Sewickley Boro Water Auth, PA
Lead detected, under the action levels
Latest 90th-percentile lead: 5.49 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.
Sewickley Boro Water Auth at a glance
Sewickley Boro Water Auth serves about 6,800 people through 2,183 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 Allegheny County, Pennsylvania. EPA system ID: PA5020050; phone on file: 412-741-9180. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (5.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sewickley Boro Water Auth is 11.5 ppb across 5 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 5.49 ppb |
| 2022 | 5.4 ppb |
| 2020 | 11.5 ppb over 10 |
| 2019 | 3.53 ppb |
| 2016 | 8 ppb |
Where this result ranks
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. Sewickley Boro Water Auth's 5.49 ppb sits at the 68th percentile in Pennsylvania and the 92nd nationally (higher means more lead).
Nearby utilities
36 other systems share Allegheny County; 3 of them have a higher latest lead result than Sewickley Boro Water Auth. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pa Amer Water Co-Pittsburgh | 686,000 | 4 ppb |
| Pittsburgh Water & Sewer Auth | 520,000 | 2 ppb |
| West View Water Authority | 200,000 | 0 (not detected) |
| Wilkinsburg-Penn Jt Water Auth | 125,000 | 9.78 ppb |
| Hampton Shaler Water Authority | 61,949 | 1.26 ppb |
| Monroeville Municipal Auth | 48,500 | 1.5 ppb |
| Oakmont Water Authority | 39,901 | 0.46 ppb |
| Moon Twp Muni Auth | 38,000 | 1.87 ppb |
| West Cnty Muni Auth-Mckeesport | 32,644 | 0 (not detected) |
| Plum Boro Muni Auth | 27,500 | 3.7 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Sewickley, 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 Sewickley Boro Water Auth whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1461 ppb (copper action level 1,300 ppb).
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.