Home/Wayne County, MI
Michigan -- population 1,792,549

Wayne County, MI Property Research

Real data from four public sources, not an internal estimate: the EPA's radon zone classification, Census housing-age records, FEMA's natural hazard risk index, and NOAA's recorded storm history for this county. Every figure below links to where it actually comes from.

Hazard Summary

Wayne County, MI hazard summary: FEMA National Risk Index rated Relatively High; EPA radon zone 3 of 3; most frequently recorded hazard is thunderstorm wind (132 events, 2015-2024).

Radon Risk

Zone 3 -- low potential. EPA predicts an average indoor radon screening level below 2 pCi/L for this county.

This is a county-wide prediction from geology and soil data, not a measurement of any specific home -- EPA recommends testing every home regardless of zone. See our guide on negotiating radon mitigation after inspection.

Source: EPA Map of Radon Zones

Housing Age

Wayne County has 796,119 housing units. About 70% were built in 1969 or earlier -- old enough that knob-and-tube wiring, lead-based paint, and galvanized supply lines are all realistic possibilities worth checking for, not just a general inspection line item.

2020 or later
2,017
2010-2019
18,156
2000-2009
45,417
1990-1999
48,370
1980-1989
41,117
1970-1979
82,604
1960-1969
89,581
1950-1959
190,870
1940-1949
112,749
1939 or earlier
165,238

Does knob-and-tube wiring have to be replaced before closing?

Source: U.S. Census Bureau, ACS 5-Year Estimates, Table B25034

Natural Hazard Risk

FEMA rates Wayne County's overall natural hazard risk as Relatively High, relative to the rest of the country.

Cold WaveVery High
Strong WindVery High
TornadoVery High
Inland FloodingVery High
Heat WaveRelatively High
Source: FEMA National Risk Index

Recorded Storm History (2015-2024)

NOAA recorded 237 storm events in Wayne County between 2015 and 2024. This is actual event history, not a risk model -- the counts below are individually logged storms, not a prediction.

Thunderstorm Wind
132
Hail
23
Lakeshore Flood
22
Flood
18
Flash Flood
14
High Wind
10
Heavy Snow
9
Tornado
9
Source: NOAA National Centers for Environmental Information, Storm Events Database

Guides Relevant to This County's Housing Stock

Does a Standard Home Inspection Check for Asbestos?Can Cast Iron Sewer Pipes Fail a Standard Home Inspection?Can I buy a house with knob-and-tube wiring?Can You Get Homeowners Insurance with Knob and Tube Wiring?Does Knob and Tube Wiring Have to Be Replaced Before Closing?What Is a Federal Pacific Stab-Lok Panel and Why Inspectors Flag It?

Get Your Free Property Report

BeforeRegret pulls live seismic hazard data, validates the address, and builds era- and county-specific inspection priorities and seller questions into one report -- with anything not yet independently verified clearly labeled, not guessed at.

Get Your First Report Free

This page reports what these four public agencies have published for Wayne County as a whole -- it is not an assessment of any specific address or property, and does not replace a licensed home inspection, radon test, or insurance review for a specific home. Data last checked August 10, 2026.