Timberlake Water System, OH
Lead detected, under the action levels
Latest 90th-percentile lead: 1.8 ppb (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. 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.
About Timberlake Water System
Timberlake Water System serves about 1,600 people through 350 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Franklin County, Ohio. EPA system ID: OH2501812; phone on file: 614-525-5850. 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 1.2 ppb from 3 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Timberlake Water System is 6.7 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.8 ppb |
| 2024 | 3 ppb |
| 2023 | 4.8 ppb |
| 2022 | 2.4 ppb |
| 2021 | 6.7 ppb |
| 2020 | 0 (not detected) |
| 2019 | 5.2 ppb |
| 2018 | 0 (not detected) |
Against other Ohio systems
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. Timberlake Water System's 1.8 ppb sits at the 73rd percentile in Ohio and the 67th nationally (higher means more lead).
Neighbouring systems
25 other systems share Franklin County; 5 of them have a higher latest lead result than Timberlake Water System. 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 |
| Westerville City Pws | 39,000 | 1 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) |
Your move
Test your own tap with a certified lab first-draw sample; Columbus, 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 Timberlake Water System 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.