Grant County, Wisconsin — public water systems

90 active public water systems serve Grant County, reporting 41.7K people served.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

Population served

41.7K

Community systems

Groundwater share

100%

Water systems in Grant County

Active public water systems in Grant County, Wisconsin
#	Water system	County	Population served	Type	Source
1	Platteville Waterworks	Grant	12,268	Community	Groundwater
2	Lancaster Waterworks	Grant	3,907	Community	Groundwater
3	Boscobel Waterworks	Grant	3,237	Community	Groundwater
4	Fennimore Waterworks	Grant	2,507	Community	Groundwater
5	Cuba City Waterworks	Grant	2,141	Community	Groundwater
6	Muscoda Waterworks	Grant	1,453	Community	Groundwater
7	Hazel Green Waterworks	Grant	1,193	Community	Groundwater
8	Dickeyville Waterworks	Grant	1,069	Community	Groundwater
9	Wi Dot Rest Area 106 Jamestown	Grant	880	Transient non-community	Groundwater
10	Cassville Waterworks	Grant	777	Community	Groundwater
11	Montfort Waterworks	Grant	718	Community	Groundwater
12	Potosi Waterworks	Grant	718	Community	Groundwater
13	Bloomington Waterworks	Grant	682	Community	Groundwater
14	Livingston Waterworks	Grant	664	Community	Groundwater
15	Wi Dnr Wyalusing Central Pump House	Grant	600	Transient non-community	Groundwater
16	Kieler Sd No 1	Grant	560	Community	Groundwater
17	Blue River Waterworks	Grant	424	Community	Groundwater
18	Boulder Creek Campground	Grant	368	Transient non-community	Groundwater
19	Tennyson Waterworks	Grant	367	Community	Groundwater
20	Bagley Waterworks	Grant	353	Community	Groundwater
21	Wi Historical Stonefield Barn	Grant	303	Transient non-community	Groundwater
22	Wi Historical Stonefield Ag Museum	Grant	300	Transient non-community	Groundwater
23	Wi Dnr Wyalusing Visitors Station	Grant	254	Transient non-community	Groundwater
24	River of Lakes Riverfront Campground & Resort	Grant	250	Transient non-community	Groundwater
25	Platteville Golf & Cntry Clb	Grant	215	Transient non-community	Groundwater
26	Sinsinawa Dominicans Inc.	Grant	213	Community	Groundwater
27	Hickory Grove Country Club	Grant	210	Transient non-community	Groundwater
28	Crossroads Supper Club	Grant	208	Transient non-community	Groundwater
29	Mount Hope Waterworks	Grant	181	Community	Groundwater
30	Boscobel Bowling & Banquet	Grant	162	Transient non-community	Groundwater
31	Patch Grove Waterworks	Grant	160	Community	Groundwater
32	Birchwood Golf Course Clubhouse	Grant	160	Transient non-community	Groundwater
33	Country Heights Supper Club	Grant	153	Transient non-community	Groundwater
34	Whitetail Bluff Camp and Resort Expansion	Grant	150	Transient non-community	Groundwater
35	St Marys Catholic Church	Grant	150	Transient non-community	Groundwater
36	Stitzer Sanitary Dist 1	Grant	150	Community	Groundwater
37	Wisconsin Badger Camp	Grant	140	Transient non-community	Groundwater
38	Three Mile House	Grant	135	Transient non-community	Groundwater
39	Village Bar	Grant	129	Transient non-community	Groundwater
40	Wi Dnr Nelson Dewey Walnut Grove Group Camp	Grant	125	Transient non-community	Groundwater
41	Coconut Cove Resort	Grant	108	Transient non-community	Groundwater
42	I Dont Care Pub & Grub	Grant	106	Transient non-community	Groundwater
43	Gulers Corners	Grant	106	Transient non-community	Groundwater
44	Whitetail Bluff Camp and Resort	Grant	103	Transient non-community	Groundwater
45	Calvary Baptist Ch	Grant	101	Transient non-community	Groundwater
46	Motor Boatn Bar and Grill	Grant	101	Transient non-community	Groundwater
47	Grant River Recreation Area	Grant	100	Transient non-community	Groundwater
48	Wi Dnr Nelson Dewey Maple Grove Office	Grant	100	Transient non-community	Groundwater
49	Maryville Sd 2	Grant	100	Community	Groundwater
50	St Joseph Catholic School	Grant	100	Non-transient non-community	Groundwater