Richland County, Ohio
17 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Richland County: 17 ZIP codes, mid-range safety grade.
How Richland County Compares
How Richland County Compares
Richland County scores 0 points above the Ohio state average (60/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Richland County, Ohio
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.9 (asthma 11%, diabetes 14.3%)
Estimated additional annual cost per homeowner: $1,748, driven primarily by flood
Infrastructure: 0.418% avg pipe failure probability, 67% of ZIPs at high risk
76.8% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Richland County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 24 violations. Past 5 years: 45 total (45 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.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
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: $1,748
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
68,698 housing units in Richland 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 Richland County
Remediation costs are relatively manageable for most homeowners in Richland 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 Richland County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Richland County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mansfield City | 51,000 | 56 |
| 2 | Madison Water District | 2,050 | 56 |
| 3 | Walnut Hills Water Association | 583 | 56 |
| 4 | Expressview Commission Water Association | 300 | 56 |
| 5 | Shelly Acres Water Association | 254 | 56 |
25 total water systems serve Richland County.
All ZIP Codes in Richland County
17 ZIP codes tracked in Richland County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 44878 | Shiloh | 70 | B | 0 | $182K |
| 2 | 44843 | Lucas | 68 | C | 1 | $201K |
| 3 | 44862 | Ontario | 66 | C | 0 | — |
| 4 | 44901 | Mansfield | 66 | C | 7 (4 health) | — |
| 5 | 44904 | Mansfield | 66 | C | 7 (4 health) | $197K |
| 6 | 44906 | Mansfield | 66 | C | 7 (4 health) | $128K |
| 7 | 44907 | Mansfield | 66 | C | 7 (4 health) | $130K |
| 8 | 44822 | Butler | 65 | C | 1 | $215K |
| 9 | 44902 | Mansfield | 61 | C | 7 (4 health) | $59K |
| 10 | 44903 | Mansfield | 61 | C | 7 (4 health) | $178K |
| 11 | 44905 | Mansfield | 61 | C | 7 (4 health) | $111K |
| 12 | 44999 | Mansfield | 61 | C | 7 (4 health) | — |
| 13 | 44875 | Shelby | 60 | C | 0 | $147K |
| 14 | 44813 | Bellville | 58 | C | 2 | $210K |
| 15 | 43349 | Shauck | 40 | D | 0 | — |
| 16 | 44133 | North Royalton | 40 | D | 0 | $276K |
| 17 | 44850 | New Haven | 40 | D | 0 | — |
Recommended Buyer Guides for Richland County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 76.8% 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 Richland County, Ohio
Overview
Richland County in Ohio covers 17 ZIP codes with an average Home Safety Score of C (60/100).
11 of 17 ZIP codes have recorded EPA violations. 32 health-based violations have been documented.
← Back to Ohio 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.