Warren, City Of, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 2.7 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.
Who runs the water here
Warren, City Of serves about 134,056 people through 49,386 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 Macomb County, Michigan. EPA system ID: MI0006900; phone on file: 586-759-9224. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 11.3 ppb from 14 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Warren, City Of is 14 ppb across 8 monitoring periods, none of them over 15 ppb (4 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.7 ppb |
| 2024 | 14 ppb over 10 |
| 2023 | 7.8 ppb |
| 2022 | 11.3 ppb over 10 |
| 2021 | 7.35 ppb |
| 2020 | 10.94 ppb over 10 |
| 2019 | 11.76 ppb over 10 |
| 2017 | 0 (not detected) |
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. Warren, City Of's 2.7 ppb sits at the 73rd percentile in Michigan and the 79th nationally (higher means more lead).
Other water systems in Macomb County
25 other systems share Macomb County; 2 of them have a higher latest lead result than Warren, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sterling Heights, City Of | 127,000 | 0 (not detected) |
| Clinton Township | 100,513 | 1.2 ppb |
| Macomb Township | 90,000 | 0 (not detected) |
| Shelby Township | 72,000 | 0 (not detected) |
| St. Clair Shores, City Of | 59,715 | 1.1 ppb |
| Roseville, City Of | 47,299 | 8.68 ppb |
| Chesterfield Township | 41,650 | 0 (not detected) |
| Eastpointe, City Of | 32,442 | 0 (not detected) |
| Harrison Township | 24,314 | 1 ppb |
| Mount Clemens, City Of | 16,314 | 1.6 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Warren, 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 Warren, 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. Size matters more than most people expect: small vs large water systems.