Grand County, Colorado
8 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Monitoring figures for Grand County indicate average water quality overall — some ZIP codes among the 8 tracked have recorded health-based violations, while others operate cleanly, making individual ZIP-level data the most actionable reference point.
How Grand County Compares
How Grand County Compares
Grand County scores 3 points above the Colorado state average (60/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Grand County, Colorado
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.1 (asthma 10.8%, diabetes 9.1%)
Estimated additional annual cost per homeowner: $840, driven primarily by energy_code_gap
Infrastructure: 0.344% avg pipe failure probability, 13% of ZIPs at high risk
50.1% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Grand County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 1 violation. Past 5 years: 2 total (2 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: $840
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,437 housing units in Grand 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 Grand County
Remediation costs are relatively manageable for most homeowners in Grand 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 Grand 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 Grand County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Winter Park Ranch Water Supply District | 3,250 | 24 |
| 2 | Fraser Town of | 2,150 | 24 |
| 3 | Granby Town of South Service Area | 2,300 | 23 |
| 4 | Winter Park Water Supply District | 6,635 | 21 |
| 5 | Grand County Water No 1 | 5,400 | 21 |
21 total water systems serve Grand County.
All ZIP Codes in Grand County
8 ZIP codes tracked in Grand County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 80447 | Grand Lake | 70 | B | 0 | $576K |
| 2 | 80442 | Fraser | 69 | C | 3 | $597K |
| 3 | 80482 | Winter Park | 69 | C | 21 (1 health) | $563K |
| 4 | 80478 | Tabernash | 66 | C | 0 | $993K |
| 5 | 80459 | Kremmling | 65 | C | 17 (1 health) | $354K |
| 6 | 80446 | Granby | 63 | C | 14 | $506K |
| 7 | 80451 | Hot Sulphur Springs | 63 | C | 6 | $387K |
| 8 | 80468 | Parshall | 40 | D | 0 | $617K |
Recommended Buyer Guides for Grand County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 50.1% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Grand County, Colorado
Overview
Grand County in Colorado covers 8 ZIP codes with an average Home Safety Score of C (63/100).
5 of 8 ZIP codes have recorded EPA violations. 2 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.