St Henry Village, OH
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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. 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
St Henry Village serves about 2,596 people through 1,062 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 Mercer County, Ohio. EPA system ID: OH5401312; phone on file: 419-678-4030. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2025 (2.6 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for St Henry Village is 9.7 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 2.6 ppb |
| 2024 | 2.1 ppb |
| 2023 | 0 (not detected) |
| 2022 | 2.2 ppb |
| 2021 | 9.7 ppb |
| 2020 | 6.2 ppb |
| 2019 | 2.6 ppb |
| 2018 | 2.37 ppb |
| 2016 | 0 (not detected) |
Where this result ranks
Of the 1,079 Ohio systems with a lead result, the median latest reading is 0.7 ppb; 1 are over 15 ppb right now and 27 have gone over at some point. St Henry Village's 2 ppb sits at the 77th percentile in Ohio and the 72nd nationally (higher means more lead).
Other water systems in Mercer County
8 other systems share Mercer County; 1 of them has a higher latest lead result than St Henry Village. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Celina, City Of | 11,682 | 0 (not detected) |
| Coldwater Village | 4,774 | 0 (not detected) |
| Ft Recovery Village | 1,501 | 1.8 ppb |
| Rockford Village | 1,120 | 4 ppb |
| Mendon Village | 628 | 1.8 ppb |
| Chickasaw Village | 358 | 0 (not detected) |
| Saint Charles Center | 142 | 1.4 ppb |
| Grand Lake Estates | 103 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; St Henry, OH 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 St Henry 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.