Westmoreland County, Pennsylvania
23 ZIP codes · Avg score 52/100 · Grade D · Updated 2026-06-04
Drinking water quality in Westmoreland County has lagged behind state benchmarks — multiple documented violations across 23 ZIP codes keep the county's grade low.
How Westmoreland County Compares
How Westmoreland County Compares
Westmoreland County scores 3 points below the Pennsylvania state average (55/100) and 16 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Westmoreland County, Pennsylvania
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $1,526, driven primarily by flood
Infrastructure: 0.497% avg pipe failure probability, 91% of ZIPs at high risk
84.5% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Westmoreland County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 32 violations. Past 5 years: 40 total (40 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,526
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
70,802 housing units in Westmoreland County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Westmoreland County
Remediation costs are relatively manageable for most homeowners in Westmoreland County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Water Systems with Most Violations
Top 5 systems in Westmoreland County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mawc Yough Plant | 133,000 | 71 |
| 2 | Mawc Furnace Run | 3,100 | 62 |
| 3 | Mawc Sweeney Plant | 143,000 | 60 |
| 4 | West Cnty Muni Authority-mckeesport | 32,644 | 45 |
| 5 | Pine Garden Apartments | 40 | 45 |
17 total water systems serve Westmoreland County.
All ZIP Codes in Westmoreland County
23 ZIP codes tracked in Westmoreland County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 15605 | Greensburg | 64 | C | 15 (2 health) | — |
| 2 | 15606 | Greensburg | 64 | C | 15 (2 health) | — |
| 3 | 15696 | Youngstown | 59 | C | 4 | $122K |
| 4 | 15601 | Greensburg | 58 | C | 15 (2 health) | $209K |
| 5 | 15650 | Latrobe | 58 | C | 7 (2 health) | $176K |
| 6 | 15627 | Derry | 57 | C | 8 | $150K |
| 7 | 15069 | New Kensington | 55 | C | 0 | — |
| 8 | 15620 | Bradenville | 53 | D | 0 | $133K |
| 9 | 15655 | Laughlintown | 53 | D | 0 | $146K |
| 10 | 15661 | Loyalhanna | 53 | D | 0 | $144K |
| 11 | 15676 | Pleasant Unity | 53 | D | 0 | $274K |
| 12 | 15677 | Rector | 53 | D | 0 | $224K |
| 13 | 15693 | Whitney | 53 | D | 0 | $105K |
| 14 | 15923 | Bolivar | 53 | D | 0 | $94K |
| 15 | 15944 | New Florence | 53 | D | 0 | $160K |
| 16 | 15949 | Robinson | 53 | D | 0 | $75K |
| 17 | 15068 | New Kensington | 52 | D | 0 | $166K |
| 18 | 15697 | Youngwood | 51 | D | 13 | $159K |
| 19 | 15779 | Torrance | 50 | D | 5 | $177K |
| 20 | 15663 | Madison | 49 | D | 6 | $215K |
| 21 | 15638 | Hostetter | 40 | D | 0 | — |
| 22 | 15671 | New Derry | 40 | D | 0 | — |
| 23 | 15658 | Ligonier | 33 | F | 17 | $235K |
Recommended Buyer Guides for Westmoreland County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 84.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Westmoreland County, Pennsylvania
Overview
Westmoreland County in Pennsylvania covers 23 ZIP codes with an average Home Safety Score of D (52/100).
10 of 23 ZIP codes have recorded EPA violations. 8 health-based violations have been documented.
← Back to Pennsylvania water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Westmoreland County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
84.5% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.