States › Pennsylvania › Westmoreland County

Westmoreland County, PA Water Quality

Water quality data for 13 public water systems serving Westmoreland County, Pennsylvania — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 13 water systems · 67 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Westmoreland County Earns a A

Westmoreland County: 67 communities across 13 water systems. 100.0% have no open violations.

  • Median lead where detected: 3.48 ppb
  • 43 communities with a lead detection, 24 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 3 with significant inspection deficiencies
  • 100.0% of communities have no open violations
3.48 ppb
Median Lead Level
County-wide, 90th percentile
13
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • New Kensington
    Not detected
    No federal limits exceeded on record
    A
  • Lower Burrell
    Not detected
    No federal limits exceeded on record
    A
  • Arnold
    Not detected
    No federal limits exceeded on record
    A
  • Derry
    1.04 ppb
    No federal limits exceeded on record
    A
  • Upper Burrell
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Monessen
    3.23 ppb
    1 significant inspection deficiency
    C
  • Fairfield
    6.40 ppb
    3 health-based violations since 2015
    B
  • St. Clair
    6.40 ppb
    3 health-based violations since 2015
    B
  • New Florence
    6.40 ppb
    3 health-based violations since 2015
    B
  • Bolivar
    6.40 ppb
    3 health-based violations since 2015
    B
County Lead Level — Median 3.48 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 3.48 ppb — 23.2% of the federal action level
Systems by Lead Level
Under 5 ppb
35
5 – 10 ppb
8
No Data
24

All Cities in Westmoreland County

Hempfield Not detected B
North Huntingdon Not detected B
Murrysville municipality 3.48 ppb A
Penn 3.48 ppb A
Greensburg 3.48 ppb A
New Kensington Not detected A
Lower Burrell Not detected A
Rostraver Not detected B
Unity Not detected B
Jeannette 3.48 ppb A
Mount Pleasant Not detected B
Latrobe 1.64 ppb A
East Huntingdon Not detected B
Monessen 3.23 ppb C
Salem 3.48 ppb A
Washington 3.48 ppb A
Sewickley Not detected B
Derry 1.64 ppb A
South Huntingdon Not detected B
Vandergrift 3.48 ppb A
Arnold Not detected A
Scottdale Not detected B
Allegheny 3.48 ppb A
Mount Pleasant Not detected B
Manor 3.48 ppb A
Ligonier 1.30 ppb B
Youngwood Not detected B
Irwin 3.48 ppb A
West Newton Not detected B
Derry 1.04 ppb A
Delmont 3.48 ppb A
New Stanton Not detected B
Trafford 9.78 ppb B
Southwest Greensburg 3.48 ppb A
Upper Burrell Not detected A
South Greensburg Not detected B
Bell 3.48 ppb A
North Belle Vernon 1.75 ppb A
Fairfield 6.40 ppb B
Ligonier 7.00 ppb B
Donegal 2.00 ppb A
St. Clair 6.40 ppb B
West Leechburg 3.48 ppb A
Loyalhanna 3.48 ppb A
Lynnwood-Pricedale 1.75 ppb A
Avonmore 3.48 ppb A
Export 3.48 ppb A
North Irwin 3.48 ppb A
Oklahoma 3.48 ppb A
New Florence 6.40 ppb B
East Vandergrift 3.48 ppb A
Sutersville Not detected B
Hyde Park 3.48 ppb A
New Alexandria 3.48 ppb A
Penn 3.48 ppb A
Bolivar 6.40 ppb B
Seward 6.40 ppb B
Madison Not detected B
Smithton Not detected B
Slickville 3.48 ppb A
Hunker Not detected B
Arona Not detected B
Youngstown Not detected B
Crabtree 3.48 ppb A
Laurel Mountain 7.00 ppb B
Adamsburg 3.48 ppb A
Donegal 2.00 ppb A
Showing 67 cities
No active violations Active violations

About Westmoreland County Drinking Water

Westmoreland County is served by 13 water systems covering 67 communities. No community here has an open violation on record.

Of the communities reporting lead results, 43 recorded a detection, with a median of 3.48 ppb — 23% of the federal action level. 24 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 3 of them.

Frequently Asked Questions

Is Westmoreland County tap water safe to drink?▼
No community in Westmoreland County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Westmoreland County?▼
Among communities with a detection the median is 3.48 ppb, 23% of the 15 ppb action level. 24 reported none detected and 0 reported no result.
How many water systems serve Westmoreland County?▼
13 community water systems serve 67 communities here.
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