Marion County, Kentucky
7 ZIP codes · Avg score 46/100 · Grade D · Updated 2026-06-03
Unlike better-scoring counties, Marion County records health-based violations across a meaningful portion of its 7 ZIP codes — the overall safety grade is well below average.
How Marion County Compares
How Marion County Compares
Marion 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: Marion 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: $389, driven primarily by energy_code_gap
Infrastructure: 0.308% avg pipe failure probability
48.6% of homes built before 1978 (lead paint era)
Violation History (2021–2023)
→ Stable trendEPA violation counts by year across Marion County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 3 total (3 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: $389
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,752 housing units in Marion 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 Marion County
Remediation costs are relatively manageable for most homeowners in Marion 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 Marion County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | MARION COUNTY WATER DISTRICT | 16,311 | 1 |
| 2 | Lebanon Water Works Company Inc. | 7,642 | 1 |
| 3 | Campbellsville Municipal Water | 24,874 | 0 |
| 4 | Bardstown Municipal Water Department | 31,185 | 0 |
| 5 | Bloomfield Water & Sewer Department | 5,771 | 0 |
All ZIP Codes in Marion County
7 ZIP codes tracked in Marion County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 40033 | Lebanon | 69 | C | 1 (1 health) | $160K |
| 2 | 40009 | Bradfordsville | 53 | D | 0 | $58K |
| 3 | 40037 | Loretto | 40 | D | 0 | $212K |
| 4 | 40049 | Nerinx | 40 | D | 0 | — |
| 5 | 40060 | Raywick | 40 | D | 0 | $164K |
| 6 | 40062 | Saint Francis | 40 | D | 0 | $113K |
| 7 | 40063 | Saint Mary | 40 | D | 0 | — |
Recommended Buyer Guides for Marion County
Independent picks. EPA-grounded. Matched here.
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Marion County, Kentucky
Overview
Marion County in Kentucky covers 7 ZIP codes with an average Home Safety Score of D (46/100).
1 of 7 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← 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
Marion 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
48.6% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.