Washington County, Colorado
3 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-06-03
Covering 3 ZIP codes, Washington County falls in the average tier for tap water safety — violations appear in a meaningful share of areas, and the data suggests quality depends heavily on which specific part of the county a household sits in.
How Washington County Compares
How Washington County Compares
Washington County scores 3 points below the Colorado state average (60/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 12.4 (asthma 11.1%, diabetes 10.5%)
Estimated additional annual cost per homeowner: $940, driven primarily by energy_code_gap
Infrastructure: 0.48% avg pipe failure probability, 100% of ZIPs at high risk
79% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Washington County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 2 violations. Past 5 years: 3 total (3 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: $940
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,792 housing units in Washington 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 Washington County
Remediation costs are relatively manageable for most homeowners in Washington 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 Washington County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
All ZIP Codes in Washington County
3 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 80720 | Akron | 65 | C | 5 (1 health) | $209K |
| 2 | 80743 | Otis | 65 | C | 13 (1 health) | $227K |
| 3 | 80740 | Lindon | 40 | D | 0 | $245K |
Recommended Buyer Guides for Washington County
Filtered against federal data, fitted to local risks.
- Best Lead Paint Test Kits — 79% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Overview
Washington County in Colorado covers 3 ZIP codes with an average Home Safety Score of C (57/100).
2 of 3 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.