Well Water in Ontonagon County, MI: Testing, Contractors and Rules
About 775 households in Ontonagon County, 32% of the county, rely on a private well. Nobody tests that water unless the owner does.
About one in 3 households in Ontonagon County relies on a private well, around 775 homes. Outside the towns with public water, wells are the norm here.
Local rules for wells in Ontonagon County
In Ontonagon County the local health department issues the well permit, inspects construction and requires a water sample before a new well goes into service, as Michigan’s well code requires. Ask the same office whether the county runs a time-of-sale evaluation program, since several Michigan counties do.
At a glance
Michigan requires new wells to be tested at installation under the well construction code (Part 127 of the Public Health Code). Local health departments issue the permit and require the sample.
No statewide requirement, but several counties run time-of-sale or point-of-sale well and septic evaluation programs. Check the county page.
EGLE recommends testing for coliform bacteria, nitrate and nitrite, fluoride, chloride, sulfate, sodium, hardness, and metals including arsenic, lead, iron, manganese, copper, uranium and others. Bacteria and nitrate yearly; a full chemistry panel every few years or when water changes.
Eight county health departments run their own onsite labs (Washtenaw, Oakland, Kalamazoo, Saginaw, Luce, Mackinac, Alger, Schoolcraft). Residents elsewhere can order a mail-in test through the EGLE Drinking Water Laboratory.
Getting your water tested near Ontonagon County
Ontonagon County has no certified lab within 40 miles, so most owners here test by mail. Order bottles from a certified lab, sample from the cold tap before any treatment, and ship the same day with an ice pack.
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Licensed well contractors serving Ontonagon County
No licensed contractor lists Ontonagon County as a home base or service area yet. The finder below searches the whole state; most drillers travel several counties for a job.
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Well depth and water chemistry
Well depth and water chemistry in Ontonagon County follow the rock underneath it. Depth varies across the county; the state well record search shows logs for nearby wells.
Varies by location. Check the state well record search for logs of nearby wells.
- Arsenic (southeast and thumb region)
- Nitrate (agricultural areas)
- Iron
- Manganese
- Hardness
- Coliform bacteria
- PFAS near known sites
Neighboring counties: Gogebic County, Baraga County, Houghton County, Iron County.
What well work costs in Ontonagon County
National ranges from published 2025 to 2026 contractor pricing. Local quotes vary with depth, access and materials.
Questions Ontonagon County well owners ask
How many homes in Ontonagon County are on a well?
About 775, or 32% of households, based on Census housing data and state well surveys. The share is highest outside the towns with public water.
Where is the closest certified lab to Ontonagon County?
There is no certified lab within 40 miles. Use a mail-in kit from a Michigan certified lab, or the county health department if it collects samples.
Do I need a permit to drill a well in Ontonagon County?
Yes. The local health department issues the permit and inspects the well under the Michigan well construction code.
What does a well test cost near Ontonagon County?
A bacteria and nitrate test runs $25 to $75 at most certified labs; a full panel with metals is $150 to $400. Mail-in kits cost about the same as walking in.