COUNTY REPORT PA

Mercer County, Pennsylvania

19 ZIP codes · Avg score 79/100 · Grade B

ZipCheckup grade for Mercer County: B.

This ZIP has a few items worth a quick check.

A high composite grade for Mercer County is a summary of data, not a water test, so check the report for your own ZIP code among the 19 listed.

How Mercer County Compares

Mercer County79/100
Pennsylvania avg57/100
National avg73/100

How Mercer County Compares

B
County Grade
79/100
Avg Safety Score
19
ZIP Codes
12
Water Systems

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

B
County Grade
79
Avg Safety Score
19
ZIP Codes
Best ZIP: 16121 (82/100)
Lowest ZIP: 16125 (67/100)
$167K
Median Home Value
$578
Avg Remediation (0.35% of home value)

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.

A B C D F

Key Risk Factors

Modeled additional annual cost estimate per homeowner: $1,056, largest modeled factor: Energy Code Gap

69% of homes built before 1980 (lead paint was banned for residential use in 1978)

Infrastructure Overview

1965
Median Build Year
69%
Pre-1980 Housing
54/100
Infrastructure Stress Indicator
100%
ZIPs with High Infrastructure Stress
High
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $1,056

Energy Code Gap $540/yr
Flood $511/yr
Sea Level Rise $211/yr

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

Pre-1940 20%
1940–1959 22%
1960–1979 27%
1980–1999 21%
2000+ 11%

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

$167K
Median Home Value
$578
Est. Remediation Cost
0.3%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Mercer County can be compared with the median property value; actual costs vary by property.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Water systems mapped to Mercer County ZIP codes

8 community water systems mapped to Mercer County ZIP codes; EPA may list more systems serving the county.

Show all 8 water systems

12 water systems mapped to Mercer County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in Mercer County

5 water systems with violations in EPA records.

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

Each guide below is listed with the reason it appears.

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

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Mercer County?
Mercer County receives an average Home Safety grade of B from its scored ZIP records (19 ZIP codes tracked); this is a composite index, not a tap-water test.
How many water systems serve Mercer County?
We map 12 public water systems to 19 ZIP codes in our data for Mercer County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Mercer County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Mercer County is energy code gap. Across all modeled risk factors, the estimated average additional annual cost is $1,056 per homeowner; actual costs vary by home.
How old are homes in Mercer County?
The median home build year in Mercer County is 1965. 69% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Mercer County compare to Pennsylvania?
Mercer County has an average Home Safety Score of 79/100 under model 4.0.0, which is at or above the Pennsylvania state average of 57/100.

How to cite this page

APA ZipCheckup. (2026). Mercer County, PA: HSS 79/100; 7 Health Violations. https://zipcheckup.com/county/pennsylvania/mercer/
BibTeX
@misc{zipcheckup-county-pennsylvania-mercer,
  author = {{ZipCheckup}},
  title  = {{Mercer County, PA: HSS 79/100; 7 Health Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/pennsylvania/mercer/}
}

Page version: October 2026.

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