Lead pipes in Montgomery County, Pennsylvania
How many lead pipes are in Montgomery County, PA?
Water systems based in Montgomery County reported 134 lead service lines, 5,682 galvanized lines that need replacing and 112,310 lines of unknown material to EPA (Q3 2026). Montgomery County (Aqua PA) has the most, with 4,650 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 Montgomery County
- Montgomery County (Aqua PA): No direct cost, by phase.
- Norristown (PA American Water): No direct cost to the customer.
- Hatboro (Aqua PA): No direct cost, by phase.
Every Montgomery 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 |
|---|---|---|---|---|
| Montgomery County (Aqua PA) Aqua PA Main System | 55 | 4,595 | 39,217 | Free, utility schedules |
| Norristown (PA American Water) PA American Norristown | 43 | 374 | 30,340 | Free, utility schedules |
| Ambler Boro Ambler Boro Water Dept | 0 | 344 | 739 | Not confirmed |
| Hatboro (Aqua PA) Aqua PA Hatboro | 0 | 247 | 162 | Free, utility schedules |
| Schwenksville Borough Auth Schwenksville Borough Auth | 0 | 80 | 106 | Not confirmed |
| North Penn North Penn Water Authority | 34 | 26 | 0 | Not confirmed |
| North Wales North Wales Water Authority | 2 | 3 | 17,382 | Not confirmed |
| E Greenville Boro E Greenville Boro Water Dept | 0 | 4 | 723 | Not confirmed |
| Horsham Water&sewer Authority Horsham Water&sewer Authority | 0 | 4 | 6,567 | Not confirmed |
| Upper Providence Aqua PA Upper Providence | 0 | 3 | 189 | Not confirmed |
| Audubon PA American Audubon | 0 | 2 | 2,613 | Not confirmed |
| Collegeville Trappe Joint PWD Collegeville Trappe Joint PWD | 0 | 0 | 2,222 | Not confirmed |
| Pottstown Borough Water Auth Pottstown Borough Water Auth | 0 | 0 | 9,676 | Not confirmed |
| Telford Borough Authority Telford Borough Authority | 0 | 0 | 1,123 | Not confirmed |
| Red Hill Red Hill Water Authority | 0 | 0 | 1,251 | Not confirmed |
Common questions
How many lead pipes are in Montgomery County, PA?
Water systems based in Montgomery County reported 134 lead service lines, 5,682 galvanized lines that need replacing and 112,310 lines of unknown material to EPA (Q3 2026). Montgomery County (Aqua PA) has the most, with 4,650 lead and galvanized lines.
Who pays to replace lead service lines in Montgomery 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 3 Montgomery County utilities, 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
Allegheny CountyLehigh CountyBlair CountyCambria CountyWestmoreland CountyCumberland CountyNorthampton CountyVenango CountyErie CountyLycoming CountyBeaver CountyMercer CountyPennsylvania →