Dover Twp Water Sys, PA
Lead detected, under the action levels
Latest 90th-percentile lead: 4.9 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 Dover Twp Water Sys
Dover Twp Water Sys serves about 21,097 people through 5,966 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in York County, Pennsylvania. EPA system ID: PA7670073; phone on file: 717-292-3634. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Dover Twp Water Sys is 5 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.9 ppb |
| 2022 | 4 ppb |
| 2019 | 0 (not detected) |
| 2016 | 5 ppb |
Against other Pennsylvania systems
Of the 516 Pennsylvania systems with a lead result, the median latest reading is 2 ppb; 143 are over 15 ppb right now and 156 have gone over at some point. Dover Twp Water Sys's 4.9 ppb sits at the 67th percentile in Pennsylvania and the 90th nationally (higher means more lead).
Neighbouring systems
43 other systems share York County; 2 of them have a higher latest lead result than Dover Twp Water Sys. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| York Water Co | 206,762 | 3 ppb |
| Hanover Muni Water Works | 40,900 | 2 ppb |
| Red Lion Municipal Authority | 15,882 | 1 ppb |
| Dallastown Yoe Water Auth | 12,300 | 0 (not detected) |
| West Manchester Twp Auth | 9,960 | 2 ppb |
| Dillsburg Area Authority | 8,962 | 0 (not detected) |
| Veolia Newberry System | 6,480 | 0 (not detected) |
| Stewartstown Boro Water Auth | 5,206 | 0 (not detected) |
| Shrewsbury Borough | 4,727 | 2 ppb |
| New Freedom Boro Water Auth | 4,464 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Dover, PA 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 Dover Twp Water Sys 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.