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World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · Wisconsin

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586 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

586 results

CompareNameNative sizeYear
CHILTON STPChilton0.92 MGD (million gallons per day)2022
DODGEVILLE STPDodgeville0.9 MGD (million gallons per day)2022
HOLMEN WWTPOnalaska0.863 MGD (million gallons per day)2022
DURAND WWTPDurand0.86 MGD (million gallons per day)2022
SAUK PRAIRIE SC - STPSauk City0.822 MGD (million gallons per day)2022
EAST TROY STPEast Troy0.81 MGD (million gallons per day)2022
Barron-Cameron WWTPBarron0.784 MGD (million gallons per day)2022
LADYSMITH WWTPLadysmith0.778 MGD (million gallons per day)2022
HAYWARD WWTPHayward0.77 MGD (million gallons per day)2022
CONSOLIDATED KOSHKONONG SD - STPEdgerton0.769 MGD (million gallons per day)2022
KEWASKUM WWTPKewaskum0.75 MGD (million gallons per day)2022
MEDFORD WWTPMedford0.75 MGD (million gallons per day)2022
LAKELAND SD #1 STP (Oneida)Minocqua0.75 MGD (million gallons per day)2022
EVANSVILLE WWTPEvansville0.742 MGD (million gallons per day)2022
LANCASTER STPLancaster0.74 MGD (million gallons per day)2022
BRILLION STPBrillion0.71 MGD (million gallons per day)2022
EDGERTON STPEdgerton0.7 MGD (million gallons per day)2022
JOHNSON CREEK WWTPJohnson Creek0.7 MGD (million gallons per day)2022
SISTER BAY WWTPSister Bay0.7 MGD (million gallons per day)2022
WEYAUWEGA STPWeyauwega0.7 MGD (million gallons per day)2022
Dane-Iowa WWTFMazomanie0.693 MGD (million gallons per day)2022
OCONTO FALLS STPOconto Falls0.68 MGD (million gallons per day)2022
LOMIRA WWTPLomira0.667 MGD (million gallons per day)2022
PARK FALLS WWTPPark Falls0.65 MGD (million gallons per day)2022
JUNEAU WWTPJuneau0.63 MGD (million gallons per day)2022
BELGIUM WWTPBelgium0.625 MGD (million gallons per day)2022
MILTON STPMilton0.625 MGD (million gallons per day)2022
FENNIMORE STPFennimore0.62 MGD (million gallons per day)2022
BLOOMER STPBloomer0.61 MGD (million gallons per day)2022
MOUNT HOREB STPMount Horeb0.61 MGD (million gallons per day)2022
OSCEOLA WWTPArcadia0.606 MGD (million gallons per day)2022
DENMARK WWTPDenmark0.6 MGD (million gallons per day)2022
FREDONIA WWTPFredonia0.6 MGD (million gallons per day)2022
STANLEY WWTPStanley0.6 MGD (million gallons per day)2022
TOMAHAWK WWTPIrma0.6 MGD (million gallons per day)2022
Northern Moraine Utility Com. WWTPGlenbeulah0.6 MGD (million gallons per day)2022
BRODHEAD STPBrodhead0.597 MGD (million gallons per day)2022
HORICON WWTPHoricon0.582 MGD (million gallons per day)2022
BLACK RIVER FALLS STPBlack River Falls0.58 MGD (million gallons per day)2022
GENOA CITY WWTPGenoa City0.58 MGD (million gallons per day)2022
SEYMOUR WWTPSeymour0.58 MGD (million gallons per day)2022
Cambridge-Oakland WW CommissionCambridge0.571 MGD (million gallons per day)2022
EAGLE RIVER STPEagle River0.57 MGD (million gallons per day)2022
MARSHALL STPMarshall0.57 MGD (million gallons per day)2022
MOSINEE WWTPMosinee0.55 MGD (million gallons per day)2022
TURTLE LAKE STPTurtle Lake0.546 MGD (million gallons per day)2022
LODI WWTPLodi0.542 MGD (million gallons per day)2022
PORT EDWARDS WWTPPort Edwards0.54 MGD (million gallons per day)2022
VIROQUA STPViroqua0.54 MGD (million gallons per day)2022
GREENWOOD STPGreenwood0.524 MGD (million gallons per day)2022
SPENCER WWTPSpencer0.52 MGD (million gallons per day)2022
PRESCOTT WWTPPrescott0.509 MGD (million gallons per day)2022
EDGAR WWTPEdgar0.5 MGD (million gallons per day)2022
HORTONVILLE STPHortonville0.5 MGD (million gallons per day)2022
WEST SALEM WWTPWest Salem0.5 MGD (million gallons per day)2022
WINNECONNE WWTPWinneconne0.495 MGD (million gallons per day)2022
NEILLSVILLE STPNeillsville0.488 MGD (million gallons per day)2022
PADDOCK LAKE STPSalem0.487 MGD (million gallons per day)2022
BLACK CREEK WWTPBlack Creek0.475 MGD (million gallons per day)2022
BOSCOBEL STPBoscobel0.474 MGD (million gallons per day)2022
CAMPBELLSPORT STPCampbellsport0.47 MGD (million gallons per day)2022
POYNETTE WWTPPoynette0.47 MGD (million gallons per day)2022
ROBERTS STPRoberts0.465 MGD (million gallons per day)2022
Bloomfield VillageLake Geneva0.46 MGD (million gallons per day)2022
NEKOOSA WWTPNekoosa0.46 MGD (million gallons per day)2022
NEW GLARUS STPNew Glarus0.46 MGD (million gallons per day)2022
WATERLOO WWTPWaterloo0.46 MGD (million gallons per day)2022
CROSS PLAINS STPCross Plains0.45 MGD (million gallons per day)2022
RANDOM LAKE STPRandom Lake0.45 MGD (million gallons per day)2022
HARMONY GROVE-OKEE WWTPLodi0.446 MGD (million gallons per day)2022
OOSTBURG STPOostburg0.44 MGD (million gallons per day)2022
ADAMS WWTPFriendship0.436 MGD (million gallons per day)2022
OWEN WWTPOwen0.426 MGD (million gallons per day)2022
FREEDOM SD WWTPFreedom0.402 MGD (million gallons per day)2022
Pulaski WWTPPulaski0.4 MGD (million gallons per day)2022
AMERY STPAmery0.4 MGD (million gallons per day)2022
CEDAR GROVE STPCedar Grove0.4 MGD (million gallons per day)2022
COLBY WWTPColby0.4 MGD (million gallons per day)2022
CUMBERLAND WWTPCumberland0.4 MGD (million gallons per day)2022
Luxemburg - CSLuxemburg0.4 MGD (million gallons per day)2022
EAGLE LAKE UD #1 - STPKansasville0.4 MGD (million gallons per day)2022
ORFORDVILLE STPOrfordville0.398 MGD (million gallons per day)2022
ST. CROIX FALLS STPSaint Croix Falls0.398 MGD (million gallons per day)2022
CASSVILLE STPCassville0.396 MGD (million gallons per day)2022
CORNELL STPCornell0.395 MGD (million gallons per day)2022
DEERFIELD STPDeerfield0.393 MGD (million gallons per day)2022
BALDWIN STPBaldwin0.392 MGD (million gallons per day)2022
NIAGARA WWTPNiagara0.39 MGD (million gallons per day)2022
HOLLAND SD #1 WWTPKaukauna0.39 MGD (million gallons per day)2022
MONDOVI WWTPMondovi0.385 MGD (million gallons per day)2022
NEW LISBON STPNew Lisbon0.381 MGD (million gallons per day)2022
WASHBURN WWTPWashburn0.38 MGD (million gallons per day)2022
CLINTON STPClinton0.378 MGD (million gallons per day)2022
SPOONER WWTPSpooner0.375 MGD (million gallons per day)2022
PHILLIPS STPPhillips0.374 MGD (million gallons per day)2022
CHETEK STPChetek0.365 MGD (million gallons per day)2022
LUCK STPLuck0.364 MGD (million gallons per day)2022
Maine, Village ofWausau0.36 MGD (million gallons per day)2022
MARKESAN WWTPMarkesan0.36 MGD (million gallons per day)2022
ELLSWORTH WWTPEllsworth0.358 MGD (million gallons per day)2022

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.