Clark County, Indiana
22 ZIP codes · Avg score 52/100 · Grade D · Updated 2026-06-03
Unlike better-scoring counties, Clark County records health-based violations across a meaningful portion of its 22 ZIP codes — the overall safety grade is well below average.
How Clark County Compares
How Clark County Compares
Clark County scores 8 points below the Indiana state average (60/100) and 16 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Clark County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.4 (asthma 11.3%, diabetes 12.7%)
Estimated additional annual cost per homeowner: $801, driven primarily by flood
Infrastructure: 0.35% avg pipe failure probability, 19% of ZIPs at high risk
51.4% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Clark County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 24 violations. Past 5 years: 69 total (69 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $801
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
78,800 housing units in Clark 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 Clark County
Remediation costs are relatively manageable for most homeowners in Clark 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 Clark 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 Clark County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Indiana American Water - S. Indiana | 104,445 | 433 |
| 2 | Watson Rural Water Company | 15,750 | 429 |
| 3 | Sellersburg Water Department | 15,655 | 429 |
| 4 | Sunflower Valley Water Company, Inc. | 75 | 429 |
| 5 | Lake View Mobile Home Park | 90 | 400 |
16 total water systems serve Clark County.
All ZIP Codes in Clark County
22 ZIP codes tracked in Clark County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 47141 | Marysville | 66 | C | 0 | $198K |
| 2 | 47126 | Henryville | 64 | C | 3 (1 health) | $261K |
| 3 | 47106 | Borden | 63 | C | 4 (4 health) | $205K |
| 4 | 47172 | Sellersburg | 60 | C | 29 (2 health) | $249K |
| 5 | 47111 | Charlestown | 55 | C | 0 | $262K |
| 6 | 47131 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 7 | 47132 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 8 | 47133 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 9 | 47134 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 10 | 47144 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 11 | 47190 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 12 | 47199 | Jeffersonville | 55 | C | 50 (6 health) | — |
| 13 | 47138 | Lexington | 53 | D | 0 | $181K |
| 14 | 47143 | Memphis | 53 | D | 0 | $248K |
| 15 | 47163 | Otisco | 53 | D | 0 | $183K |
| 16 | 47130 | Jeffersonville | 46 | D | 50 (6 health) | $204K |
| 17 | 47104 | Bethlehem | 40 | D | 0 | — |
| 18 | 47129 | Clarksville | 40 | D | 0 | $163K |
| 19 | 47147 | Nabb | 40 | D | 0 | $228K |
| 20 | 47151 | New Albany | 40 | D | 0 | — |
| 21 | 47177 | Underwood | 40 | D | 0 | $178K |
| 22 | 47150 | New Albany | 35 | F | 0 | $192K |
Recommended Buyer Guides for Clark County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 51.4% 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 Clark County, Indiana
Overview
Clark County in Indiana covers 22 ZIP codes with an average Home Safety Score of D (52/100).
11 of 22 ZIP codes have recorded EPA violations. 55 health-based violations have been documented.
← Back to Indiana 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
Clark 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
51.4% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.