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Pierce County, Wisconsin — public water systems

At a glance

95 active public water systems are filed under Pierce County, Wisconsin in EPA's SDWIS records, together reporting 32,378 people served. The largest is River Falls Waterworks, which reports serving 16,000 people. 11 are community water systems serving people where they live; the other 84 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

95

Population served

32.4K

Community systems

11

Groundwater share

100%

How does Pierce County compare with other Wisconsin counties?

Pierce County has the 48th-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 32,378 people served in total, the 34th-largest county figure in the state and 0.6% of the statewide total. The average system here reports serving 341 people, about 27% 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 Pierce County's drinking water come from?

By primary water source, Pierce County's active systems draw on groundwater (95, 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, River Falls Waterworks, draws primarily on groundwater.

What kinds of water systems operate in Pierce County?

Pierce County's active systems break down as 11 community systems (12%), 10 non-transient non-community systems (11%) and 74 transient non-community systems (78%). 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 (87%), local government (11%) and state government (2.1%).

The 50 largest water systems in Pierce County

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Active public water systems in Pierce County, Wisconsin
#Water systemCountyPopulation servedTypeSource
1River Falls WaterworksPierce16,000CommunityGroundwater
2Prescott WaterworksPierce4,258CommunityGroundwater
3Ellsworth WaterworksPierce3,304CommunityGroundwater
4Spring Valley WaterworksPierce1,409CommunityGroundwater
5Elmwood WaterworksPierce798CommunityGroundwater
6Belle Ame VineyardPierce500Transient non-communityGroundwater
7Bay City WaterworksPierce499CommunityGroundwater
8Ave Maria AcademyPierce226Non-transient non-communityGroundwater
9Meyer Utility Structures LLCPierce225Non-transient non-communityGroundwater
10Plum Petroleum LLCPierce202Transient non-communityGroundwater
11Captain Jacks SaloonPierce200Transient non-communityGroundwater
12Plum City PerkPierce200Transient non-communityGroundwater
13Exile BarPierce200Transient non-communityGroundwater
14St Croix ImprovementsPierce175CommunityGroundwater
15Plum City High SchoolPierce160Non-transient non-communityGroundwater
16Ellsworth Coop CreameryPierce150Non-transient non-communityGroundwater
17Hager Heights Drive inPierce150Transient non-communityGroundwater
18Our Saviors Lutheran ChurchPierce140Transient non-communityGroundwater
19C3 ChurchPierce127Transient non-communityGroundwater
20Plum City Elementary SchoolPierce125Non-transient non-communityGroundwater
21Plum City Care Center Nursing HomePierce120CommunityGroundwater
22Last Resort CampgroundPierce120Transient non-communityGroundwater
23Maiden Rock Water UtilityPierce118CommunityGroundwater
24Freedom Island CmpgdPierce110Transient non-communityGroundwater
25Clifton Highlands GolfPierce100Transient non-communityGroundwater
26Freedom Island Cmpgd - NorthPierce100Transient non-communityGroundwater
27Forestville Winery and Event CenterPierce100Transient non-communityGroundwater
28Nugget Lake County Park - CmpgdPierce100Transient non-communityGroundwater
29Nugget Lake County Park - Picnic AreaPierce100Transient non-communityGroundwater
30St Pauls United Ch of ChristPierce100Transient non-communityGroundwater
31Netties VoltaPierce90Transient non-communityGroundwater
32Vino in the ValleyPierce75Transient non-communityGroundwater
33Heartland Montessori SchoolPierce64Non-transient non-communityGroundwater
34Honey Hole Tavern thePierce60Transient non-communityGroundwater
35Svea Lutheran ChurchPierce60Transient non-communityGroundwater
36Harbor BarPierce60Transient non-communityGroundwater
3729 ExpressPierce60Transient non-communityGroundwater
38Nestle Purina Pet Care CoPierce55Non-transient non-communityGroundwater
39Valley Bar & Grill, thePierce50Transient non-communityGroundwater
40Clifton Hollow Golf CoursePierce50Transient non-communityGroundwater
41Spring Valley Golf CoursePierce50Transient non-communityGroundwater
42Shady GrovePierce50Transient non-communityGroundwater
43RidgetopPierce50Transient non-communityGroundwater
44Rush River Lutheran ChurchPierce50Transient non-communityGroundwater
45Gas LitePierce50Transient non-communityGroundwater
46Country Manor AptsPierce50CommunityGroundwater
47Plummer Concrete & Associates Inc.Pierce45Non-transient non-communityGroundwater
48Wieser Concrete Products Inc.Pierce45Non-transient non-communityGroundwater
49Pierce-Pepin Cooperative ServicesPierce40Non-transient non-communityGroundwater
50Kingdom Hall Jehovah Wt ChPierce40Transient non-communityGroundwater

All other water systems in Pierce County (45)

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

Pierce County water systems: frequently asked questions

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

EPA's SDWIS records file 95 active public water systems under Pierce County, Wisconsin: 11 community systems (12%), 10 non-transient non-community systems (11%) and 74 transient non-community systems (78%).

Who supplies drinking water in Pierce County, WI?

The largest community water systems filed under Pierce County are River Falls Waterworks (16,000 people served), Prescott Waterworks (4,258 people served) and Ellsworth Waterworks (3,304 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 Pierce County's drinking water come from groundwater or surface water?

Of the 95 active public water systems in Pierce County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, River Falls Waterworks, uses groundwater.

Where can I find a water quality report for Pierce 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. 11 community systems are filed under Pierce 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 Pierce 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 Pierce County, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/pierce (data as of October 1, 2026).