Westmoreland County, PA · PWSID PA5650032
Mawc Sweeney Plant lead service lines
2,680 lead or galvanized lines to replace
Mawc Sweeney Plant reported 2,408 lead and 272 galvanized-requiring-replacement service lines out of 64,985 in its inventory. That's about 1 in 24 lines. Another 1,911 (2.9%) are still listed as unknown material.
Ranks #9 of 399 Pennsylvania systems with confirmed lead lines, and #180 nationally.
4.1% of Mawc Sweeney Plant's service lines are lead or galvanized requiring replacement. That's 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%
Total service lines reported: 64,985. Reported all required service line types. Population served: 143,000; 60,233 connections.
Lead test results
Mawc Sweeney Plant's most recent 90th-percentile lead result (Jun 2025–Sep 2025) was 3.5 ppb, below both the 15 ppb action level and the 10 ppb level that takes effect in 2027. This means 90% of homes sampled were at or below that level; individual homes, especially those with lead lines, can be higher.
Lead and Copper Rule 90th-percentile results reported to EPA, in parts per billion. Dashed lines: 15 ppb action level and the 10 ppb level from November 1, 2027.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 2,680 in 2025 Q1 to 2,680 in 2026 Q3: no change. Lines of unknown material went from 1,911 to 1,911, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists no Lead and Copper Rule violations for Mawc Sweeney Plant since 2015. That covers testing, reporting, corrosion control and public notice requirements; it isn't a guarantee about any individual home.
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
Mawc Sweeney Plant's main water source is surface water (rivers, lakes or reservoirs). It sells water to 5 other water systems: Monroeville Municipal Auth, Plum Boro Muni Auth, Gilpin TWP Muni Auth, Parks TWP Muni Auth, Laurel Mountain Borough.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line 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 it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in Westmoreland County
Cities served
- Lead pipes in Murrysville
- Lead pipes in Greensburg
- Lead pipes in Jeannette
- Lead pipes in Vandergrift
- Lead pipes in Irwin
- Lead pipes in Manor
- Lead pipes in Delmont
- Lead pipes in Southwest Greensburg
- Lead pipes in Leechburg
- Lead pipes in East McKeesport
- Lead pipes in Wilmerding
- Lead pipes in Apollo
- Lead pipes in West Leechburg
- Lead pipes in North Apollo
ZIP codes served
ZIP codes whose center falls inside Mawc Sweeney Plant's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
1503515085151481560115613156151561915623156241562615629156321563315634156351563615641156441564715656156621566515668156731567515680156811568415692
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| New Kensington Muni Auth | 0 | 14,078 |
| Latrobe Muni Auth | 318 | 1,358 |
| Highridge Water Auth | 0 | 281 |
| Derry Boro Muni Auth | 52 | 1,988 |
| Ligonier TWP Muni Auth | 0 | 1,697 |
| Mawc Furnace Run | 18 | 1,362 |
| Youngstown Boro Muni Auth | 0 | 193 |
| Stanton Hills Community | 0 | 26 |
Check another water system
Questions
Does Mawc Sweeney Plant have lead pipes?
Yes. Mawc Sweeney Plant reported 2,408 lead service lines and 272 galvanized lines that must be replaced, out of 64,985 total. 1,911 more are of unknown material.
How do I check if my home's service line is lead?
Look up your address on Mawc Sweeney Plant's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will Mawc Sweeney Plant replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has Mawc Sweeney Plant had lead violations?
EPA's data shows no Lead and Copper Rule violations since 2015 for Mawc Sweeney Plant.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "Mawc Sweeney Plant lead service lines," https://leadpipemap.com/pa/mawc-sweeney-plant/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.