Gilpin, Colorado Air Quality
Gilpin County, Colorado (CO)
↑ Worseningover 5 years
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). Air quality in this area has been declining over the past decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 47 | 71 | 129 | 258 | 103 | 4 | Ozone |
| 2022 | 45 | 64 | 112 | 286 | 75 | 4 | Ozone |
| 2021 | 46 | 84 | 151 | 250 | 94 | 19 | Ozone |
| 2020 | 45 | 67 | 136 | 278 | 70 | 9 | Ozone |
| 2019 | 45 | 58 | 115 | 117 | 25 | 1 | Ozone |
What This Means for Gilpin County Residents
Gilpin, Colorado has received an Air Quality Grade of C (57/100) based on a decade of EPA monitoring data. The current median AQI of 47 falls in the "Good" range.
Concerning trends show air quality has been declining, with the median AQI rising by 2 points over the monitoring period. This could be driven by increased development, wildfire smoke, or industrial activity.
The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 7 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.