Flathead County, Montana
18 ZIP codes · Avg score 53/100 · Grade D · Updated
ZipCheckup grade for Flathead County: D.
Several federal signals point to home-safety risks in this ZIP.
State safety rankings put Flathead County near the bottom - 18 ZIP codes, below-average compliance.
How Flathead County Compares
How Flathead County Compares
Flathead County scores 12 points below the Montana state average (65/100) and 20 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: Flathead County, Montana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.1 (asthma 10.7%, diabetes 9.3%)
Estimated additional annual cost per homeowner: $1,002, driven primarily by flood
47.6% of homes built before 1978 (lead paint era)
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: $1,002
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
52,269 housing units in Flathead 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 Flathead County
Remediation costs are relatively manageable for most homeowners in Flathead 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 Flathead County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Flathead County
8 community water systems serving Flathead County.
- F
- D
- F
- C
- C
Show all 8 water systems
- D
19 total water systems serve Flathead County.
Systems with the most violations in Flathead County
5 water systems with recorded EPA violations.
- C
- F
- F
All ZIP Codes in Flathead County
18 ZIP codes tracked in Flathead County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59911 | Bigfork | 67 | C | 0 | $608K |
| 2 | 59912 | Columbia Falls | 59 | C | 23 | $438K |
| 3 | 59937 | Whitefish | 50 | D | 1 | $655K |
| 4 | 59901 | Kalispell | 35 | F | 38 (2 health) | $417K |
| 5 | 59903 | Kalispell | — | — | — | |
| 6 | 59904 | Kalispell | — | — | — | |
| 7 | 59913 | Coram | — | — | $533K | |
| 8 | 59916 | Essex | — | — | $361K | |
| 9 | 59919 | Hungry Horse | — | — | — | |
| 10 | 59920 | Kila | — | — | $669K | |
| 11 | 59921 | Lake Mc Donald | — | — | — | |
| 12 | 59922 | Lakeside | — | — | 0 | $549K |
| 13 | 59925 | Marion | — | — | $366K | |
| 14 | 59926 | Martin City | — | — | — | |
| 15 | 59927 | Olney | — | — | $528K | |
| 16 | 59928 | Polebridge | — | — | — | |
| 17 | 59932 | Somers | — | — | 6 | $618K |
| 18 | 59936 | West Glacier | — | — | $563K |
Recommended Buyer Guides for Flathead County
Four sources - EPA, NSF, FEMA, CDC - drive the match.
- 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 Flathead County, Montana
Overview
Flathead County in Montana covers 18 tracked ZIP records with an average Home Safety Score of D (53/100) across 4 scored records.
4 of 6 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 2 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.
What You Can Do
Flathead County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
47.6% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.