Madison Township, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 4 ppb (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Madison Township
Madison Township serves about 3,480 people through 1,160 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Lenawee County, Michigan. EPA system ID: MI0004006; phone on file: 517-263-9313. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2020 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Madison Township is 4 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 4 ppb |
| 2020 | 3 ppb |
| 2019 | 2 ppb |
| 2018 | 2 ppb |
| 2018 | 2 ppb |
| 2017 | 4 ppb |
How Madison Township compares
Of the 1,227 Michigan systems with a lead result, the median latest reading is 1 ppb; 31 are over 15 ppb right now and 109 have gone over at some point. Madison Township's 4 ppb sits at the 84th percentile in Michigan and the 88th nationally (higher means more lead).
Other water systems in Lenawee County
25 other systems share Lenawee County; 2 of them have a higher latest lead result than Madison Township. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Adrian | 23,663 | 0 (not detected) |
| Tecumseh | 8,521 | 3 ppb |
| Blissfield | 3,276 | 2 ppb |
| Clinton | 2,336 | 2 ppb |
| Hudson | 2,307 | 0 (not detected) |
| Morenci | 2,220 | 1.5 ppb |
| Deerfield | 943 | - |
| Onsted | 907 | 4 ppb |
| Fairfield Township | 717 | 2 ppb |
| Britton | 611 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Adrian, MI may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Madison Township whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1720 ppb (copper action level 1,300 ppb).
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.