San Miguel County, Colorado
4 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-04
Within San Miguel County, safety data across 4 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How San Miguel County Compares
How San Miguel County Compares
San Miguel County scores 2 points below the Colorado state average (60/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
Key Risk Factors
Health risk index: 10.6 (asthma 10.5%, diabetes 8.7%)
Estimated additional annual cost per homeowner: $470, driven primarily by energy_code_gap
Infrastructure: 0.338% avg pipe failure probability
37.3% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across San Miguel County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 12 violations. Past 5 years: 19 total (19 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $470
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,562 housing units in San Miguel 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 San Miguel County
Remediation costs are relatively manageable for most homeowners in San Miguel 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 San Miguel 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 San Miguel County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Mountain Village Town of | 9,700 | 83 |
| 2 | Telluride Town of | 7,900 | 51 |
| 3 | Aldasoro Ranch Hoc | 412 | 51 |
| 4 | Wilson Mesa | 290 | 51 |
| 5 | San Bernardo Hoa | 132 | 51 |
10 total water systems serve San Miguel County.
All ZIP Codes in San Miguel County
4 ZIP codes tracked in San Miguel County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 81430 | Placerville | 65 | C | 31 (2 health) | $1004K |
| 2 | 81435 | Telluride | 59 | C | 51 (6 health) | $706K |
| 3 | 81423 | Norwood | 55 | C | 10 | $412K |
| 4 | 81426 | Ophir | 54 | D | 32 (10 health) | $875K |
Recommended Buyer Guides for San Miguel County
Filtered against federal data, fitted to local risks.
- 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
Overview
San Miguel County in Colorado covers 4 ZIP codes with an average Home Safety Score of C (58/100).
4 of 4 ZIP codes have recorded EPA violations. 18 health-based violations have been documented.
← Back to Colorado 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.