Holman Correctional FacilityHW:252492,100 population served2012
ARBUCKLE WWTFHW:260992,100 population served2012
Lower Moosa Canyon WRFHW:262562,100 population served2012
NEW ATHENS STPHW:276402,100 population served2012
TIFFIN WWTPHW:290812,100 population served2012
ELKHORN CITY STPHW:299602,100 population served2012
BARAGA STPHW:311352,100 population served2012
HOUSTON BRUSHY CREEK WWTPHW:321912,100 population served2012
GOSPER CO JOHNSON LAKEHW:327942,100 population served2012
SUPERIOR WWTPHW:330462,100 population served2012
Warrensburg T STP and On SitesHW:338162,100 population served2012
Geauga Co Opalacka WWTPHW:351252,100 population served2012
Mahoning Co Craig Beach WWTPHW:352492,100 population served2012
LEHIGH TWP DANIELSVILLE STPHW:363812,100 population served2012
GALETON BORO AUTHHW:368632,100 population served2012
PACOLET MILLS WWTPHW:371182,100 population served2008
PAGELAND NW WWTFHW:371252,100 population served2008
WEBB CREEK UD STPHW:375612,100 population served2012
DeKalb South WWTPHW:378882,100 population served2012
Quitman WWTPHW:379392,100 population served2012
Mason WWTPHW:381082,100 population served2012
OSCEOLA MILLS BORO STPHW:369512,099 population served2012
HARPERS FERRY BOLIVAR PSD WWTPHW:388792,098 population served2012
PARDEEVILLE WWTPHW:393802,098 population served2012
MALAD CITY STPHW:274952,095 population served2012
BELLEVILLE STPHW:391012,095 population served2012
SUMNER POTWHW:316232,094 population served2012
GREENWOOD STPHW:301372,092 population served2012
SIMMESPORT STPHW:301942,092 population served2012
DCNR MORAINE STATE PARK STPHW:367552,092 population served2012
OVERTON CollectionHW:331112,091 population served2012
KIRKLAND VILLAGE OFHW:275822,090 population served2012
DCRUA Lake Forest 1 WWTFHW:314532,090 population served2012
SAN YSIDRO WWTPHW:333982,090 population served2012
MCCANDLESS TWP AandB STPHW:367022,090 population served2012
YOUGH SAN AUTH SSHW:368072,090 population served2012
NEW HAVEN WWTPHW:318742,089 population served2012
CENTERVILLE RICHEYVILLE STPHW:367872,088 population served2012
LYONS WPCP 1 EASTHW:272462,087 population served2012
OGDEN WWTPHW:293852,087 population served2012
KEOSAUQUA WWTPHW:287762,086 population served2012
LATHROP WWTPHW:321382,086 population served2012
RANDOM LAKE STPHW:394112,086 population served2012
COURTLAND STPHW:383632,085 population served2012
Maybrook V WWTPHW:336142,084 population served2012
ORLEANS WWTPHW:283342,083 population served2012
Lake City WWTPHW:256002,082 population served2012
BETSIE LAKE UNTILIES AUTHHW:311702,081 population served2012
FREDONIA WWTPHW:392262,081 population served2012
North Madison Co SD Regional WWTPHW:300982,080 population served2012
GERVAIS STPHW:360422,080 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.