Hart County, Kentucky
10 ZIP codes · Avg score 46/100 · Grade D · Updated 2026-06-03
Hart County ranks below average for water safety, with health-based violations recorded across multiple of its 10 ZIP codes.
How Hart County Compares
How Hart County Compares
Hart County scores 15 points below the Kentucky state average (61/100) and 22 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Hart County, Kentucky
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: $514, driven primarily by energy_code_gap
Infrastructure: 0.316% avg pipe failure probability
52.9% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Hart County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 24 violations. Past 5 years: 48 total (48 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $514
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,989 housing units in Hart 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 Hart County
Remediation costs are relatively manageable for most homeowners in Hart 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 with Most Violations
Top 5 systems in Hart County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | GREEN RIVER VALLEY WATER DISTRICT | 17,431 | 1 |
| 2 | Munfordville Water Department | 2,109 | 1 |
| 3 | Hardin County Water District #2 | 76,326 | 1 |
| 4 | EDMONSON CO WATER DISTRICT | 17,848 | 1 |
| 5 | Horse Cave Water System | 2,744 | 0 |
8 total water systems serve Hart County.
All ZIP Codes in Hart County
10 ZIP codes tracked in Hart County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 42749 | Horse Cave | 70 | B | 0 | $121K |
| 2 | 42757 | Magnolia | 53 | D | 0 | $122K |
| 3 | 42765 | Munfordville | 53 | D | 0 | $139K |
| 4 | 42784 | Upton | 53 | D | 0 | $156K |
| 5 | 42152 | Hiseville | 40 | D | 0 | — |
| 6 | 42722 | Canmer | 40 | D | 0 | — |
| 7 | 42729 | Cub Run | 40 | D | 0 | $156K |
| 8 | 42746 | Hardyville | 40 | D | 0 | $108K |
| 9 | 42776 | Sonora | 40 | D | 0 | $185K |
| 10 | 42713 | Bonnieville | 31 | F | 1 | $106K |
Recommended Buyer Guides for Hart County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 52.9% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Hart County, Kentucky
Overview
Hart County in Kentucky covers 10 ZIP codes with an average Home Safety Score of D (46/100).
1 of 10 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Kentucky 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.
What You Can Do
Hart 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
52.9% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.