Aqua Ohio - Tomahawk Utilities, OH
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Aqua Ohio - Tomahawk Utilities serves about 715 people through 293 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Columbiana County, Ohio. EPA system ID: OH1502512; phone on file: 330-755-1100. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Aqua Ohio - Tomahawk Utilities's lead record
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Aqua Ohio - Tomahawk Utilities is 2.5 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 2.5 ppb |
| 2021 | 0 (not detected) |
| 2018 | 2.2 ppb |
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. Aqua Ohio - Tomahawk Utilities's reported as 0 (not detected) sits at the 19th percentile in Ohio and the 25th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
16 other systems share Columbiana County; 10 of them have a higher latest lead result than Aqua Ohio - Tomahawk Utilities. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Salem City | 16,850 | 9.4 ppb |
| East Liverpool City | 12,586 | 0.31 ppb |
| Buckeye Water District - Ohio River | 10,300 | 5 ppb |
| Columbiana City Pws | 6,727 | 0 (not detected) |
| East Palestine Village Pws | 4,761 | 4.17 ppb |
| Lisbon Village | 2,821 | 11.1 ppb |
| Leetonia Village Pws | 1,833 | 2.85 ppb |
| New Waterford Village Pws | 1,238 | 2.15 ppb |
| Washingtonville Village Pws | 801 | 2.96 ppb |
| Columbiana County-County Home Rd Pws | 200 | 1.43 ppb |
What to do in your house
Look up your address in Aqua Ohio - Tomahawk Utilities's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Aqua Ohio - Tomahawk Utilities 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. Small systems behave differently: why small systems go over more often.