Custer, Oklahoma Air Quality
Custer County, Oklahoma (OK)
→ Stableover 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 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 |
|---|---|---|---|---|---|---|---|
| 2019 | 14 | 26 | 58 | 235 | 1 | 0 | PM10 |
| 2018 | 16 | 31 | 104 | 355 | 8 | 1 | PM10 |
| 2017 | 17 | 30 | 88 | 302 | 3 | 0 | PM10 |
| 2016 | 15 | 25 | 64 | 357 | 3 | 0 | PM10 |
| 2015 | 15 | 28 | 38 | 135 | 0 | 0 | PM10 |
What This Means for Custer County Residents
Custer, Oklahoma has received an Air Quality Grade of A (80/100) based on a decade of EPA monitoring data. The current median AQI of 14 falls in the "Good" range.
The primary pollutant affecting this area is Coarse Particulate Matter (PM10). Over the past 5 years, this area has averaged 0 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.