Pentwater, MI
Lead detected, under the action levels
Latest 90th-percentile lead: 4.6 ppb (monitoring period 2022-2024). 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.
Pentwater at a glance
Pentwater serves about 857 people through 715 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Oceana County, Michigan. EPA system ID: MI0005260; phone on file: 231-869-8301. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
The highest 90th-percentile result EPA holds for Pentwater is 4.6 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 4.6 ppb |
How Pentwater 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. Pentwater's 4.6 ppb sits at the 86th percentile in Michigan and the 90th nationally (higher means more lead).
Neighbouring systems
4 other systems share Oceana County; 0 of them have a higher latest lead result than Pentwater. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hart | 2,126 | 2.75 ppb |
| Shelby | 1,964 | 2.4 ppb |
| Hylander Valley | 158 | 0.7 ppb |
| Greenlawn Mobile Home Court | 100 | 4 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Pentwater, 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 Pentwater 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. Systems that went over once often dip back under; here is what that means.