Custer County, Montana
4 ZIP codes · Avg score 65/100 · Grade C · Updated
ZipCheckup grade for Custer County: C.
A mixed picture - some signals here are worth your attention.
Within Custer County, safety data across 4 ZIP codes suggests a fair but uneven system - violations are present and worth checking at the ZIP level.
How Custer County Compares
How Custer County Compares
Custer County scores 0 points above the Montana state average (65/100) 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:
Key Risk Factors
Health risk index: 12.8 (asthma 11%, diabetes 10.5%)
Estimated additional annual cost per homeowner: $2,350, driven primarily by flood
71.8% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Custer County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 6 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
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: $2,350
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,900 housing units in Custer 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 Custer County
Remediation costs are relatively manageable for most homeowners in Custer 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 Custer County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Custer County
1 community water system serving Custer County.
- C
Systems with the most violations in Custer County
1 water system with recorded EPA violations.
- C
All ZIP Codes in Custer County
4 ZIP codes tracked in Custer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59301 | Miles City | 65 | C | 6 (3 health) | $202K |
| 2 | 59336 | Ismay | — | — | $277K | |
| 3 | 59338 | Kinsey | — | — | $276K | |
| 4 | 59351 | Volborg | — | — | $113K |
Recommended Buyer Guides for Custer County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 71.8% 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
- 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 Custer County, Montana
Overview
Custer County in Montana covers 4 tracked ZIP records with an average Home Safety Score of C (65/100) across 1 scored records.
1 of 1 ZIP code with a reported violation count in the available EPA record have recorded EPA violations. 3 health-based violations appear in the available health breakdown.
← Back to Montana 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.