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
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Ashland Water Utility | Ashland | 8,000 | Community | Surface water |
| 2 | Glidden Sanitary District | Ashland | 750 | Community | Groundwater |
| 3 | Mellen Water Utility | Ashland | 731 | Community | Groundwater |
| 4 | Butternut Waterworks | Ashland | 283 | Community | Groundwater |
| 5 | Marengo Valley School | Ashland | 220 | Non-transient non-community | Groundwater |
| 6 | Hartzell Subdivision - Abbey Lane | Ashland | 115 | Transient non-community | Groundwater |
| 7 | Bobbers on the Lake | Ashland | 100 | Transient non-community | Groundwater |
| 8 | Beach Club | Ashland | 100 | Transient non-community | Groundwater |
| 9 | Madeline Island Music Camp Center Well | Ashland | 70 | Transient non-community | Groundwater |
| 10 | Aspen Ridge | Ashland | 50 | Community | Groundwater |
| 11 | Dollar General Inc. | Ashland | 50 | Transient non-community | Groundwater |
| 12 | Big Bay Island Park Parking Area Drinking Fountain | Ashland | 50 | Transient non-community | Groundwater |
| 13 | Grandpa Tonys Restaurant | Ashland | 50 | Transient non-community | Groundwater |
| 14 | Prentice Park Comfort Station | Ashland | 50 | Transient non-community | Groundwater |
| 15 | St Pauls Lutheran Church | Ashland | 50 | Transient non-community | Groundwater |
| 16 | Lapointe Elementary Library and Clinic | Ashland | 40 | Transient non-community | Groundwater |
| 17 | Wi Dnr Copper Falls Picnic Area and Campground N | Ashland | 40 | Transient non-community | Groundwater |
| 18 | Wildwood Haven Resort and Campground | Ashland | 40 | Transient non-community | Groundwater |
| 19 | Xcel Energy | Ashland | 34 | Non-transient non-community | Groundwater |
| 20 | Wi Dnr Copper Falls Park Office and Bath House Showers | Ashland | 33 | Transient non-community | Groundwater |
| 21 | Clam Lake Junction LLC | Ashland | 30 | Transient non-community | Groundwater |
| 22 | Boomers Tavern N Hall LLC | Ashland | 27 | Transient non-community | Groundwater |
| 23 | Dollar General 23595 | Ashland | 27 | Transient non-community | Groundwater |
| 24 | Ransoms | Ashland | 26 | Transient non-community | Groundwater |
| 25 | St Johns United Church of Christ | Ashland | 25 | Transient non-community | Groundwater |
| 26 | Darlings Grocery | Ashland | 25 | Transient non-community | Groundwater |
| 27 | Farm House Madeline Island | Ashland | 25 | Transient non-community | Groundwater |
| 28 | Toms Burned Down Cafe | Ashland | 25 | Transient non-community | Groundwater |
| 29 | Calvary Tabernacle Church | Ashland | 25 | Transient non-community | Groundwater |
| 30 | Madeline Island Yacht Club Inc. | Ashland | 25 | Transient non-community | Groundwater |
| 31 | Madeline Island Historical Museum | Ashland | 25 | Transient non-community | Groundwater |
| 32 | Midway Bar | Ashland | 25 | Transient non-community | Groundwater |
| 33 | La Pointe Dump Station | Ashland | 25 | Transient non-community | Groundwater |
| 34 | Mellen Country Club | Ashland | 25 | Transient non-community | Groundwater |
| 35 | Maple Grove Tavern | Ashland | 25 | Transient non-community | Groundwater |
| 36 | U S N P Apostle Is Stockton Is Pi Stw01 | Ashland | 25 | Transient non-community | Groundwater |
| 37 | Parkside Townhouses | Ashland | 25 | Transient non-community | Groundwater |
| 38 | Lakeview Place | Ashland | 25 | Transient non-community | Groundwater |
| 39 | Northern Lure Resort | Ashland | 25 | Transient non-community | Groundwater |
| 40 | Madeline Island Chamber Music Student Lodging | Ashland | 25 | Transient non-community | Groundwater |
| 41 | Airport Inn | Ashland | 25 | Transient non-community | Groundwater |
| 42 | Elkhorn Lodge | Ashland | 25 | Transient non-community | Groundwater |
| 43 | Hudson Square | Ashland | 25 | Transient non-community | Groundwater |
| 44 | Madeline Island Golf Club | Ashland | 25 | Transient non-community | Groundwater |
| 45 | Solstice Outdoors Inc. Dba - the Sandbar | Ashland | 25 | Transient non-community | Groundwater |
| 46 | Northwoods Bar and Grill | Ashland | 25 | Transient non-community | Groundwater |
| 47 | Local Bar and Grille the | Ashland | 25 | Transient non-community | Groundwater |
| 48 | Old Apostolic Lutheran Church | Ashland | 25 | Transient non-community | Groundwater |
| 49 | Drop Tine Bar and Grill | Ashland | 25 | Transient non-community | Groundwater |
| 50 | Lakeside Condominiums | Ashland | 25 | Transient non-community | Groundwater |
All other water systems in Ashland County (32)
The remaining active systems filed under Ashland County, largest first, with the population each reports serving.
- Barrel Inn25
- Ashland Town Hall25
- St Annes Catholic Church25
- Ashland Municipal Airport Jfk Memorial Airport25
- Sanborn Methodist Church25
- Church of Jesus Christ of Latter Day Saints25
- Madeline Island School of the Arts Cottages25
- Wildwood Haven Resort Campground 225
- Madeline Island School of the Arts Classrooms25
- Prentice Park Bathrooms25
- Madeline Island Water Co25
- Inn on Madeline Island Rendezvous Bldg & Pub and Wine Bar25
- Lightkeepers Lodge25
- Fairway Suites25
- Madeline Island Music Camp Performance Hall Clubhouse25
- Ashland Mennonite Church25
- Alan Tomczak Park25
- Maslowski Beach Bathrooms25
- Maslowski Beach East25
- Maslowski Beach Wishing Well25
- Prentice Park Pavilion East25
- Prentice Park Pavilion West25
- Prentice Park Rv Cmgd25
- Rock House the25
- Wi Dnr Big Bay Campground East25
- Wi Dnr Big Bay Park Visitors Entrance Office25
- Wi Dnr Big Bay Shower Facility25
- Highbridge Oasis25
- Big Bay Island Park Showers25
- Harry E Nelson Community Center25
- Big Bay Island Park Campground Center25
- Jonis Beach25
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).