Pennsylvania · population 2,621
Lead pipes in Delmont, PA
2,680 lead or galvanized lines to replace
Most of Delmont (population 2,621) gets its water from Mawc Sweeney Plant. That system reported 2,408 lead and 272 galvanized-requiring-replacement service lines out of 64,985, with 1,911 more of unknown material.
4.1% of Mawc Sweeney Plant's service lines are lead or galvanized requiring replacement, higher than the Pennsylvania average (2.9%) and higher than the national average (3.1%).
- Lead 3.7%
- Galvanized (replace) 0.4%
- Unknown 2.9%
- Non-lead 93%
Latest lead test for Mawc Sweeney Plant (Jun 2025–Sep 2025): 3.5 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.
Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Mawc Sweeney Plant.
Water systems serving Delmont
| Water system | Lead | Galv. | Unknown | % lead |
|---|---|---|---|---|
| Mawc Sweeney PlantMain system | 2,408 | 272 | 1,911 | 4.1% |
Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.
Check your address in Delmont
The counts above cover the whole water system. To see whether your line is lead, look up your address on Mawc Sweeney Plant's official inventory. Utilities had to make these public by October 16, 2024.
No map yet? Do the 2-minute scratch and magnet test.
Protect your drinking water
If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.
Choosing a lead-certified filter · Testing your water · Replacement cost
Nearby cities
- Murrysville2,680 lead + galv. lines
- Jeannette2,680 lead + galv. lines
- Manor2,680 lead + galv. lines
- Greensburg2,680 lead + galv. lines
- Southwest Greensburg2,680 lead + galv. lines
- Irwin2,680 lead + galv. lines
- South Greensburg249 lead + galv. lines
- Trafford3,838 lead + galv. lines
Check another water system
Questions
Does Delmont, PA have lead pipes?
Yes. Mawc Sweeney Plant, which serves Delmont, reported 2,408 lead and 272 galvanized-requiring-replacement service lines, plus 1,911 of unknown material.
Who supplies water to Delmont?
EPA's service area maps place most of Delmont in Mawc Sweeney Plant's service area (PWSID PA5650032).
How do I check whether my Delmont home has a lead service line?
Search your address on Mawc Sweeney Plant's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.
When will lead pipes in Delmont be replaced?
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Mawc Sweeney Plant whether your street is scheduled and whether it covers the private side.