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Keweenaw County, Michigan — public water systems

At a glance

19 active public water systems are filed under Keweenaw County, Michigan in EPA's SDWIS records, together reporting 2,701 people served. The largest is Keweenaw Mountain Lodge, which reports serving 485 people. 5 are community water systems serving people where they live; the other 14 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

19

Population served

2.7K

Community systems

5

Groundwater share

84.2%

How does Keweenaw County compare with other Michigan counties?

Keweenaw County has the 83rd-most active public water systems among the 131 counties listed for active Michigan systems in EPA records; among the 88 with 3 or more systems, the median has 92. Its systems report 2,701 people served in total, the 83rd-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 142 people, well below the Michigan average of 847. 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 Keweenaw County's drinking water come from?

By primary water source, Keweenaw County's active systems draw on groundwater (13, 68%), surface water (3, 16%), groundwater under influence of surface water (2, 11%) and purchased groundwater (1, 5.3%). Overall, 84% rely mainly on groundwater (including purchased groundwater) and 16% on surface water, compared with 97% and 3.1% across Michigan. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Keweenaw Mountain Lodge, draws primarily on groundwater under influence of surface water.

What kinds of water systems operate in Keweenaw County?

Keweenaw County's active systems break down as 5 community systems (26%) and 14 transient non-community systems (74%). 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 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 (47%), local government (26%), federal government (16%) and state government (11%).

Water systems in Keweenaw County

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Active public water systems in Keweenaw County, Michigan
#Water systemCountyPopulation servedTypeSource
1Keweenaw Mountain LodgeKeweenaw485Transient non-communityGroundwater under influence of surface water
2Isle Royale-Rock HarborKeweenaw335Transient non-communitySurface water
3Eagle Harbor TownshipKeweenaw300CommunityGroundwater
4Dnr - Fort Wilkins State ParkKeweenaw225Transient non-communityGroundwater
5Grant Township - Copper HarborKeweenaw200CommunityGroundwater
6Mount Bohemia Ski ResortKeweenaw200Transient non-communityGroundwater
7AhmeekKeweenaw148CommunityPurchased groundwater
8Houghton TownshipKeweenaw138CommunityGroundwater
9Isle Royale - WindigoKeweenaw115Transient non-communitySurface water
10Trails End CampgroundKeweenaw100Transient non-communityGroundwater
11Sunset Bay CampgroundKeweenaw100Transient non-communityGroundwater
12Cliffview Bar & RoadhouseKeweenaw75Transient non-communityGroundwater
13Isle Royale - Mott IslandKeweenaw75Transient non-communitySurface water
14Aqua Log Cabins - Black Bear Inc..Keweenaw44Transient non-communityGroundwater
15Sherman TownshipKeweenaw40CommunityGroundwater
16Fresh Coast CabinsKeweenaw36Transient non-communityGroundwater under influence of surface water
17Dockside ResortKeweenaw30Transient non-communityGroundwater
18Wilderness Resort LLCKeweenaw30Transient non-communityGroundwater
19Mdot - Esrey Park Wayside P138Keweenaw25Transient non-communityGroundwater

Keweenaw County water systems: frequently asked questions

How many public water systems are in Keweenaw County, Michigan?

EPA's SDWIS records file 19 active public water systems under Keweenaw County, Michigan: 5 community systems (26%) and 14 transient non-community systems (74%).

Who supplies drinking water in Keweenaw County, MI?

The largest community water systems filed under Keweenaw County are Eagle Harbor Township (300 people served), Grant Township - Copper Harbor (200 people served) and Ahmeek (148 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 Keweenaw County's drinking water come from groundwater or surface water?

Of the 19 active public water systems in Keweenaw County, 84% draw mainly on groundwater and 16% on surface water, counting purchased supplies. The largest system, Keweenaw Mountain Lodge, uses groundwater under influence of surface water.

Where can I find a water quality report for Keweenaw 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 Keweenaw 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 Keweenaw 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 Michigan 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 Keweenaw County, Michigan”, https://aquacensus.com/water-systems/michigan/keweenaw (data as of October 1, 2026).