2 cities covered
Michigan water quality and radon, by city
0 of 2 covered Michigan cities use chloramine in at least part of the system, and 1 have hard water. 9 of Michigan's 83 counties are EPA radon zone 1.
| City | Disinfectant | Hardness | Lead | PFAS | Radon |
|---|---|---|---|---|---|
| Detroit | Chlorine | 5.6 gpg | 7.5 ppb | Not detected | Zone 3 |
| Grand Rapids | Chlorine | 8.1 gpg | 7 ppb | Not detected | Zone 2 |
Michigan radon zones
Zone 1 (highest)9 counties
Zone 232 counties
Zone 3 (lowest)42 counties