Western Water Company, OH
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 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.
Western Water Company at a glance
Western Water Company serves about 39,508 people through 17,717 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Warren County, Ohio. EPA system ID: OH8300512. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2024 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Western Water Company is 2 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.3 ppb |
| 2024 | 2 ppb |
| 2023 | 1.1 ppb |
| 2022 | 1.2 ppb |
| 2021 | 1.3 ppb |
| 2020 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 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. Western Water Company's 1.3 ppb sits at the 65th percentile in Ohio and the 61st nationally (higher means more lead).
Nearby utilities
14 other systems share Warren County; 9 of them have a higher latest lead result than Western Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Warren County | 99,000 | 1.4 ppb |
| Lebanon City | 20,700 | 1.2 ppb |
| Springboro Pws | 19,263 | 4.4 ppb |
| Franklin Public Water System | 11,690 | 2.1 ppb |
| South Lebanon City Pws | 7,792 | 0 (not detected) |
| Waynesville Village Pws | 4,100 | 1.6 ppb |
| Lebanon Correctional Institution | 3,410 | 4.4 ppb |
| Morrow Village Pws | 3,360 | 1.9 ppb |
| Carlisle City Pws | 1,675 | 1.7 ppb |
| Otterbein-Lebanon Retreat Center | 1,541 | 0.9 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Morrow, 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 Western Water Company 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. Systems that went over once often dip back under; here is what that means.