Mercer County, Pennsylvania
19 ZIP codes · Avg score 79/100 · Grade B · Updated
ZipCheckup grade for Mercer County: B.
This ZIP looks solid, with a few items worth a quick check.
For households in Mercer County, the 19 ZIP codes on record show consistently safe tap water.
How Mercer County Compares
How Mercer County Compares
Mercer County scores 22 points above the Pennsylvania state average (57/100) and 6 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Mercer 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: $1,623, driven primarily by energy_code_gap
75.5% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Mercer County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 10 violations. Past 5 years: 16 total (16 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,623
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
43,678 housing units in Mercer 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 Mercer County
Remediation costs are relatively manageable for most homeowners in Mercer 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 serving Mercer County
8 community water systems serving Mercer County.
- B
- B
- C
- B
- B
- B
Show all 8 water systems
- B
- C
12 total water systems serve Mercer County.
Systems with the most violations in Mercer County
5 water systems with recorded EPA violations.
- C
- C
- B
All ZIP Codes in Mercer County
19 ZIP codes tracked in Mercer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 16121 | Farrell | 82 | B | 5 | $77K |
| 2 | 16159 | West Middlesex | 82 | B | 5 | $170K |
| 3 | 16161 | Wheatland | 82 | B | 5 | $65K |
| 4 | 16137 | Mercer | 81 | B | 6 | $177K |
| 5 | 16148 | Hermitage | 81 | B | 7 | $186K |
| 6 | 16150 | Sharpsville | 81 | B | 8 | $136K |
| 7 | 16142 | New Wilmington | 80 | B | 9 | $214K |
| 8 | 16127 | Grove City | 73 | B | 28 | $200K |
| 9 | 16125 | Greenville | 67 | C | 49 (7 health) | $126K |
| 10 | 16113 | Clark | — | — | $214K | |
| 11 | 16114 | Clarks Mills | — | — | $169K | |
| 12 | 16124 | Fredonia | — | — | $165K | |
| 13 | 16130 | Hadley | — | — | $152K | |
| 14 | 16133 | Jackson Center | — | — | 1 | $181K |
| 15 | 16145 | Sandy Lake | — | — | 36 | $168K |
| 16 | 16151 | Sheakleyville | — | — | $91K | |
| 17 | 16153 | Stoneboro | — | — | 37 | $149K |
| 18 | 16154 | Transfer | — | — | 24 (6 health) | $167K |
| 19 | 16311 | Carlton | — | — | $115K |
Recommended Buyer Guides for Mercer County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 75.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Mercer County, Pennsylvania
Overview
Mercer County in Pennsylvania covers 19 tracked ZIP records with an average Home Safety Score of B (79/100) across 9 scored records.
13 of 13 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 7 health-based violations appear in the available health breakdown.
← Back to Pennsylvania Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.