Pennsylvania
Westmoreland County drinking water quality
82 active public water systems serve 262,778 people in Westmoreland County. 14 are compliant, 68 had at least one EPA violation in the past three years, 3 are designated serious violators, and 3 carry a health flag.
Needs attention
Community water systems
17 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mawc Sweeney Plant |
143,000 | 2 | 0 | |
|
New Kensington Muni Auth |
47,800 | 0 | 0 | |
|
Latrobe Muni Auth |
30,000 | 2 | 0 | |
|
Highridge Water Auth |
16,000 | 5 | 0 | |
|
Derry Boro Muni Auth |
6,500 | 3 | 0 | |
|
Ligonier Twp Muni Auth |
3,293 | 8 | 0 | |
|
Mawc Furnace Run |
3,100 | 1 | 0 | |
|
Youngstown Boro Muni Auth |
2,730 | 1 | 0 | |
|
Torrance State Hospital |
997 | 3 | 0 | |
|
Waterford Waterworks |
389 | 8 | 0 | |
|
Meadows Mobile Home Park |
250 | 6 | 3 | |
|
Laurel Mountain Borough |
110 | 3 | 0 | |
|
Stanton Hills Community |
100 | 6 | 1 | |
|
Fairfield Manor MHP |
92 | 7 | 2 | |
|
Sun Dial Village MHP |
90 | 5 | 1 | |
|
Pine Garden Apartments |
40 | 9 | 2 | |
|
Little Acres MHP |
30 | 6 | 2 |
Non-community systems (65: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (354, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Pennsylvania records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.