Ravalli County, Montana
9 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Within Ravalli County, safety data across 9 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How Ravalli County Compares
How Ravalli County Compares
Ravalli County scores 5 points above the Montana state average (55/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Ravalli County, Montana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 10.5%, diabetes 10.4%)
Estimated additional annual cost per homeowner: $1,844, driven primarily by wildfire
Infrastructure: 0.334% avg pipe failure probability, 13% of ZIPs at high risk
53% 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,844
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
18,982 housing units in Ravalli 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 Ravalli County
Remediation costs are relatively manageable for most homeowners in Ravalli 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 Ravalli 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 Ravalli County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | DARBY TOWN OF | 850 | 9 |
| 2 | Trapper Creek Job Corps | 275 | 9 |
| 3 | Kootenai Creek Village | 175 | 9 |
| 4 | Stevensville Town of | 2,090 | 8 |
| 5 | Whispering Trees Mobile Park | 100 | 8 |
15 total water systems serve Ravalli County.
All ZIP Codes in Ravalli County
9 ZIP codes tracked in Ravalli County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59828 | Corvallis | 70 | B | 0 | $429K |
| 2 | 59840 | Hamilton | 70 | B | 1 | $399K |
| 3 | 59829 | Darby | 66 | C | 9 (1 health) | $401K |
| 4 | 59841 | Pinesdale | 66 | C | 0 | $198K |
| 5 | 59870 | Stevensville | 66 | C | 8 | $466K |
| 6 | 59827 | Conner | 53 | D | 0 | $482K |
| 7 | 59871 | Sula | 53 | D | 0 | $441K |
| 8 | 59875 | Victor | 53 | D | 0 | $460K |
| 9 | 59835 | Grantsdale | 40 | D | 0 | — |
Recommended Buyer Guides for Ravalli County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 53% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Ravalli County, Montana
Overview
Ravalli County in Montana covers 9 ZIP codes with an average Home Safety Score of C (60/100).
3 of 9 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Montana 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.