Water quality in Derry, Pennsylvania
Derry is in Westmoreland County. 82 active public water systems serve the county; 68 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Westmoreland County
16 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Latrobe Muni Auth |
30,000 | 2 | 4.8 mi | |
| Youngstown Boro Muni Auth |
2,730 | 1 | 5.1 mi | |
| Sun Dial Village MHP |
90 | 5 | 6.3 mi | |
| Torrance State Hospital |
997 | 3 | 6.7 mi | |
| Ligonier Twp Muni Auth |
3,293 | 8 | 7.1 mi | |
| Fairfield Manor MHP |
92 | 7 | 8.1 mi | |
| Pine Garden Apartments |
40 | 9 | 9.0 mi | |
| Mawc Furnace Run |
3,100 | 1 | 9.5 mi | |
| Waterford Waterworks |
389 | 8 | 10.7 mi | |
| Little Acres MHP |
30 | 6 | 12.1 mi | |
| Highridge Water Auth |
16,000 | 5 | 12.4 mi | |
| Mawc Sweeney Plant |
143,000 | 2 | 16.0 mi | |
| Stanton Hills Community |
100 | 6 | 16.7 mi | |
| Meadows Mobile Home Park |
250 | 6 | 22.0 mi | |
| New Kensington Muni Auth |
47,800 | 0 | 26.2 mi | |
| Laurel Mountain Borough |
110 | 3 | — |
Non-community systems in Westmoreland County (65: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Westmoreland County, nearest to Derry first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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. Retrieved from ECHO on Oct 11, 2026.