Douglas County, Colorado
15 ZIP codes · Avg score 56/100 · Grade C
ZipCheckup grade for Douglas County: C.
A mixed picture - some signals here are worth your attention.
Because the C for Douglas County comes from averaging ZIP-level Home Safety Scores, its 15 ZIP reports are where the underlying data can be seen.
How Douglas County Compares
How Douglas County Compares
Douglas County scores 3 points below the Colorado state average (59/100) and 17 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData
ZIP Code Risk Map
Water Quality Map: Douglas County, Colorado
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 9.4 (asthma 10.5%, diabetes 6.8%)
Modeled additional annual cost estimate per homeowner: $784, largest modeled factor: Flood
8% of homes built before 1980 (lead paint was banned for residential use in 1978)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $784
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
134,264 housing units in Douglas 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 Douglas County
Modeled remediation costs in Douglas County can be compared with the median property value; actual costs vary by property.
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 Douglas County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems mapped to Douglas County ZIP codes
8 community water systems mapped to Douglas County ZIP codes; EPA may list more systems serving the county.
- D
- D
- C
- D
- C
- C
Show all 8 water systems
- D
- D
23 water systems mapped to Douglas County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Douglas County
5 water systems with violations in EPA records.
- D
- C
- D
- D
- D
All ZIP Codes in Douglas County
15 ZIP codes tracked in Douglas County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 80126 | Littleton | 67 | C | 0 | $714K |
| 2 | 80129 | Littleton | 67 | C | 0 | $643K |
| 3 | 80130 | Littleton | 67 | C | 0 | $653K |
| 4 | 80104 | Castle Rock | 64 | C | 9 | $587K |
| 5 | 80125 | Littleton | 64 | C | 28 | $708K |
| 6 | 80109 | Castle Rock | 63 | C | 9 | $649K |
| 7 | 80116 | Franktown | 61 | C | 17 | $905K |
| 8 | 80118 | Larkspur | 50 | D | 47 (4 health) | $827K |
| 9 | 80124 | Lone Tree | 48 | D | 7 | $727K |
| 10 | 80138 | Parker | 44 | D | 19 (1 health) | $680K |
| 11 | 80108 | Castle Rock | 41 | D | 26 | $814K |
| 12 | 80134 | Parker | 41 | D | 27 | $643K |
| 13 | 80131 | Louviers | — | — | $396K | |
| 14 | 80135 | Sedalia | — | — | 45 | $895K |
| 15 | 80163 | Littleton | — | — | — |
Recommended Buyer Guides for Douglas County
Each guide below is listed with the reason it appears.
- Water Filters Certified for PFAS Reduction — PFAS detected in 3 ZIP codes
- 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
- 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 Douglas County, Colorado
Overview
Douglas County in Colorado covers 15 tracked ZIP records with an average Home Safety Score of C (56/100) across 12 scored records.
10 of 13 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 5 health-based violations appear in the available health breakdown.
← Back to Colorado Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.