Hamilton County, Indiana
17 ZIP codes · Avg score 65/100 · Grade C · Updated
ZipCheckup grade for Hamilton County: C.
A mixed picture - some signals here are worth your attention.
Current EPA records place Hamilton County in the middle tier for drinking water safety, with 17 ZIP codes showing a range of outcomes.
How Hamilton County Compares
How Hamilton County Compares
Hamilton County scores 1 points above the Indiana state average (64/100) and 8 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Hamilton County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.9 (asthma 10.2%, diabetes 9.6%)
Estimated additional annual cost per homeowner: $973, driven primarily by flood
35.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Hamilton County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 11 violations. Past 5 years: 29 total (29 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $973
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
137,852 housing units in Hamilton 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 Hamilton County
Remediation costs are relatively manageable for most homeowners in Hamilton 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 Hamilton County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Hamilton County
8 community water systems serving Hamilton County.
- C
- C
- C
- C
- C
- C
Show all 8 water systems
- C
- C
11 total water systems serve Hamilton County.
Systems with the most violations in Hamilton County
4 water systems with recorded EPA violations.
- C
- C
- C
- C
All ZIP Codes in Hamilton County
17 ZIP codes tracked in Hamilton County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 46038 | Fishers | 67 | C | 0 | $302K |
| 2 | 46037 | Fishers | 66 | C | 1 | $403K |
| 3 | 46040 | Fortville | 66 | C | 1 | $434K |
| 4 | 46060 | Noblesville | 66 | C | 1 | $292K |
| 5 | 46069 | Sheridan | 66 | C | 1 | $243K |
| 6 | 46032 | Carmel | 65 | C | 4 (2 health) | $464K |
| 7 | 46033 | Carmel | 65 | C | 4 (2 health) | $459K |
| 8 | 46074 | Westfield | 65 | C | 4 (2 health) | $400K |
| 9 | 46280 | Indianapolis | 65 | C | 4 (2 health) | $291K |
| 10 | 46034 | Cicero | 60 | C | 8 (5 health) | $293K |
| 11 | 46062 | Noblesville | 60 | C | 8 (5 health) | $351K |
| 12 | 46030 | Arcadia | — | — | 8 (5 health) | $226K |
| 13 | 46031 | Atlanta | — | — | 0 | $178K |
| 14 | 46061 | Noblesville | — | — | — | |
| 15 | 46082 | Carmel | — | — | — | |
| 16 | 46085 | Fishers | — | — | — | |
| 17 | 46290 | Indianapolis | — | — | 4 (2 health) | $638K |
Recommended Buyer Guides for Hamilton County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- 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 Hamilton County, Indiana
Overview
Hamilton County in Indiana covers 17 tracked ZIP records with an average Home Safety Score of C (65/100) across 11 scored records.
12 of 14 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 7 health-based violations appear in the available health breakdown.
← Back to Indiana Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.