Wisconsin utilities with soft water.

Up to 60 mg/L (3.5 grains per gallon). 76 utilities serving 31,231 people as they report it, largest first.

All 76, by people served

Wisconsin utilities with soft water, 1 to 76
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Ashland Water Utility	Ashland	8,000	53	3.1
Bloomer Waterworks	Bloomer	3,680	53	3.1
Brockway Sanitary Dist 1	Black River Falls	2,692	33	1.9
Cornell Waterworks	Cornell	1,390	58	3.4
Colfax Waterworks	Colfax	1,102	21	1.2
Strum Waterworks	Strum	1,100	54	3.2
Hustisford Waterworks	Hustisford	1,063	7.3	0.4
Biron Water Utility	Wisconsin Rapids	879	31	1.8
Camp Douglas Waterworks	Camp Douglas	640	34	2
Eleva Waterworks	Eleva	635	51	3
Delafield Square	Delafield	587	2.4	0.1
Warrens Waterworks	Warrens	540	9.8	0.6
Merrillan Waterworks	Merrillan	531	28	1.6
Alma Center Waterworks	Alma Center	487	36	2.1
Lyndon Station Waterworks	Lyndon Station	474	31	1.8
Fairchild Waterworks	Fairchild	451	32	1.8
North Hills MHP	Beaver Dam	420	1.5	0.1
Villa Diann MHP	Eau Claire	420	53	3.1
Pigeon Falls Waterworks	Pigeon Falls	409	35	2
WI Air National Guard Volk Field	Camp Douglas	400	20	1.2
Delavan Club Condos	Delavan	395	1.1	0.1
Northernaire Sanitary District	Three Lakes	315	10	0.6
Evergreen Villa Mobile Homes	Hull	250	41	2.4
Fort McCoy South Post	Fort McCoy	250	15	0.9
Genesee Lake School South	Oconomowoc	230	1.4	0.1
Middle River Health and Rehab Center	South Range	200	13	0.8
Whitnall Garden Apartments	Hales Corners	200	1.5	0.1
Priory the	Eau Claire	185	42	2.5
Black River Correctional Center	Black River Falls	163	20	1.2
Cortland Acres	Sparta	145	4.3	0.3
Oakton Beach	Pewaukee	144	0.5	0
Prairie Apts 3 & 4	Salem	125	0.5	0
Gordon Correctional Center	Gordon	124	39	2.3
Hiawatha Mh Estates Clbhse	Arbor Vitae	124	47	2.7
Deer Trail Village	Mosinee	120	21	1.2
Cozy MHP LLC Front	Eau Claire	111	41	2.4
Harmony Hills Mh Village	Rhinelander	100	38	2.2
Pirco MHP	Wisconsin Rapids	97	54	3.2
Countryside Estates Mhc	Fall Creek	96	36	2.1
Rawhide Youth Homes	New London	92	0.8	0
Country Aire Apartments 2	Hartland	90	1.6	0.1
Riverview Park	Buffalo City	90	0.8	0
Town Hall Apts	Delavan	90	0.9	0.1
Red Cedar Valley Estates MHP	Cameron	80	41	2.4
Apartments of Stoneridge	Delafield	75	0.3	0
Dells Club Condo Assoc 2	Wisconsin Dells	75	6.6	0.4
Dells Club Condo Assoc 3	Wisconsin Dells	75	27	1.6
Pine Grove Villa	Bancroft	75	6.1	0.4
Equinox Rei LLC Dellwood Estates	Reedsburg	70	13	0.7
Knollcrest	Delafield	66	0.7	0
Duncan Prairie Mhc	Bloomer	64	42	2.5
Berghs Mobile Home Park	Mondovi	60	55	3.2
River Villa Mobile Home Court	Menomonie	60	1	0.1
Bonnie Vale Park 2	Eau Claire	51	25	1.5
Silvercrest Apartments	Silver Lake	51	0.6	0
Carriage Hills Condominiums	Elm Grove	50	7.9	0.5
Dell Creek Estates	Reedsburg	50	13	0.8
Hills of Wales Apts	Wales	50	1.5	0.1
Edgewood Country Estates	Mosinee	49	45	2.6
Meadowview Village Apts	Twin Lakes	48	3	0.2
North Lake Village	Grand Chute	44	1	0.1
Chiara Convent	Manitowoc	40	1.6	0.1
Delafield Woods 411	Delafield	40	0.6	0
Delafield Woods 828	Delafield	40	0.6	0
Mauston Green Acres	Mauston	40	35	2
Hidden Acres Mobile Pk 2	Arbor Vitae	39	42	2.5
Pearces Mobile Home Estates	Mauston	37	24	1.4
Cozy MHP LLC Back	Eau Claire	35	27	1.6
Hidden Acres Mobile Pk 1	Arbor Vitae	32	42	2.5
Lincoln Crest Apartments	Twin Lakes	32	11	0.6
337 - 9 Holy Hill Apartments LLC	Twin Lakes	30	8.1	0.5
Lake View Apts	Silver Lake	30	3	0.2
Hidden Acres Mobile Pk 3	Arbor Vitae	29	22	1.3
Village Plaza Apts	Paddock Lake	28	2.6	0.2
Kountry Aire Est MHP II	Mauston	25	19	1.1
River Garden Apts	Thiensville	25	0.8	0

Source: Wisconsin Department of Natural Resources, Drinking Water Program, 940 utilities, results from Feb. 4, 2015 to Sept. 24, 2026, read Oct. 10, 2026. Each sampling point is taken at its median; a figure is typical where every point falls in one band.

Bands are the U.S. Geological Survey’s, at 17.1 mg/L to the grain. People served is what each utility reports; where one sells water to another, the same people can be counted twice. How hardness is measured here.

All 76, by people served

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