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Ashland County, Wisconsin — public water systems

At a glance

82 active public water systems are filed under Ashland County, Wisconsin in EPA's SDWIS records, together reporting 12,416 people served. The largest is Ashland Water Utility, which reports serving 8,000 people. 5 are community water systems serving people where they live; the other 77 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

82

Population served

12.4K

Community systems

5

Groundwater share

98.8%

How does Ashland County compare with other Wisconsin counties?

Ashland County has the 54th-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 12,416 people served in total, the 58th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 151 people, well 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 Ashland County's drinking water come from?

By primary water source, Ashland County's active systems draw on groundwater (81, 99%) and surface water (1, 1.2%). Overall, 99% rely mainly on groundwater (including purchased groundwater) and 1.2% 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, Ashland Water Utility, draws primarily on surface water.

What kinds of water systems operate in Ashland County?

Ashland County's active systems break down as 5 community systems (6.1%), 2 non-transient non-community systems (2.4%) and 75 transient non-community systems (91%). 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 (68%), local government (24%), state government (6.1%) and federal government (1.2%).

The 50 largest water systems in Ashland County

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Active public water systems in Ashland County, Wisconsin
#Water systemCountyPopulation servedTypeSource
1Ashland Water UtilityAshland8,000CommunitySurface water
2Glidden Sanitary DistrictAshland750CommunityGroundwater
3Mellen Water UtilityAshland731CommunityGroundwater
4Butternut WaterworksAshland283CommunityGroundwater
5Marengo Valley SchoolAshland220Non-transient non-communityGroundwater
6Hartzell Subdivision - Abbey LaneAshland115Transient non-communityGroundwater
7Bobbers on the LakeAshland100Transient non-communityGroundwater
8Beach ClubAshland100Transient non-communityGroundwater
9Madeline Island Music Camp Center WellAshland70Transient non-communityGroundwater
10Aspen RidgeAshland50CommunityGroundwater
11Dollar General Inc.Ashland50Transient non-communityGroundwater
12Big Bay Island Park Parking Area Drinking FountainAshland50Transient non-communityGroundwater
13Grandpa Tonys RestaurantAshland50Transient non-communityGroundwater
14Prentice Park Comfort StationAshland50Transient non-communityGroundwater
15St Pauls Lutheran ChurchAshland50Transient non-communityGroundwater
16Lapointe Elementary Library and ClinicAshland40Transient non-communityGroundwater
17Wi Dnr Copper Falls Picnic Area and Campground NAshland40Transient non-communityGroundwater
18Wildwood Haven Resort and CampgroundAshland40Transient non-communityGroundwater
19Xcel EnergyAshland34Non-transient non-communityGroundwater
20Wi Dnr Copper Falls Park Office and Bath House ShowersAshland33Transient non-communityGroundwater
21Clam Lake Junction LLCAshland30Transient non-communityGroundwater
22Boomers Tavern N Hall LLCAshland27Transient non-communityGroundwater
23Dollar General 23595Ashland27Transient non-communityGroundwater
24RansomsAshland26Transient non-communityGroundwater
25St Johns United Church of ChristAshland25Transient non-communityGroundwater
26Darlings GroceryAshland25Transient non-communityGroundwater
27Farm House Madeline IslandAshland25Transient non-communityGroundwater
28Toms Burned Down CafeAshland25Transient non-communityGroundwater
29Calvary Tabernacle ChurchAshland25Transient non-communityGroundwater
30Madeline Island Yacht Club Inc.Ashland25Transient non-communityGroundwater
31Madeline Island Historical MuseumAshland25Transient non-communityGroundwater
32Midway BarAshland25Transient non-communityGroundwater
33La Pointe Dump StationAshland25Transient non-communityGroundwater
34Mellen Country ClubAshland25Transient non-communityGroundwater
35Maple Grove TavernAshland25Transient non-communityGroundwater
36U S N P Apostle Is Stockton Is Pi Stw01Ashland25Transient non-communityGroundwater
37Parkside TownhousesAshland25Transient non-communityGroundwater
38Lakeview PlaceAshland25Transient non-communityGroundwater
39Northern Lure ResortAshland25Transient non-communityGroundwater
40Madeline Island Chamber Music Student LodgingAshland25Transient non-communityGroundwater
41Airport InnAshland25Transient non-communityGroundwater
42Elkhorn LodgeAshland25Transient non-communityGroundwater
43Hudson SquareAshland25Transient non-communityGroundwater
44Madeline Island Golf ClubAshland25Transient non-communityGroundwater
45Solstice Outdoors Inc. Dba - the SandbarAshland25Transient non-communityGroundwater
46Northwoods Bar and GrillAshland25Transient non-communityGroundwater
47Local Bar and Grille theAshland25Transient non-communityGroundwater
48Old Apostolic Lutheran ChurchAshland25Transient non-communityGroundwater
49Drop Tine Bar and GrillAshland25Transient non-communityGroundwater
50Lakeside CondominiumsAshland25Transient non-communityGroundwater

All other water systems in Ashland County (32)

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

Ashland County water systems: frequently asked questions

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

EPA's SDWIS records file 82 active public water systems under Ashland County, Wisconsin: 5 community systems (6.1%), 2 non-transient non-community systems (2.4%) and 75 transient non-community systems (91%).

Who supplies drinking water in Ashland County, WI?

The largest community water systems filed under Ashland County are Ashland Water Utility (8,000 people served), Glidden Sanitary District (750 people served) and Mellen Water Utility (731 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 Ashland County's drinking water come from groundwater or surface water?

Of the 82 active public water systems in Ashland County, 99% draw mainly on groundwater and 1.2% on surface water, counting purchased supplies. The largest system, Ashland Water Utility, uses surface water.

Where can I find a water quality report for Ashland 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. 5 community systems are filed under Ashland 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 Ashland 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 Ashland County, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/ashland (data as of October 1, 2026).