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Dodge County, Wisconsin — public water systems

At a glance

180 active public water systems are filed under Dodge County, Wisconsin in EPA's SDWIS records, together reporting 73,453 people served. The largest is Beaver Dam Water Utility, which reports serving 16,200 people. 24 are community water systems serving people where they live; the other 156 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

180

Population served

73.5K

Community systems

24

Groundwater share

100%

How does Dodge County compare with other Wisconsin counties?

Dodge County has the 28th-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 73,453 people served in total, the 19th-largest county figure in the state and 1.4% of the statewide total. The average system here reports serving 408 people, about 13% 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 Dodge County's drinking water come from?

By primary water source, Dodge County's active systems draw on groundwater (180, 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, Beaver Dam Water Utility, draws primarily on groundwater.

What kinds of water systems operate in Dodge County?

Dodge County's active systems break down as 24 community systems (13%), 26 non-transient non-community systems (14%) and 130 transient non-community systems (72%). 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 (74%), local government (21%), state government (3.9%) and federal government (0.6%).

The 50 largest water systems in Dodge County

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Active public water systems in Dodge County, Wisconsin
#Water systemCountyPopulation servedTypeSource
1Beaver Dam Water UtilityDodge16,200CommunityGroundwater
2Waupun UtilitiesDodge8,056CommunityGroundwater
3Mayville WaterworksDodge5,112CommunityGroundwater
4Waupun Correctional InstDodge3,706CommunityGroundwater
5Horicon WaterworksDodge3,682CommunityGroundwater
6Lomira WaterworksDodge2,701CommunityGroundwater
7Juneau WaterworksDodge2,627CommunityGroundwater
8Fox Lake Correctional InstitutionDodge1,850CommunityGroundwater
9Fox Lake WaterworksDodge1,610CommunityGroundwater
10Wi Dot Rest Area 64 Lomira North BoundDodge1,601Transient non-communityGroundwater
11Wi Dot Rest Area 63 Lomira South BoundDodge1,601Transient non-communityGroundwater
12Quad GraphicsDodge1,550Non-transient non-communityGroundwater
13Theresa WaterworksDodge1,262CommunityGroundwater
14Hustisford WaterworksDodge1,063CommunityGroundwater
15Iron Ridge WaterworksDodge937CommunityGroundwater
16United Cooperative Store & OfficesDodge723Transient non-communityGroundwater
17Reeseville WaterworksDodge718CommunityGroundwater
18Station Hwy 33Dodge708Transient non-communityGroundwater
19Station 67Dodge707Transient non-communityGroundwater
20Brownsville WaterworksDodge630CommunityGroundwater
21Neosho StationDodge596Transient non-communityGroundwater
22Beaver Dam North Water Distribution SystemDodge550Non-transient non-communityGroundwater
23Clyman WaterworksDodge422CommunityGroundwater
24North Hills MHPDodge420CommunityGroundwater
25Lowell WaterworksDodge337CommunityGroundwater
26Leroy Sanitary District 1Dodge320CommunityGroundwater
27Immanuel Lutheran Church & SchDodge310Non-transient non-communityGroundwater
28Pribnows Maple InnDodge304Transient non-communityGroundwater
29Honor ElementaryDodge280Non-transient non-communityGroundwater
30The Fields of Clover Hill Golf CourseDodge270Transient non-communityGroundwater
31Immanuel Lutheran ChurchDodge256Transient non-communityGroundwater
32St Johns Catholic Church & ParsonageDodge252Transient non-communityGroundwater
33Harvest Evangelical Free ChurchDodge234Transient non-communityGroundwater
34Grande Cheese Co BrownsvilleDodge230Non-transient non-communityGroundwater
35Mountain Top Christian AcademyDodge207Non-transient non-communityGroundwater
36Field House Bar and Grill theDodge205Transient non-communityGroundwater
37Crystal Lake Park - Beach AreaDodge204Transient non-communityGroundwater
38Cantafio'S Buckhorn Steak HouseDodge203Transient non-communityGroundwater
39Bayside Supper ClubDodge202Transient non-communityGroundwater
40Lebanon Lutheran School - St Peters BldgDodge200Non-transient non-communityGroundwater
41Wisconsin Auto AuctionDodge190Transient non-communityGroundwater
42Hnr Intermediate SchoolDodge185Non-transient non-communityGroundwater
43Old Hickory Country Club Club HouseDodge175Transient non-communityGroundwater
44Shores of Fox LakeDodge172Transient non-communityGroundwater
45Boat House Pub & EateryDodge172Transient non-communityGroundwater
46Feils Supper ClubDodge170Transient non-communityGroundwater
47Fox Lake Golf ClubDodge170Transient non-communityGroundwater
48Hidden MeadowsDodge166CommunityGroundwater
49Equity Cooperative Livestock Sales AssocDodge160Transient non-communityGroundwater
50Wi Dot Drivers Licensing & TestingDodge156Transient non-communityGroundwater

All other water systems in Dodge County (130)

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

Dodge County water systems: frequently asked questions

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

EPA's SDWIS records file 180 active public water systems under Dodge County, Wisconsin: 24 community systems (13%), 26 non-transient non-community systems (14%) and 130 transient non-community systems (72%).

Who supplies drinking water in Dodge County, WI?

The largest community water systems filed under Dodge County are Beaver Dam Water Utility (16,200 people served), Waupun Utilities (8,056 people served) and Mayville Waterworks (5,112 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 Dodge County's drinking water come from groundwater or surface water?

Of the 180 active public water systems in Dodge County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Beaver Dam Water Utility, uses groundwater.

Where can I find a water quality report for Dodge 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. 24 community systems are filed under Dodge 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 Dodge 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 Dodge County, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/dodge (data as of October 1, 2026).