Westerville City Pws, OH
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2024-2026). 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.
Westerville City Pws at a glance
Westerville City Pws serves about 39,000 people through 13,624 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Franklin County, Ohio. EPA system ID: OH2503411; phone on file: 419-782-1886. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2023 (1.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Westerville City Pws is 1.5 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2023 | 1.5 ppb |
| 2020 | 0 (not detected) |
| 2019 | 1.2 ppb |
| 2018 | 0 (not detected) |
| 2017 | 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. Westerville City Pws's 1 ppb sits at the 58th percentile in Ohio and the 56th nationally (higher means more lead).
Neighbouring systems
25 other systems share Franklin County; 10 of them have a higher latest lead result than Westerville City Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Columbus Public Water System | 1,309,468 | 1.2 ppb |
| Reynoldsburg City Pws | 37,847 | 2.1 ppb |
| Gahanna City Pws | 33,258 | 0.5 ppb |
| Bexley City Pws | 14,250 | 0 (not detected) |
| Jefferson Water And Sewer District Pws | 11,294 | 2 ppb |
| Canal Winchester City Pws | 9,286 | 2.1 ppb |
| Sanitary District #4 | 8,575 | 1.3 ppb |
| Aqua Ohio - Blacklick | 7,100 | 0 (not detected) |
| Aqua Ohio - Huber Ridge Pws | 5,393 | 0 (not detected) |
| Aqua Ohio - Lake Darby | 3,562 | 0 (not detected) |
Next steps for Pataskala, OH
Test your own tap with a certified lab first-draw sample; Pataskala, 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 Westerville City Pws 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.