Posey County, Indiana
5 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Compared to top-scoring counties, Posey County's 5 ZIP codes land in the middle tier — some meet standards cleanly, others carry documented violations, and the gap between the best and worst areas is wider than average.
How Posey County Compares
How Posey County Compares
Posey County scores 3 points above the Indiana state average (60/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Posey County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.5 (asthma 10.9%, diabetes 12.9%)
Estimated additional annual cost per homeowner: $1,304, driven primarily by flood
Infrastructure: 0.462% avg pipe failure probability, 80% of ZIPs at high risk
74.8% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Posey County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 4 violations. Past 5 years: 14 total (14 health-based). Health-based violations are declining versus the prior 2-year window.
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: $1,304
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
8,369 housing units in Posey 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 Posey County
Remediation costs are relatively manageable for most homeowners in Posey 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 Posey 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 Posey County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Poseyville Municipal Water Department | 1,400 | 13 |
| 2 | NEW HARMONY WATER UTILITY | 1,633 | 3 |
| 3 | Mount Vernon Water Works | 6,426 | 3 |
| 4 | Owensville Water Works | 2,148 | 0 |
| 5 | Haubstadt Water Department | 1,600 | 0 |
6 total water systems serve Posey County.
All ZIP Codes in Posey County
5 ZIP codes tracked in Posey County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 47631 | New Harmony | 79 | B | 3 | $184K |
| 2 | 47612 | Cynthiana | 72 | B | 0 | $112K |
| 3 | 47620 | Mount Vernon | 70 | B | 3 | $216K |
| 4 | 47616 | Griffin | 55 | C | 0 | $78K |
| 5 | 47633 | Poseyville | 40 | D | 13 (10 health) | $136K |
Recommended Buyer Guides for Posey County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 74.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Posey County, Indiana
Overview
Posey County in Indiana covers 5 ZIP codes with an average Home Safety Score of C (63/100).
3 of 5 ZIP codes have recorded EPA violations. 10 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.