Boone County, Indiana
7 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Within Boone County, 7 tracked ZIP codes reveal moderate water quality — national standards are generally met, with some documented exceptions.
How Boone County Compares
How Boone County Compares
Boone 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: Boone County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 10.4%, diabetes 10.5%)
Estimated additional annual cost per homeowner: $979, driven primarily by flood
Infrastructure: 0.36% avg pipe failure probability, 43% of ZIPs at high risk
57.4% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Boone County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 2 violations. Past 5 years: 7 total (7 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: $979
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
28,778 housing units in Boone 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 Boone County
Remediation costs are relatively manageable for most homeowners in Boone 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 Boone 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 Boone County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | CITIZENS WATER - INDIANAPOLIS | 880,345 | 4 |
| 2 | Whitestown South | 5,880 | 4 |
| 3 | Thorntown Utilities | 1,600 | 2 |
| 4 | Carmel Water Department | 99,927 | 2 |
| 5 | Citizens Water of Westfield, Llc | 61,493 | 2 |
12 total water systems serve Boone County.
All ZIP Codes in Boone County
7 ZIP codes tracked in Boone County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 46035 | Colfax | 70 | B | 0 | $132K |
| 2 | 46075 | Whitestown | 68 | C | 1 | $332K |
| 3 | 46071 | Thorntown | 66 | C | 2 | $228K |
| 4 | 46077 | Zionsville | 63 | C | 2 | $535K |
| 5 | 46147 | Jamestown | 62 | C | 0 | $213K |
| 6 | 46052 | Lebanon | 59 | C | 1 (1 health) | $200K |
| 7 | 46102 | Advance | 55 | C | 0 | $165K |
Recommended Buyer Guides for Boone County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Lead Paint Test Kits — 57.4% of homes built before 1978
- 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 Boone County, Indiana
Overview
Boone County in Indiana covers 7 ZIP codes with an average Home Safety Score of C (63/100).
4 of 7 ZIP codes have recorded EPA violations. 1 health-based violation 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.