Madison County, Ohio
6 ZIP codes · Avg score 53/100 · Grade D · Updated
ZipCheckup grade for Madison County: D.
Several federal signals point to home-safety risks in this ZIP.
For households across Madison County's 6 ZIP codes, below-average water safety data and recurring health violations make local monitoring worthwhile - checking the specific system serving an address is the most actionable starting point.
How Madison County Compares
How Madison County Compares
Madison County scores 7 points below the Ohio state average (60/100) and 20 points below 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: Madison County, Ohio
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.8 (asthma 10.6%, diabetes 12.4%)
Estimated additional annual cost per homeowner: $1,283, driven primarily by energy_code_gap
70.7% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Madison County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 3 violations. Past 5 years: 4 total (4 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
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: $1,283
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
20,213 housing units in Madison 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 Madison County
Remediation costs are relatively manageable for most homeowners in Madison 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.
Health Outcomes vs National Average
CDC PLACES data for Madison County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Madison County
8 community water systems serving Madison County.
- D
- D
- D
- C
- D
- C
Show all 8 water systems
- D
- D
12 total water systems serve Madison County.
Systems with the most violations in Madison County
5 water systems with recorded EPA violations.
- D
- D
- C
- C
- D
All ZIP Codes in Madison County
6 ZIP codes tracked in Madison County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 43162 | West Jefferson | 62 | C | 8 (2 health) | $196K |
| 2 | 43143 | Mount Sterling | 58 | C | 11 (1 health) | $209K |
| 3 | 43140 | London | 50 | D | 23 (6 health) | $228K |
| 4 | 43064 | Plain City | 42 | D | 17 (1 health) | $419K |
| 5 | 43151 | Sedalia | — | — | $123K | |
| 6 | 43153 | South Solon | — | — | 3 | $185K |
Recommended Buyer Guides for Madison County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Lead Paint Test Kits — 70.7% 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
Deep Dive Reports
Detailed analysis for Madison County, Ohio
Overview
Madison County in Ohio covers 6 tracked ZIP records with an average Home Safety Score of D (53/100) across 4 scored records.
5 of 5 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 8 health-based violations appear in the available health breakdown.
← Back to Ohio 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.
What You Can Do
Madison 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
70.7% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.