Williamstown Municipal Water Dept, KY
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2023-2025). 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.
Williamstown Municipal Water Dept at a glance
Williamstown Municipal Water Dept serves about 5,495 people through 1,983 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 surface water, in Grant County, Kentucky. EPA system ID: KY0410472; phone on file: 859-466-5578. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 4 ppb from 7 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Williamstown Municipal Water Dept is 7 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2021 | 7 ppb |
| 2018 | 4 ppb |
Against other Kentucky systems
Of the 367 Kentucky systems with a lead result, the median latest reading is 0 ppb; 0 are over 15 ppb right now and 4 have gone over at some point. Williamstown Municipal Water Dept's 3 ppb sits at the 83rd percentile in Kentucky and the 83rd nationally (higher means more lead).
Nearby utilities
3 other systems share Grant County; 0 of them have a higher latest lead result than Williamstown Municipal Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bullock Pen Water District | 20,048 | 0.3 ppb |
| Corinth Water District | 3,139 | 0 (not detected) |
| Dry Ridge Water Works Commission | 2,400 | 0 (not detected) |
Next steps for Dry Ridge, KY
Test your own tap with a certified lab first-draw sample; Dry Ridge, KY 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 Municipal 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.