Michigan Radon Map, Levels & Testing Guide
Browse the 3 listed county pages surfaced for Michigan. Open a listed county to compare its EPA zone, source caveats, testing meaning, and when mitigation pricing becomes worth checking.
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Official Evidence in Michigan
3 of 3 listed counties have official evidence
Open a county page to see the official source context: measurement fields, local burden, state percentile, and the next step for no reading, 2.0-3.9, or 4.0+ pCi/L.
100%
covered
Measured
3
State source
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CDC source
3
Needs source detail
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Measured Risk Leaders in Michigan
County rankings from actual reported radon tests
These lists rank the visible Michigan county pages by measured radon signals, not by the EPA zone label alone. Use them to spot where the state hub has a real data story before opening individual county pages.
3
measured counties
State-level evidence read
This hub has elevated measured counties, so the map is only the starting point.
The state hub is now doing a decision job: it separates first-click counties, retest counties, and lower-signal counties from 3 visible county measurement rows. 2 counties are elevated or high, including 1 where the EPA zone alone understates the measured signal.
First-click counties
Open Monroe County first when you need the strongest local answer. It is tagged Priority test from 30.4% 4.0+ - 3.9 pCi/L primary - 1,065 tests. 2 visible measured counties are elevated or high enough to review before lower-signal counties.
Buyer/seller lane
Buyer/seller lane: start with the elevated or high counties, require a fresh lowest-level test, and turn any 4.0+ property result into quote or credit math. The hub has 3 CDC-backed county rows to support that routing.
Retest lane
Retest lane: 2.0-3.9 pCi/L deserves more caution in the elevated/high county set than in lower-signal counties. The hub should send those users to county pages before product or cost paths.
Best county pages to open first
Start with these local evidence pages
Ranked by measured burden, 4.0+ share, test volume, and whether the EPA zone understates the measurement signal.
Monroe County
CDC Tracking
30.4% 4.0+ - 3.9 pCi/L primary - 1,065 tests
Monroe County should be opened before lower-signal counties: 30.4% of reported tests at or above 4.0 and 3.9 pCi/L primary result. It is strong enough for testing and retesting language on the hub.
Kalamazoo County
CDC Tracking
33.3% 4.0+ - 3.7 pCi/L primary - 3,261 tests
Kalamazoo County should be opened before lower-signal counties: 33.3% of reported tests at or above 4.0 and 3.7 pCi/L primary result. It is strong enough for testing and retesting language on the hub.
Kent County
CDC Tracking
16.5% 4.0+ - 2.5 pCi/L primary - 6,257 tests
Kent County belongs in the retest lane: 16.5% of reported tests at or above 4.0 and 2.5 pCi/L primary result. A 2.0-3.9 home result should be confirmed before the user dismisses it.
Highest 4.0+ share
Highest high-end reading
Measured pattern
Among 3 visible counties with measurement tables, 0 land in the high measured-burden band and 2 land in high or elevated measured-burden bands. That lets this hub rank counties by observed test distribution instead of repeating the EPA map.
Map vs measurements
1 elevated measured counties are not EPA Zone 1. Those are the pages where the actual test distribution matters more than a map-only answer.
Source strategy
The measured rows shown here use CDC Tracking. This is still official evidence, but the hub should keep source caveats visible until a stable state table is available.
Already Tested
View Michigan Cost Estimates
If you already have a radon result, skip the directory and move straight to local price guidance.
Understand the Number
2.0 vs 4.0 vs 8.0 pCi/L
Use the parent levels guide if you need the plain-English meaning of a radon result before browsing counties.
Need a Number First
Read the Testing Guide
Use the fastest valid radon test setup before you compare quotes or ask whether mitigation is worth it.
Browse Counties
Jump to the Directory
Open your county to see its EPA zone, testing meaning, and the point where mitigation becomes worth pricing.
Official State Resource
Michigan radon program and rules
Use the state program link to verify local radon guidance, disclosure language, and contractor credential expectations before you act on an estimate.
Disclosure rule tracked
Michigan requires sellers to complete a Seller's Disclosure Statement that includes environmental hazards such as radon.
Credential note
Michigan does not require specific radon licensing. NRPP or AARST certification is recommended.
Already tested? Get your itemized mitigation cost estimate.
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