Oak Grove Village, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 0.6 ppb (monitoring period 2026-2028). 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.
Oak Grove Village at a glance
Oak Grove Village serves about 385 people through 154 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Jefferson County, Michigan. EPA system ID: IL0810200; phone on file: 248-626-0737. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 1.8 ppb from 2.4 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Oak Grove Village is 2.5 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0.6 ppb |
| 2025 | 2.4 ppb |
| 2024 | 0 (not detected) |
| 2023 | 2.5 ppb |
| 2022 | 2.3 ppb |
| 2022 | 0 (not detected) |
How Oak Grove Village 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. Oak Grove Village's 0.6 ppb sits at the 40th percentile in Michigan and the 45th nationally (higher means more lead).
Nearby utilities
3 other systems share Jefferson County; 3 of them have a higher latest lead result than Oak Grove Village. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Oak Ridge Mobile Com 1 & 2 | 133 | 1.03 ppb |
| Oak Ridge Mobile Com 4 | 60 | 13.49 ppb |
| Oak Ridge Mobile Com 3 | 58 | 3.54 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Farmington Hills, 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 Oak Grove Village 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.