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Juneau County, Wisconsin — public water systems

At a glance

146 active public water systems are filed under Juneau County, Wisconsin in EPA's SDWIS records, together reporting 26,525 people served. The largest is Mauston Waterworks, which reports serving 4,456 people. 15 are community water systems serving people where they live; the other 131 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

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

Active systems

146

Population served

26.5K

Community systems

15

Groundwater share

100%

How does Juneau County compare with other Wisconsin counties?

Juneau County has the 35th-most active public water systems among the 90 counties listed for active Wisconsin systems in EPA records; among the 74 with 3 or more systems, the median has 140. Its systems report 26,525 people served in total, the 38th-largest county figure in the state and 0.5% of the statewide total. The average system here reports serving 182 people, about 61% below the Wisconsin average of 469. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Juneau County's drinking water come from?

By primary water source, Juneau County's active systems draw on groundwater (146, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 99% and 0.6% across Wisconsin. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Mauston Waterworks, draws primarily on groundwater.

What kinds of water systems operate in Juneau County?

Juneau County's active systems break down as 15 community systems (10%), 3 non-transient non-community systems (2.1%) and 128 transient non-community systems (88%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (73%), local government (16%), state government (8.9%) and federal government (1.4%).

The 50 largest water systems in Juneau County

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Active public water systems in Juneau County, Wisconsin
#Water systemCountyPopulation servedTypeSource
1Mauston WaterworksJuneau4,456CommunityGroundwater
2Woodside Sports ComplexJuneau3,008Transient non-communityGroundwater
3New Lisbon WaterworksJuneau2,526CommunityGroundwater
4Wi Dot Rest Area 10 KildareJuneau2,000Transient non-communityGroundwater
5Wi Dot Rest Area 9 LemonweirJuneau2,000Transient non-communityGroundwater
6Elroy WaterworksJuneau1,333CommunityGroundwater
7Necedah WaterworksJuneau844CommunityGroundwater
8Wonewoc WaterworksJuneau758CommunityGroundwater
9Camp Douglas WaterworksJuneau640CommunityGroundwater
10Wi Dot Wayside 2 Orange Camp DouglasJuneau500Transient non-communityGroundwater
11Lyndon Station WaterworksJuneau474CommunityGroundwater
12Wi Air National Guard Volk FieldJuneau400CommunityGroundwater
13Shipwreck Bay Bar and ResortJuneau300Transient non-communityGroundwater
14Union Center WaterworksJuneau225CommunityGroundwater
15Kountry Aire Est MHP IiiJuneau210CommunityGroundwater
16Shangri-La Campground 1Juneau200Transient non-communityGroundwater
17Shangri-La Campground 2Juneau200Transient non-communityGroundwater
18Hustler WaterworksJuneau170CommunityGroundwater
19Woodside Ranch LLC - WestJuneau150Transient non-communityGroundwater
20Woodside Ranch LLC - EastJuneau150Transient non-communityGroundwater
21Howling Hills CmpgdJuneau103Transient non-communityGroundwater
22Holy Cow Bar & GrillJuneau103Transient non-communityGroundwater
23Arrowhead CampgroundJuneau100Transient non-communityGroundwater
24Wells Lakeside Cottages South EndJuneau100Transient non-communityGroundwater
25Wells Lakeside Cottages North EndJuneau100Transient non-communityGroundwater
26Castle Rock Lake CmpgrdJuneau100Transient non-communityGroundwater
27In the Pines Cmpgd Well 3Juneau100Transient non-communityGroundwater
28Shangri-La CmpgdJuneau100Transient non-communityGroundwater
29Stand Rock Consessions Boat ToursJuneau100Transient non-communityGroundwater
30Wi Dnr Buckhorn Group CampJuneau100Transient non-communityGroundwater
31Woodbine InnJuneau100Transient non-communityGroundwater
32Winding River CmpgdJuneau100Transient non-communityGroundwater
33Camp Upham CampgroundJuneau100Transient non-communityGroundwater
34Edge O Dells Resort - CampgroundJuneau100Transient non-communityGroundwater
35Edge O Dells Resort - Cmpgd Expansion & PoolJuneau100Transient non-communityGroundwater
36Wi Dnr Buckhorn ShowersJuneau100Transient non-communityGroundwater
37Wi Dnr Buckhorn BeachJuneau100Transient non-communityGroundwater
38Castle Rock Park 8 High CapJuneau100Transient non-communityGroundwater
39Castle Rock Park BathhouseJuneau100Transient non-communityGroundwater
40Wi Dnr Buckhorn S PicJuneau100Transient non-communityGroundwater
41Castle Rock Park 5Juneau100Transient non-communityGroundwater
42Castle Rock Park 6Juneau100Transient non-communityGroundwater
43Kountry Aire Est MHP IJuneau90CommunityGroundwater
44Yukon Trails Cmpgd-West Side WellJuneau85Transient non-communityGroundwater
45River Bay Marina 2 Pool AreaJuneau75Transient non-communityGroundwater
46Wi Dnr Dells of the Wi River - OverlookJuneau75Transient non-communityGroundwater
47River Bay Marina 1Juneau75Transient non-communityGroundwater
48Wilderness InnJuneau75Transient non-communityGroundwater
49In the Pines Low Cap WellJuneau70Transient non-communityGroundwater
50In the Pines High Cap WellJuneau64Transient non-communityGroundwater

All other water systems in Juneau County (96)

The remaining active systems filed under Juneau County, largest first, with the population each reports serving.

Juneau County water systems: frequently asked questions

How many public water systems are in Juneau County, Wisconsin?

EPA's SDWIS records file 146 active public water systems under Juneau County, Wisconsin: 15 community systems (10%), 3 non-transient non-community systems (2.1%) and 128 transient non-community systems (88%).

Who supplies drinking water in Juneau County, WI?

The largest community water systems filed under Juneau County are Mauston Waterworks (4,456 people served), New Lisbon Waterworks (2,526 people served) and Elroy Waterworks (1,333 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Juneau County's drinking water come from groundwater or surface water?

Of the 146 active public water systems in Juneau County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Mauston Waterworks, uses groundwater.

Where can I find a water quality report for Juneau County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 15 community systems are filed under Juneau County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Juneau County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Wisconsin water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Juneau County, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/juneau (data as of October 1, 2026).