Westmoreland County Water Quality: 3 Cities Ranked by the Records
Westmoreland County, Pennsylvania: 3 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
LithiumDetected in 1 system of 3 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest23.6 µg/L
- NORTH PENN WATER AUTHORITY23.6 µg/LSample date: 2024-04-10 to 2025-01-14
- LATROBE MUNI AUTHNot detected · below 9.0 µg/L lab reporting limitSample date: 2024-01-10 to 2024-10-23
- MAWC SWEENEY PLANTNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-04-24 to 2024-01-03
Perfluorooctanoic acid (PFOA)Detected in 1 system of 3 tested4.0 ng/L federal MCL (2024) · US EPAHighest5.1 ng/L
- NORTH PENN WATER AUTHORITY5.1 ng/LSample date: 2024-04-10 to 2025-01-14
- LATROBE MUNI AUTHNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-01-10 to 2024-10-23
- MAWC SWEENEY PLANTNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-04-24 to 2024-01-03
Lead (90th percentile)Detected in 3 systems15 µg/L federal action level · US EPAHighest3.48 µg/L
- MAWC SWEENEY PLANT3.48 µg/LMonitoring period: 2025–2025
- LATROBE MUNI AUTH1.64 µg/LMonitoring period: 2025–2025
- NORTH PENN WATER AUTHORITY0.5 µg/LMonitoring period: 2025–2025
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 3 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest4 ng/L
- NORTH PENN WATER AUTHORITY4 ng/LSample date: 2024-04-10 to 2025-01-14
- LATROBE MUNI AUTHNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-10 to 2024-10-23
- MAWC SWEENEY PLANTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-24 to 2024-01-03
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 3 testedNo federal or state limit; shown for transparencyHighest3.4 ng/L
- NORTH PENN WATER AUTHORITY3.4 ng/LSample date: 2024-04-10 to 2025-01-14
- LATROBE MUNI AUTHNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-10 to 2024-10-23
- MAWC SWEENEY PLANTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-24 to 2024-01-03
26 PFAS tested, none detected in any systemShow
Tested in these 3 systems: LATROBE MUNI AUTH, MAWC SWEENEY PLANT, NORTH PENN WATER AUTHORITY
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 3 cities above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in PennsylvaniaLargest water systems
- MurrysvilleMAWC SWEENEY PLANT · PA5650032143,000 served
- PennNORTH PENN WATER AUTHORITY · PA146003491,941 served
- LatrobeLATROBE MUNI AUTH · PA565006030,000 served
Frequently asked
How does Westmoreland County tap water compare across cities?
PurityMap ranks 3 cities in Westmoreland County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Murrysville's main water system: MAWC SWEENEY PLANT · PWSID PA5650032 · Purity Score 94 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many Westmoreland County cities had a PFAS sample above a 2024 EPA limit?
1 of 3 Westmoreland County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Penn (PFOA 5.1 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 1.
Is there lead in Westmoreland County tap water?
Utilities report lead as a 90th-percentile result from home taps. 3 of 3 Westmoreland County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
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