Carbon County, Montana
11 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-04
Across Carbon County, EPA compliance data for 11 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Carbon County Compares
How Carbon County Compares
Carbon County scores 3 points above the Montana state average (55/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Carbon County, Montana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14 (asthma 11.2%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $1,095, driven primarily by flood
Infrastructure: 0.362% avg pipe failure probability, 27% of ZIPs at high risk
59.5% 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: $1,095
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,443 housing units in Carbon 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 Carbon County
Remediation costs are relatively manageable for most homeowners in Carbon 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 Carbon 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 Carbon County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | FROMBERG TOWN OF | 500 | 14 |
| 2 | JOLIET TOWN OF | 600 | 5 |
| 3 | Evergreen Subdivision | 45 | 5 |
| 4 | RED LODGE WATER DEPT | 2,000 | 3 |
| 5 | Bearcreek Municipal Water Sys | 200 | 3 |
10 total water systems serve Carbon County.
All ZIP Codes in Carbon County
11 ZIP codes tracked in Carbon County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59008 | Belfry | 70 | B | 0 | $266K |
| 2 | 59070 | Roberts | 70 | B | 1 | $498K |
| 3 | 59014 | Bridger | 69 | C | 2 | $263K |
| 4 | 59029 | Fromberg | 68 | C | 14 (2 health) | $267K |
| 5 | 59068 | Red Lodge | 64 | C | 3 | $414K |
| 6 | 59041 | Joliet | 61 | C | 5 | $326K |
| 7 | 59013 | Boyd | 53 | D | 0 | $503K |
| 8 | 59026 | Edgar | 53 | D | 0 | $346K |
| 9 | 59071 | Roscoe | 53 | D | 0 | — |
| 10 | 59007 | Bearcreek | 40 | D | 0 | $200K |
| 11 | 59066 | Pryor | 40 | D | 0 | $121K |
Recommended Buyer Guides for Carbon County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 59.5% of homes built before 1978
- 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 Carbon County, Montana
Overview
Carbon County in Montana covers 11 ZIP codes with an average Home Safety Score of C (58/100).
5 of 11 ZIP codes have recorded EPA violations. 2 health-based violations 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.