Cass, Nebraska Air Quality
Cass County, Nebraska (NE)
↓ Improvingover 10 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). This area has seen measurable air quality improvement over the 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 | 17 | 35 | 66 | 344 | 10 | 0 | PM10 |
| 2022 | 19 | 40 | 87 | 337 | 19 | 0 | PM10 |
| 2021 | 19 | 37 | 64 | 345 | 6 | 0 | PM10 |
| 2020 | 14 | 32 | 71 | 346 | 12 | 0 | PM10 |
| 2019 | 13 | 26 | 46 | 348 | 0 | 0 | PM10 |
| 2018 | 15 | 31 | 57 | 332 | 5 | 0 | PM10 |
| 2017 | 22 | 49 | 83 | 335 | 30 | 0 | PM10 |
| 2016 | 22 | 48 | 99 | 322 | 30 | 0 | PM10 |
| 2015 | 24 | 54 | 106 | 309 | 43 | 1 | PM10 |
| 2014 | 22 | 51 | 96 | 316 | 41 | 0 | PM10 |
What This Means for Cass County Residents
Cass, Nebraska has received an Air Quality Grade of A (84/100) based on a decade of EPA monitoring data. The current median AQI of 17 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 5 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
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.