Clark, Indiana Air Quality
Clark County, Indiana (IN)
→ Stableover 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).
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 | 52 | 72 | 182 | 146 | 208 | 11 | PM2.5 |
| 2022 | 51 | 66 | 119 | 170 | 192 | 1 | PM2.5 |
| 2021 | 52 | 71 | 96 | 160 | 205 | 0 | PM2.5 |
| 2020 | 50 | 62 | 92 | 186 | 180 | 0 | PM2.5 |
| 2019 | 45 | 62 | 101 | 225 | 139 | 1 | Ozone |
| 2018 | 37 | 61 | 122 | 276 | 77 | 4 | Ozone |
| 2017 | 40 | 60 | 101 | 286 | 77 | 1 | Ozone |
| 2016 | 49 | 67 | 143 | 195 | 163 | 7 | PM2.5 |
| 2015 | 52 | 70 | 164 | 160 | 200 | 4 | PM2.5 |
| 2014 | 54 | 74 | 122 | 123 | 210 | 2 | PM2.5 |
What This Means for Clark County Residents
Clark, Indiana has received an Air Quality Grade of C (58/100) based on a decade of EPA monitoring data. The current median AQI of 52 falls in the "Moderate" range.
The primary pollutant affecting this area is Fine Particulate Matter (PM2.5). Over the past 5 years, this area has averaged 3 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.