Williamstown Water Dept, WV
Lead detected, under the action levels
Latest 90th-percentile lead: 3.1 ppb (monitoring period 2026-2026). 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.
Who runs the water here
Williamstown Water Dept serves about 3,469 people through 1,567 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Wood County, West Virginia. EPA system ID: WV3305412; phone on file: 304-375-7761. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Williamstown Water Dept's lead record
Against the period ending 2022 (3.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Williamstown Water Dept is 6.5 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3.1 ppb |
| 2022 | 3.4 ppb |
| 2021 | 3.4 ppb |
| 2019 | 5.7 ppb |
| 2018 | 5.7 ppb |
| 2016 | 6.5 ppb |
Where this result ranks
Of the 408 West Virginia systems with a lead result, the median latest reading is 0.9 ppb; 4 are over 15 ppb right now and 20 have gone over at some point. Williamstown Water Dept's 3.1 ppb sits at the 86th percentile in West Virginia and the 83rd nationally (higher means more lead).
Other water systems in Wood County
7 other systems share Wood County; 1 of them has a higher latest lead result than Williamstown Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Parkersburg Utility Board | 34,251 | 0.44 ppb |
| Vienna | 12,507 | 11 ppb |
| Lubeck Psd | 11,724 | 0.95 ppb |
| Claywood Park Psd | 8,141 | 1.2 ppb |
| Union Williams P S D | 7,883 | 0.65 ppb |
| Mineral Wells Psd | 5,674 | 1.8 ppb |
| Central Boaz Psd | 1,628 | 2.6 ppb |
Next steps for Williamstown, WV
Test your own tap with a certified lab first-draw sample; Williamstown, WV 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 Williamstown Water Dept 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. Size matters more than most people expect: small vs large water systems.