Dearborn County, Indiana
8 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-06-03
Across Dearborn County, EPA compliance data for 8 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Dearborn County Compares
How Dearborn County Compares
Dearborn County scores 9 points above the Indiana state average (60/100) and 1 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Dearborn County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.2 (asthma 11%, diabetes 12.7%)
Estimated additional annual cost per homeowner: $1,014, driven primarily by flood
Infrastructure: 0.369% avg pipe failure probability, 29% of ZIPs at high risk
60.9% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↓ Improving trendEPA violation counts by year across Dearborn County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 2 violations. Past 5 years: 6 total (6 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: $1,014
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
20,272 housing units in Dearborn 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 Dearborn County
Remediation costs are relatively manageable for most homeowners in Dearborn 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 Dearborn 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 Dearborn County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | L-m-s Conservancy District | 5,375 | 9 |
| 2 | Aurora Utilities | 6,415 | 8 |
| 3 | Hogan Water Corporation | 1,238 | 8 |
| 4 | Dillsboro Water Works | 2,000 | 8 |
| 5 | Aberdeen Pate Water Company, Inc. | 4,787 | 8 |
11 total water systems serve Dearborn County.
All ZIP Codes in Dearborn County
8 ZIP codes tracked in Dearborn County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 47018 | Dillsboro | 83 | B | 0 | $190K |
| 2 | 47025 | Lawrenceburg | 78 | B | 1 | $231K |
| 3 | 47060 | West Harrison | 78 | B | 0 | $278K |
| 4 | 47001 | Aurora | 71 | B | 8 (2 health) | $190K |
| 5 | 47016 | Cedar Grove | 63 | C | 0 | $223K |
| 6 | 47021 | Friendship | 63 | C | 0 | — |
| 7 | 47022 | Guilford | 63 | C | 0 | $292K |
| 8 | 47035 | New Trenton | 53 | D | 0 | $153K |
Recommended Buyer Guides for Dearborn 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 — 60.9% of homes built before 1978
- 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 Dearborn County, Indiana
Overview
Dearborn County in Indiana covers 8 ZIP codes with an average Home Safety Score of C (69/100).
2 of 8 ZIP codes have recorded EPA violations. 2 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.