Harrison, West Virginia Air Quality
Harrison County, West Virginia (WV)
↓ 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 | 39 | 61 | 166 | 82 | 24 | 1 | PM2.5 |
| 2022 | 34 | 55 | 69 | 93 | 20 | 0 | PM2.5 |
| 2021 | 35 | 58 | 69 | 82 | 33 | 0 | PM2.5 |
| 2020 | 35 | 53 | 80 | 99 | 19 | 0 | PM2.5 |
| 2019 | 41 | 56 | 64 | 84 | 27 | 0 | PM2.5 |
| 2018 | 36 | 58 | 65 | 88 | 29 | 0 | PM2.5 |
| 2017 | 40 | 56 | 71 | 88 | 34 | 0 | PM2.5 |
| 2016 | 41 | 56 | 66 | 78 | 39 | 0 | PM2.5 |
| 2015 | 46 | 61 | 86 | 65 | 51 | 0 | PM2.5 |
| 2014 | 44 | 59 | 76 | 68 | 52 | 0 | PM2.5 |
What This Means for Harrison County Residents
Harrison, West Virginia has received an Air Quality Grade of B (74/100) based on a decade of EPA monitoring data. The current median AQI of 39 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 Fine Particulate Matter (PM2.5). 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.