Silver Bow County, Montana
8 ZIP codes · Avg score 55/100 · Grade C · Updated 2026-06-03
Across Silver Bow County, EPA compliance data for 8 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Silver Bow County Compares
How Silver Bow County Compares
Silver Bow County scores 0 points above the Montana state average (55/100) and 13 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Silver Bow County, Montana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.6 (asthma 11.1%, diabetes 10.2%)
Estimated additional annual cost per homeowner: $1,058, driven primarily by ust_tanks
Infrastructure: 0.328% avg pipe failure probability, 25% of ZIPs at high risk
55.6% 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,058
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
17,490 housing units in Silver Bow 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 Silver Bow County
Remediation costs are relatively manageable for most homeowners in Silver Bow 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 Silver Bow County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 3 systems in Silver Bow County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Butte Silverbow Water Department | 33,000 | 47 |
| 2 | Galen Facility | 90 | 40 |
| 3 | Ramsay Water and Sewer District | 97 | 7 |
All ZIP Codes in Silver Bow County
8 ZIP codes tracked in Silver Bow County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 59701 | Butte | 63 | C | 8 | $219K |
| 2 | 59748 | Ramsay | 63 | C | 7 | $271K |
| 3 | 59702 | Butte | 59 | C | 8 | — |
| 4 | 59703 | Butte | 59 | C | 8 | — |
| 5 | 59707 | Butte | 59 | C | 8 | — |
| 6 | 59750 | Butte | 59 | C | 8 | $488K |
| 7 | 59727 | Divide | 40 | D | 0 | $348K |
| 8 | 59762 | Wise River | 40 | D | 0 | $440K |
Recommended Buyer Guides for Silver Bow County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 55.6% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Silver Bow County, Montana
Overview
Silver Bow County in Montana covers 8 ZIP codes with an average Home Safety Score of C (55/100).
6 of 8 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.