Twin Rivers Water Corporation, OH
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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 Twin Rivers Water Corporation
Twin Rivers Water Corporation serves about 245 people through 96 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Hamilton County, Ohio. EPA system ID: OH3102303; phone on file: 513-367-2835. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2024 (2.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Twin Rivers Water Corporation is 9.1 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2024 | 2.8 ppb |
| 2023 | 3.3 ppb |
| 2022 | 9.1 ppb |
| 2021 | 5.3 ppb |
| 2020 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 2.7 ppb |
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. Twin Rivers Water Corporation's 3 ppb sits at the 88th percentile in Ohio and the 81st nationally (higher means more lead).
Nearby utilities
10 other systems share Hamilton County; 0 of them have a higher latest lead result than Twin Rivers Water Corporation. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cincinnati Public Water System | 800,000 | 2.05 ppb |
| Norwood City Pws | 19,870 | 1.72 ppb |
| Indian Hill City Pws | 15,000 | 0 (not detected) |
| Harrison City Pws | 11,600 | 0 (not detected) |
| Wyoming City Pws | 9,700 | 0.5 ppb |
| Reading City Pws | 9,506 | 1.9 ppb |
| Cleves Village Pws | 6,000 | 0 (not detected) |
| Lockland Village Pws | 3,486 | 0 (not detected) |
| Glendale Village Pws | 2,500 | 0.7 ppb |
| Addyston Village Pws | 900 | 0 (not detected) |
Next steps for Harrison, OH
Test your own tap with a certified lab first-draw sample; Harrison, 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 Twin Rivers Water Corporation 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.