Lake, Indiana Air Quality
Lake 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 | 55 | 80 | 215 | 125 | 222 | 18 | PM2.5 |
| 2022 | 52 | 69 | 143 | 152 | 208 | 5 | PM2.5 |
| 2021 | 54 | 72 | 175 | 134 | 225 | 6 | PM2.5 |
| 2020 | 52 | 68 | 136 | 161 | 199 | 6 | PM2.5 |
| 2019 | 52 | 72 | 101 | 151 | 213 | 1 | PM2.5 |
| 2018 | 54 | 69 | 151 | 139 | 220 | 6 | PM2.5 |
| 2017 | 49 | 66 | 173 | 203 | 157 | 5 | PM2.5 |
| 2016 | 51 | 67 | 242 | 183 | 177 | 6 | PM2.5 |
| 2015 | 54 | 74 | 151 | 141 | 218 | 6 | PM2.5 |
| 2014 | 61 | 80 | 156 | 66 | 291 | 8 | PM2.5 |
What This Means for Lake County Residents
Lake, Indiana has received an Air Quality Grade of C (58/100) based on a decade of EPA monitoring data. The current median AQI of 55 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 7 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.