Sherman Township, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 0.73 ppb (monitoring period 2023-2023). 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.
Sherman Township at a glance
Sherman Township serves about 40 people through 48 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Keweenaw County, Michigan. EPA system ID: MI0002590; phone on file: 906-296-1211. 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 2023 (0.38 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sherman Township is 14 ppb across 14 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0.73 ppb |
| 2023 | 0.38 ppb |
| 2022 | 0 (not detected) |
| 2022 | 0.24 ppb |
| 2021 | 0.56 ppb |
| 2021 | 0.51 ppb |
| 2020 | 3 ppb |
| 2019 | 1.2 ppb |
| 2018 | 0.66 ppb |
| 2018 | 5 ppb |
| 2017 | 14 ppb over 10 |
| 2017 | 5.1 ppb |
| 2016 | 2.4 ppb |
| 2016 | 1.3 ppb |
Where this result ranks
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. Sherman Township's 0.73 ppb sits at the 41st percentile in Michigan and the 47th nationally (higher means more lead).
Neighbouring systems
4 other systems share Keweenaw County; 1 of them has a higher latest lead result than Sherman Township. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Eagle Harbor Township | 300 | - |
| Grant Township - Copper Harbor | 200 | 0.78 ppb |
| Ahmeek | 148 | 0.29 ppb |
| Houghton Township | 138 | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Lake Linden, 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 Sherman Township whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1510 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.