Detroit City Of, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 7.5 ppb (monitoring period 2025-2025). 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.
Detroit City Of at a glance
Detroit City Of serves about 633,218 people through 237,000 service connections, which makes it a very 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: MI0001800; phone on file: 313-267-1239. They can tell you what your service line is made of and whether they pay to replace it.
Detroit City Of's lead record
That is down 5.2 ppb from 12.7 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Detroit City Of is 12.7 ppb across 8 monitoring periods, none of them over 15 ppb (3 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 7.5 ppb |
| 2024 | 12.7 ppb over 10 |
| 2023 | 9.4 ppb |
| 2022 | 12.3 ppb over 10 |
| 2021 | 12.33 ppb over 10 |
| 2020 | 8.7 ppb |
| 2019 | 9.81 ppb |
| 2017 | 4.4 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. Detroit City Of's 7.5 ppb sits at the 93rd percentile in Michigan and the 95th nationally (higher means more lead).
Other water systems in Wayne County
43 other systems share Wayne County; 6 of them have a higher latest lead result than Detroit City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| 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) |
| Northville Township | 32,103 | 0.9 ppb |
Next steps for Detroit, MI
Test your own tap with a certified lab first-draw sample; Detroit, 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 Detroit City Of 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. What a 90th-percentile result does and does not tell you: how to read a lead result. The action level is dropping - the 10 ppb rule from 2027.