Grosse Ile Township, MI
Exceeded the action level in the past
Latest 90th-percentile lead: 4.4 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Grosse Ile Township
Grosse Ile Township serves about 10,788 people through 4,437 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Wayne County, Michigan. EPA system ID: MI0002870; phone on file: 734-676-4422. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 14.8 ppb from 19.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Grosse Ile Township is 19.2 ppb across 9 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4.4 ppb |
| 2025 | 19.2 ppb over 15 |
| 2024 | 10.3 ppb over 10 |
| 2023 | 6.9 ppb |
| 2022 | 7.8 ppb |
| 2021 | 6.27 ppb |
| 2020 | 5.41 ppb |
| 2019 | 4.2 ppb |
| 2017 | 5.8 ppb |
Against other Michigan systems
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. Grosse Ile Township's 4.4 ppb sits at the 86th percentile in Michigan and the 89th nationally (higher means more lead).
Nearby utilities
43 other systems share Wayne County; 14 of them have a higher latest lead result than Grosse Ile Township. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Detroit City Of | 633,218 | 7.5 ppb |
| Dearborn | 109,976 | 6 ppb |
| Canton Township | 99,627 | 0 (not detected) |
| Livonia | 96,942 | 0 (not detected) |
| Westland | 85,420 | 0 (not detected) |
| Taylor | 63,409 | 10.7 ppb |
| Dearborn Heights | 57,774 | 0 (not detected) |
| Redford Township | 49,504 | 8.2 ppb |
| Lincoln Park | 38,144 | 3.1 ppb |
| Brownstown Township | 33,194 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Grosse Ile, 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 Grosse Ile Township whether it covers that cost before hiring anyone - many utilities now do.
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. More in what a past exceedance means today.