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Mille Lacs County, Minnesota — public water systems

At a glance

91 active public water systems are filed under Mille Lacs County, Minnesota in EPA's SDWIS records, together reporting 20,104 people served. The largest is Princeton, which reports serving 5,421 people. 8 are community water systems serving people where they live; the other 83 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

91

Population served

20.1K

Community systems

8

Groundwater share

100%

How does Mille Lacs County compare with other Minnesota counties?

Mille Lacs County has the 23rd-most active public water systems among the 94 counties listed for active Minnesota systems in EPA records; among the 87 with 3 or more systems, the median has 49. Its systems report 20,104 people served in total, the 41st-largest county figure in the state and 0.4% of the statewide total. The average system here reports serving 221 people, well below the Minnesota average of 820. 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 Mille Lacs County's drinking water come from?

By primary water source, Mille Lacs County's active systems draw on groundwater (91, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 98% and 1.5% across Minnesota. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Princeton, draws primarily on groundwater.

What kinds of water systems operate in Mille Lacs County?

Mille Lacs County's active systems break down as 8 community systems (8.8%), 1 non-transient non-community systems (1.1%) and 82 transient non-community systems (90%). 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 (86%), local government (9.9%) and state government (4.4%).

The 50 largest water systems in Mille Lacs County

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Active public water systems in Mille Lacs County, Minnesota
#Water systemCountyPopulation servedTypeSource
1PrincetonMille Lacs5,421CommunityGroundwater
2MilacaMille Lacs3,043CommunityGroundwater
3New Life Christian CenterMille Lacs1,000Transient non-communityGroundwater
4OnamiaMille Lacs831CommunityGroundwater
5IsleMille Lacs820CommunityGroundwater
6Broberg'S Country StoreMille Lacs500Transient non-communityGroundwater
7ForestonMille Lacs340CommunityGroundwater
8Koch'S Hardware HankMille Lacs300Transient non-communityGroundwater
9Carefree Acres Campsite Assn.Mille Lacs300Transient non-communityGroundwater
10Dairy Queen-OnamiaMille Lacs275Transient non-communityGroundwater
11Rum River Wayside Rest MndotMille Lacs250Transient non-communityGroundwater
12Izatys Townhouse AssociationMille Lacs250Transient non-communityGroundwater
13PeaseMille Lacs242CommunityGroundwater
14Zion Lutheran ChurchMille Lacs230Transient non-communityGroundwater
15Milaca Alliance ChurchMille Lacs210Transient non-communityGroundwater
16Father Hennepin State ParkMille Lacs200Transient non-communityGroundwater
17Bethel Christian Reformed ChurchMille Lacs200Transient non-communityGroundwater
18Happy'S Drive inMille Lacs200Transient non-communityGroundwater
19Hairy Mosquito Trading CompanyMille Lacs200Transient non-communityGroundwater
20Kingdom Hall of Jehovah'S WitnessesMille Lacs180Transient non-communityGroundwater
21Gateway One StopMille Lacs150Transient non-communityGroundwater
22Msa Flagship InnMille Lacs150Transient non-communityGroundwater
23Sacred Heart of Jesus ChurchMille Lacs150Transient non-communityGroundwater
24Mille Lacs Super StopMille Lacs150Transient non-communityGroundwater
25Rough Cut Bar and GrillMille Lacs150Transient non-communityGroundwater
26Izaty'S ResortMille Lacs150Transient non-communityGroundwater
27Northern Lights Ballroom & Banquet CenteMille Lacs150Transient non-communityGroundwater
28Reed'S Mille Lacs Lake Outpost StoreMille Lacs125Transient non-communityGroundwater
29Clyde'S Wood Fire GrillMille Lacs125Transient non-communityGroundwater
30Estes Brook Evangelical Free ChurchMille Lacs120Transient non-communityGroundwater
31Timber Bay Camp and Retreat CenterMille Lacs120Transient non-communityGroundwater
32Mugg'S of Mille LacsMille Lacs100Transient non-communityGroundwater
33Nitti'S Hunter'S Point ResortMille Lacs100Transient non-communityGroundwater
34Morning Star MarketMille Lacs100Transient non-communityGroundwater
35Long Siding StationMille Lacs100Transient non-communityGroundwater
36Eddy'S Resort, LLCMille Lacs100Transient non-communityGroundwater
37Tulibee TavernMille Lacs100Transient non-communityGroundwater
38Chico'S PlaceMille Lacs100Transient non-communityGroundwater
39Breakers of Sunset Bay Association Inc..Mille Lacs100Transient non-communityGroundwater
40Opstead Baptist ChurchMille Lacs100Transient non-communityGroundwater
41Johnson'S PortsideMille Lacs100Transient non-communityGroundwater
42Mille Lacs Northern Skys Rv ResortsMille Lacs100Transient non-communityGroundwater
43Veterans ClubMille Lacs100Transient non-communityGroundwater
44Blaze Credit UnionMille Lacs100Transient non-communityGroundwater
45BockMille Lacs83CommunityGroundwater
46Beachside ResortMille Lacs80Transient non-communityGroundwater
47St. Paul'S Lutheran ChurchMille Lacs80Transient non-communityGroundwater
48Green Acres Mobile Home ParkMille Lacs80CommunityGroundwater
49Kathio State ParkMille Lacs75Transient non-communityGroundwater
50North Star ResortMille Lacs75Transient non-communityGroundwater

All other water systems in Mille Lacs County (41)

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

Mille Lacs County water systems: frequently asked questions

How many public water systems are in Mille Lacs County, Minnesota?

EPA's SDWIS records file 91 active public water systems under Mille Lacs County, Minnesota: 8 community systems (8.8%), 1 non-transient non-community systems (1.1%) and 82 transient non-community systems (90%).

Who supplies drinking water in Mille Lacs County, MN?

The largest community water systems filed under Mille Lacs County are Princeton (5,421 people served), Milaca (3,043 people served) and Onamia (831 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 Mille Lacs County's drinking water come from groundwater or surface water?

Of the 91 active public water systems in Mille Lacs County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Princeton, uses groundwater.

Where can I find a water quality report for Mille Lacs 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. 8 community systems are filed under Mille Lacs 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 Mille Lacs 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 Minnesota 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 Mille Lacs County, Minnesota”, https://aquacensus.com/water-systems/minnesota/mille-lacs (data as of October 1, 2026).