Darke County, Ohio
11 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
Within Darke County, 11 tracked ZIP codes reveal moderate water quality — national standards are generally met, with some documented exceptions.
How Darke County Compares
How Darke County Compares
Darke County scores 1 points below the Ohio state average (60/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Darke County, Ohio
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15 (asthma 11%, diabetes 14.3%)
Estimated additional annual cost per homeowner: $1,279, driven primarily by energy_code_gap
Infrastructure: 0.439% avg pipe failure probability, 82% of ZIPs at high risk
80.6% of homes built before 1978 (lead paint era)
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: $1,279
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
21,053 housing units in Darke 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 Darke County
Remediation costs are relatively manageable for most homeowners in Darke 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 Darke 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 Darke County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Union City Village Public Water System | 1,650 | 3 |
| 2 | Arcanum Village Public Water System | 2,100 | 2 |
| 3 | Lewisburg Village Public Water System | 1,800 | 2 |
| 4 | Ansonia Village Public Water System | 1,174 | 1 |
| 5 | Greenville City Public Water System | 13,227 | 1 |
11 total water systems serve Darke County.
All ZIP Codes in Darke County
11 ZIP codes tracked in Darke County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 45380 | Versailles | 70 | B | 1 | $232K |
| 2 | 45304 | Arcanum | 69 | C | 2 (1 health) | $190K |
| 3 | 45303 | Ansonia | 68 | C | 1 | $125K |
| 4 | 45328 | Gettysburg | 66 | C | 0 | $106K |
| 5 | 45362 | Rossburg | 66 | C | 0 | $224K |
| 6 | 45846 | Fort Recovery | 65 | C | 0 | $250K |
| 7 | 45390 | Union City | 64 | C | 3 | $112K |
| 8 | 45331 | Greenville | 57 | C | 1 | $159K |
| 9 | 45332 | Hollansburg | 40 | D | 0 | $113K |
| 10 | 45352 | Palestine | 40 | D | 0 | $63K |
| 11 | 45358 | Pitsburg | 40 | D | 0 | $139K |
Recommended Buyer Guides for Darke County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 80.6% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Darke County, Ohio
Overview
Darke County in Ohio covers 11 ZIP codes with an average Home Safety Score of C (59/100).
5 of 11 ZIP codes have recorded EPA violations. 1 health-based violation 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.