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Eau Claire County, Wisconsin — public water systems

At a glance

111 active public water systems are filed under Eau Claire County, Wisconsin in EPA's SDWIS records, together reporting 92,606 people served. The largest is Eau Claire Waterworks, which reports serving 70,587 people. 16 are community water systems serving people where they live; the other 95 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

111

Population served

92.6K

Community systems

16

Groundwater share

100%

How does Eau Claire County compare with other Wisconsin counties?

Eau Claire County has the 43rd-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 92,606 people served in total, the 15th-largest county figure in the state and 1.8% of the statewide total. The average system here reports serving 834 people, about 78% above 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 Eau Claire County's drinking water come from?

By primary water source, Eau Claire County's active systems draw on groundwater (111, 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, Eau Claire Waterworks, draws primarily on groundwater.

What kinds of water systems operate in Eau Claire County?

Eau Claire County's active systems break down as 16 community systems (14%), 16 non-transient non-community systems (14%) and 79 transient non-community systems (71%). 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 (81%), local government (17%) and state government (1.8%).

The 50 largest water systems in Eau Claire County

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Active public water systems in Eau Claire County, Wisconsin
#Water systemCountyPopulation servedTypeSource
1Eau Claire WaterworksEau Claire70,587CommunityGroundwater
2Altoona WaterworksEau Claire9,627CommunityGroundwater
3Augusta WaterworksEau Claire1,450CommunityGroundwater
4Fall Creek WaterworksEau Claire1,269CommunityGroundwater
5Hillcrest Estates MHPEau Claire850CommunityGroundwater
6Menards Old Mill CenterEau Claire730Non-transient non-communityGroundwater
7Ferguson Orchard-Eau ClaireEau Claire610Transient non-communityGroundwater
8Haven Christian Church Inc., theEau Claire457Transient non-communityGroundwater
9Fairchild WaterworksEau Claire451CommunityGroundwater
10Villa Diann MHPEau Claire420CommunityGroundwater
11Pine Edge MHPEau Claire300CommunityGroundwater
12Crestview Academy AdditionEau Claire203Non-transient non-communityGroundwater
13Mcdonalds RestaurantEau Claire200Transient non-communityGroundwater
14Menards Distribution Center OfficeEau Claire200Non-transient non-communityGroundwater
15Ec Co Altoona Boat LandingEau Claire200Transient non-communityGroundwater
16Ec Co Altoona BeachEau Claire200Transient non-communityGroundwater
17Priory theEau Claire185CommunityGroundwater
18Northstar Middle School AthleticEau Claire150Transient non-communityGroundwater
19Cozy MHP LLC FrontEau Claire111CommunityGroundwater
20Ec Co Harstad Park CmpgdEau Claire100Transient non-communityGroundwater
21Mikes Buckhorn BarEau Claire100Transient non-communityGroundwater
22Ec Co Coon Fork Lk Loop C Shower BldgEau Claire100Transient non-communityGroundwater
23Ec Co Coon Fork Lk Cmpgd Loop AEau Claire100Transient non-communityGroundwater
24Menards Dist Center NorthEau Claire100Non-transient non-communityGroundwater
25Foster BarEau Claire100Transient non-communityGroundwater
26Mega Holiday / Burger KingEau Claire100Transient non-communityGroundwater
27Equity Livestock SalesEau Claire100Transient non-communityGroundwater
28Countryside Estates MhcEau Claire96CommunityGroundwater
29W R R Environmental Services Co Inc.Eau Claire95Non-transient non-communityGroundwater
30Loyal Order of Moose Lodge 1408Eau Claire90Transient non-communityGroundwater
31Anthony Acres SchoolEau Claire85Non-transient non-communityGroundwater
32Brackett BarEau Claire80Transient non-communityGroundwater
33Eau Claire Coop Oil CoEau Claire80Non-transient non-communityGroundwater
34From the RootsEau Claire79Non-transient non-communityGroundwater
35Brown Hut TavernEau Claire75Transient non-communityGroundwater
36Harvest Moon Pub & EateryEau Claire75Transient non-communityGroundwater
37Welcome Matt theEau Claire75Transient non-communityGroundwater
38Bonnie Vale Park 1Eau Claire70CommunityGroundwater
39Allstate Peterbilt GroupEau Claire65Non-transient non-communityGroundwater
40Chippewa Valley Airport ServiceEau Claire65Transient non-communityGroundwater
41Sandstone BuildingEau Claire64Transient non-communityGroundwater
42Berghs Mobile Home ParkEau Claire60CommunityGroundwater
43Fellowship Alliance ChurchEau Claire60Transient non-communityGroundwater
44Westgate Trap HouseEau Claire60Transient non-communityGroundwater
45Dicks on 12Eau Claire60Transient non-communityGroundwater
46Down To Earth - Picture ThisEau Claire56Transient non-communityGroundwater
47Elk Lake TavernEau Claire55Transient non-communityGroundwater
48Precision PipelineEau Claire55Non-transient non-communityGroundwater
49Bonnie Vale Park 2Eau Claire51CommunityGroundwater
50Four Mile InnEau Claire50Transient non-communityGroundwater

All other water systems in Eau Claire County (61)

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

Eau Claire County water systems: frequently asked questions

How many public water systems are in Eau Claire County, Wisconsin?

EPA's SDWIS records file 111 active public water systems under Eau Claire County, Wisconsin: 16 community systems (14%), 16 non-transient non-community systems (14%) and 79 transient non-community systems (71%).

Who supplies drinking water in Eau Claire County, WI?

The largest community water systems filed under Eau Claire County are Eau Claire Waterworks (70,587 people served), Altoona Waterworks (9,627 people served) and Augusta Waterworks (1,450 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 Eau Claire County's drinking water come from groundwater or surface water?

Of the 111 active public water systems in Eau Claire County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Eau Claire Waterworks, uses groundwater.

Where can I find a water quality report for Eau Claire 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. 16 community systems are filed under Eau Claire 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 Eau Claire 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 Eau Claire County, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/eau-claire (data as of October 1, 2026).