Effingham, Illinois Air Quality
Effingham County, Illinois (IL)
→ 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 | 44 | 74 | 140 | 182 | 50 | 10 | Ozone |
| 2022 | 38 | 51 | 100 | 215 | 24 | 0 | Ozone |
| 2021 | 37 | 46 | 77 | 226 | 11 | 0 | Ozone |
| 2020 | 37 | 48 | 84 | 156 | 10 | 0 | Ozone |
| 2019 | 40 | 50 | 84 | 224 | 21 | 0 | Ozone |
| 2018 | 39 | 51 | 112 | 214 | 30 | 1 | Ozone |
| 2017 | 43 | 61 | 112 | 206 | 35 | 3 | Ozone |
| 2016 | 39 | 54 | 93 | 181 | 33 | 0 | Ozone |
| 2015 | 40 | 50 | 84 | 184 | 19 | 0 | Ozone |
| 2014 | 38 | 51 | 90 | 187 | 25 | 0 | Ozone |
What This Means for Effingham County Residents
Effingham, Illinois has received an Air Quality Grade of B (65/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 44 falls in the "Good" range.
The primary pollutant affecting this area is Ground-Level Ozone. Over the past 5 years, this area has averaged 2 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
Related Cities in Illinois
Frequently Asked Questions
Effingham, Illinois has a current median AQI of 44, which falls in the "Good" range. The area has received an Air Quality Grade of B (65/100) based on 10 years of EPA monitoring data.
Air quality in Effingham, Illinois is stable over the past decade. The median AQI has changed by +6 points from 2014 to 2023.
Effingham, Illinois averages 2 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting Effingham, Illinois is Ground-Level Ozone. This is the dominant contributor to elevated AQI readings in the Effingham County area.
Effingham, Illinois averages 2 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Ground-Level Ozone, which is a known asthma trigger.
With a median AQI of 44 (Good), outdoor exercise in Effingham, Illinois is generally safe year-round. Effingham, Illinois averages 2 days per year when athletes should move workouts indoors.