Lead pipes in Chester County, Pennsylvania
How many lead pipes are in Chester County, PA?
Water systems based in Chester County reported 110 lead service lines, 1,013 galvanized lines that need replacing and 45,490 lines of unknown material to EPA (Q3 2026). West Grove Borough has the most, with 417 lead and galvanized lines.
Free replacement program confirmed
Who pays in Pennsylvania
Pennsylvania's Act 120 lets PUC-regulated water utilities replace customer-owned lead service lines and recover the cost through rates, and it prohibits partial replacement. The PUC's 2022 rules require utilities to file replacement programs; Aqua Pennsylvania's was approved in April 2025 for up to 1,500 customer lines a year. City systems such as Philadelphia and Pittsburgh set their own terms.
Confirmed programs in Chester County
- Coatesville (PA American Water): No direct cost to the customer.
Every Chester County water system with lead lines
Systems are grouped by the county EPA lists as their main service area. Some serve towns in neighboring counties too.
| Water system | Lead | Galv. | Unknown | Program |
|---|---|---|---|---|
| West Grove Borough West Grove Borough | 0 | 417 | 0 | Not confirmed |
| Coatesville (PA American Water) PA American Coatesville | 63 | 219 | 13,131 | Free, utility schedules |
| Oxford Borough Oxford Borough | 10 | 142 | 460 | Not confirmed |
| Royersford PA American Royersford | 6 | 115 | 17,136 | Not confirmed |
| Avondale Borough of Avondale | 0 | 67 | 0 | Not confirmed |
| West Chester Aqua PA West Chester | 12 | 27 | 2,617 | Not confirmed |
| Downingtown Downingtown Water Authority | 8 | 13 | 2,301 | Not confirmed |
| Atglen Borough of Atglen | 10 | 2 | 13 | Not confirmed |
| Honey Brook Boro Water Honey Brook Boro Water | 0 | 5 | 194 | Not confirmed |
| Uwchlan Aqua PA Uwchlan | 0 | 3 | 1,562 | Not confirmed |
| Friendship Aqua PA Friendship | 0 | 2 | 369 | Not confirmed |
| Kennett Square Mun Kennett Square Mun Water Works | 1 | 0 | 1,622 | Not confirmed |
| Longwood Gardens Longwood Gardens | 0 | 1 | 5 | Not confirmed |
| Phoenixville Phoenixville Water Dept | 0 | 0 | 6,080 | Not confirmed |
Common questions
How many lead pipes are in Chester County, PA?
Water systems based in Chester County reported 110 lead service lines, 1,013 galvanized lines that need replacing and 45,490 lines of unknown material to EPA (Q3 2026). West Grove Borough has the most, with 417 lead and galvanized lines.
Who pays to replace lead service lines in Chester County?
It depends on your water utility. Pennsylvania's Act 120 lets PUC-regulated water utilities replace customer-owned lead service lines and recover the cost through rates, and it prohibits partial replacement. We have confirmed programs for 1 Chester County utility, listed on this page.
How do I find out if my house has a lead service line?
Look up your address on your water utility's service line inventory map, or check the pipe where it enters your home: lead is dull gray, soft, scratches to shiny silver, and a magnet won't stick. See our step-by-step guide.
Other Pennsylvania counties
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