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EWG's Tap Water Database — 2019 UPDATE

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Utility name City People served
Allouez Waterworks Green Bay Population served: 13,932
Appleton Waterworks Menasha Population served: 72,000
Ashwaubenon Waterworks Green Bay Population served: 17,730
Baraboo Waterworks Baraboo Population served: 12,048
Beaver Dam Water Utility Beaver Dam Population served: 16,200
Bellevue Waterworks Green Bay Population served: 15,365
Brookfield Water Utility Brookfield Population served: 29,070
Brown Deer Waterworks Brown Deer Population served: 12,741
Cedarburg L & W Commission Cedarburg Population served: 11,900
Chippewa Falls Waterworks Chippewa Falls Population served: 13,375
City of Beloit Beloit Population served: 37,110
Cudahy Waterworks Cudahy Population served: 18,659
Darboy Sanitary District 1 Appleton Population served: 12,000
De Pere Water Department De Pere Population served: 23,920
Eau Claire Waterworks Eau Claire Population served: 66,060
Fitchburg Utility District 1 Fitchburg Population served: 15,000
Fond Du Lac Waterworks Fond Du Lac Population served: 42,000
Fort Atkinson Waterworks Fort Atkinson Population served: 12,125
Franklin Water Utility Franklin Population served: 22,500
Germantown Water Utility Germantown Population served: 20,027
Glendale Waterworks Glendale Population served: 12,883
Grafton Waterworks Grafton Population served: 11,745
Grand Chute Tn San District 1 Grand Chute Population served: 21,583
Green Bay Waterworks Green Bay Population served: 104,057
Greendale Waterworks Greendale Population served: 14,046
Hartford Waterworks Hartford Population served: 15,384
Howard Waterworks Green Bay Population served: 18,900
Hudson Waterworks Hudson Population served: 17,100
Janesville Water Utility Janesville Population served: 62,720
Kaukauna Utilities Kaukauna Population served: 13,430
Kenosha Water Utility Kenosha Population served: 99,218
La Crosse Waterworks La Crosse Population served: 53,000
Little Chute Waterworks Little Chute Population served: 11,040
Madison Water Utility Madison Population served: 235,000
Manitowoc Waterworks Manitowoc Population served: 34,500
Marinette Waterworks Marinette Population served: 10,968
Marshfield Utilities Marshfield Population served: 18,708
Menasha Elec & Water Util Menasha Population served: 14,728
Menomonee Falls WW - Surface Water Menomonee Falls Population served: 23,867
Menomonie Waterworks Menomonie Population served: 15,950
Mequon Water Utility Mequon Population served: 11,152
Middleton Waterworks Middleton Population served: 17,903
Milwaukee Waterworks Milwaukee Population served: 647,290
Monroe Waterworks Monroe Population served: 10,780
Neenah Waterworks Neenah Population served: 25,892
New Berlin Water Utility New Berlin Population served: 27,899
Oak Creek Waterworks Oak Creek Population served: 32,104
Oconomowoc Waterworks Oconomowoc Population served: 15,805
Onalaska Waterworks Onalaska Population served: 18,000
Oshkosh Waterworks Oshkosh Population served: 63,000
Platteville Waterworks Platteville Population served: 12,268
Pleasant Prairie Water Utility Pleasant Prairie Population served: 10,754
Plover Waterworks Plover Population served: 12,420
Port Washington Waterworks Port Washington Population served: 11,762
Portage Waterworks Portage Population served: 10,300
Racine Waterworks Racine Population served: 105,100
River Falls Waterworks River Falls Population served: 15,229
Sheboygan Water Utilities Sheboygan Population served: 49,288
Shorewood Waterworks Shorewood Population served: 13,189
South Milwaukee Waterworks South Milwaukee Population served: 21,340
Stevens Point Waterworks Stevens Point Population served: 24,551
Stoughton Waterworks Stoughton Population served: 12,698
Sun Prairie Utilities Sun Prairie Population served: 32,613
Superior Water Light & Power Company Superior Population served: 29,571
Sussex Village Hall & Water Utility Sussex Population served: 10,573
Two Rivers Waterworks Two Rivers Population served: 11,232
Verona Waterworks Verona Population served: 10,619
Village of Caledonia Water Utility Caledonia Population served: 21,819
Watertown Waterworks Watertown Population served: 23,127
Waukesha Water Utility Waukesha Population served: 70,718
Waunakee Waterworks Waunakee Population served: 13,322
Waupun Utilities Waupun Population served: 11,340
Wausau Waterworks Wausau Population served: 39,106
Wauwatosa Waterworks Wauwatosa Population served: 49,064
West Allis Waterworks West Allis Population served: 63,240
West Bend Waterworks West Bend Population served: 31,500
Weston Municipal Utilities Weston Population served: 15,045
Whitefish Bay Waterworks Whitefish Bay Population served: 14,272
Whitewater Waterworks Whitewater Population served: 14,000
Wisconsin Rapids Water Works & Lighting Comm. Wisconsin Rapids Population served: 20,000