Montgomery County, Indiana
16 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
For most households in Montgomery County, the 16 tracked ZIP codes show adequate but uneven water quality.
How Montgomery County Compares
How Montgomery County Compares
Montgomery County scores 1 points below the Indiana state average (60/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Montgomery County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.8 (asthma 11.1%, diabetes 13.5%)
Estimated additional annual cost per homeowner: $481, driven primarily by water_lead
Infrastructure: 0.389% avg pipe failure probability, 56% of ZIPs at high risk
77.2% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Montgomery County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 8 violations. Past 5 years: 9 total (9 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: $481
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,171 housing units in Montgomery 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 Montgomery County
Remediation costs are relatively manageable for most homeowners in Montgomery 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 Montgomery 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 Montgomery County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Indiana American Water - Crawfordsville | 15,930 | 46 |
| 2 | Country View Estates | 30 | 42 |
| 3 | Linden Water Department | 759 | 8 |
| 4 | Waynetown Water Works | 953 | 7 |
| 5 | New Market Water Works | 765 | 5 |
11 total water systems serve Montgomery County.
All ZIP Codes in Montgomery County
16 ZIP codes tracked in Montgomery County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 47940 | Darlington | 66 | C | 1 | $149K |
| 2 | 47934 | Crawfordsville | 65 | C | 6 (1 health) | — |
| 3 | 47935 | Crawfordsville | 65 | C | 6 (1 health) | — |
| 4 | 47936 | Crawfordsville | 65 | C | 6 (1 health) | — |
| 5 | 47937 | Crawfordsville | 65 | C | 6 (1 health) | — |
| 6 | 47938 | Crawfordsville | 65 | C | 6 (1 health) | — |
| 7 | 47939 | Crawfordsville | 65 | C | 6 (1 health) | — |
| 8 | 47954 | Ladoga | 65 | C | 3 | $179K |
| 9 | 47965 | New Market | 65 | C | 5 (1 health) | $152K |
| 10 | 47933 | Crawfordsville | 64 | C | 6 (1 health) | $176K |
| 11 | 47990 | Waynetown | 55 | C | 1 | $111K |
| 12 | 47994 | Wingate | 53 | D | 2 | $111K |
| 13 | 47967 | New Richmond | 51 | D | 2 | $120K |
| 14 | 47955 | Linden | 47 | D | 8 | $117K |
| 15 | 47916 | Alamo | 40 | D | 0 | $60K |
| 16 | 47968 | New Ross | 40 | D | 0 | $206K |
Recommended Buyer Guides for Montgomery County
Filtered against federal data, fitted to local risks.
- Best Lead Paint Test Kits — 77.2% 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
Deep Dive Reports
Detailed analysis for Montgomery County, Indiana
Overview
Montgomery County in Indiana covers 16 ZIP codes with an average Home Safety Score of C (59/100).
14 of 16 ZIP codes have recorded EPA violations. 8 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.