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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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593 inventory records · HydroWASTE v1.0 / United States

Data years: 2012. The inventory date does not establish current operation.

593 results

CompareNameNative sizeYear
MILWAUKEE MSD COMBINEDHW:393331,114,952 population served2012
MADISON MSD STPHW:39305358,612 population served2012
Green Bay MSD CombinedHW:39565228,964 population served2012
RACINE STPHW:39408137,701 population served2012
KENOSHA WWTPHW:39278124,215 population served2012
La Crosse WWTPHW:3928581,491 population served2012
OSHKOSH WWTPHW:3937374,077 population served2012
EAU CLAIRE WWTPHW:3919773,694 population served2012
APPLETON WWTPHW:3907673,598 population served2012
SHEBOYGAN REGIONAL WWTPHW:3944171,886 population served2012
WAUKESHA STPHW:3949870,867 population served2012
JANESVILLE WWTPHW:3926963,479 population served2012
FOND DU LAC REGIONAL WWTPHW:3922162,965 population served2012
BROOKFIELD Fox River WPCCHW:3912952,868 population served2012
NEENAH MENASHA SC WWTPHW:3932452,258 population served2012
Heart of the Valley MSDHW:3924946,388 population served2012
GRAND CHUTE MENASHA WWTPHW:3954943,427 population served2012
WAUSAU WWTPHW:3950341,388 population served2012
WIS DELLS LAKE DELTON STPHW:3952337,828 population served2012
WALWORTH COUNTY MSD STPHW:3918437,307 population served2012
BELOIT WWTPHW:3910336,913 population served2012
MANITOWOC WWTPHW:3930834,724 population served2012
RIB MOUNTAIN MSD STPHW:3959033,687 population served2012
WEST BEND WWTPHW:3950630,636 population served2012
SUN PRAIRIE STPHW:3946929,849 population served2012
SUPERIOR WWTPHW:3947028,273 population served2012
STEVENS POINT STPHW:3946227,202 population served2012
WISCONSIN RAPIDS STPHW:3952425,553 population served2012
WATERTOWN STPHW:3949723,895 population served2012
WHITEWATER STPHW:3951722,110 population served2012
OCONOMOWOC WWTPHW:3936322,109 population served2012
SOUTH MILWAUKEE STPHW:3945222,033 population served2012
MARSHFIELD WWTPHW:3931619,400 population served2012
Delafield Hartland WPCCHW:3910719,334 population served2012
CHIPPEWA FALLS WWTPHW:3915417,738 population served2012
WOLF WWTPHW:3962517,523 population served2012
RIVER FALLS WWTPHW:3942617,099 population served2012
HUDSON WWTPHW:3926316,649 population served2012
BEAVER DAM WWTPHW:3909916,194 population served2012
MENOMONIE WWTPHW:3932515,952 population served2012
TWO RIVERS WWTPHW:3948515,045 population served2012
SUSSEX REGIONAL WWTPHW:3947314,856 population served2012
BURLINGTON WWTPHW:3913514,536 population served2012
Salem Utility District STPHW:3955614,260 population served2012
PLATTEVILLE WWTPHW:3939014,182 population served2012
HARTFORD WWTPHW:3924412,857 population served2012
STOUGHTON STPHW:3946412,817 population served2012
BARABOO STPHW:3909312,444 population served2012
FORT ATKINSON STPHW:3956812,151 population served2012
NEW RICHMOND STPHW:3935712,121 population served2012
WESTERN RACINE CO SD STPHW:3955311,790 population served2012
MARINETTE WWTPHW:3931211,749 population served2012
PLOVER WWTPHW:3939111,651 population served2012
GRAFTON WWTPHW:3923511,481 population served2012
CEDARBURG STPHW:3914711,436 population served2012
WAUPACA WWTPHW:3950011,368 population served2012
PORT WASHINGTON WWTPHW:3939811,272 population served2012
MONROE WWTPHW:3933711,015 population served2012
WAUPUN WWTPHW:3950110,718 population served2012
PORTAGE WWTPHW:3939510,337 population served2012
STURGEON BAY STPHW:3946710,005 population served2012
NORWAY TOWN SD 1 STPHW:395519,800 population served2012
RICE LAKE STPHW:394209,795 population served2012
MERRILL STPHW:393269,614 population served2012
EAST TROY STPHW:391969,407 population served2012
OREGON STPHW:393709,382 population served2012
ASHLAND STPHW:390819,229 population served2012
TOMAH WWTPHW:394799,169 population served2012
SPARTA WWTPHW:394549,032 population served2012
LAKE GENEVA WWTPHW:392889,031 population served2012
PLYMOUTH WWTPHW:393938,626 population served2012
RIPON WWTPHW:394258,612 population served2012
REEDSBURG STPHW:394148,529 population served2012
ANTIGO WWTPHW:390758,234 population served2012
RICHLAND CENTER WWTPHW:394218,136 population served2012
RHINELANDER STPHW:394187,908 population served2012
JEFFERSON STPHW:392707,569 population served2012
FONTANA WALWORTH WPCC WWTPHW:394957,471 population served2012
PRAIRIE DU CHIEN WWTPHW:394027,433 population served2012
SAUK PRAIRIE SC STPHW:394037,413 population served2012
HOLMEN WWTPHW:392597,297 population served2012
BELOIT Town of STPHW:396247,226 population served2012
JACKSON WWTPHW:392687,170 population served2012
NEW LONDON WWTPHW:393567,161 population served2012
MOUNT HOREB STPHW:393447,083 population served2012
LAKE MILLS WWTPHW:392907,033 population served2012
TWIN LAKES WWTPHW:394846,942 population served2012
MUKWONAGO STPHW:393456,570 population served2012
CONSOLIDATED KOSHKONONG SD STPHW:395336,292 population served2012
OCONTO WWTPHW:393646,063 population served2012
VIROQUA STPHW:394935,862 population served2012
HARMONY GROVE OKEE WWTPHW:395675,781 population served2012
MILTON STPHW:393325,412 population served2012
BLACK RIVER FALLS STPHW:391105,378 population served2012
BERLIN STPHW:391055,285 population served2012
EDGERTON STPHW:392005,273 population served2012
MAYVILLE STPHW:393205,221 population served2012
WEST SALEM WWTPHW:395095,076 population served2012
Barron Cameron WWTPHW:390955,053 population served2012
UNION GROVE WWTPHW:394874,916 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.