Lake, California Air Quality
Lake County, California (CA)
↓ 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 | 32 | 39 | 67 | 357 | 6 | 0 | Ozone |
| 2022 | 32 | 43 | 76 | 359 | 4 | 0 | Ozone |
| 2021 | 33 | 43 | 157 | 348 | 7 | 1 | Ozone |
| 2020 | 32 | 44 | 190 | 341 | 6 | 4 | Ozone |
| 2019 | 31 | 42 | 50 | 360 | 0 | 0 | Ozone |
| 2018 | 33 | 43 | 233 | 344 | 10 | 3 | Ozone |
| 2017 | 35 | 44 | 172 | 350 | 10 | 2 | Ozone |
| 2016 | 33 | 44 | 74 | 356 | 9 | 0 | Ozone |
| 2015 | 36 | 47 | 148 | 351 | 11 | 1 | Ozone |
| 2014 | 37 | 48 | 93 | 333 | 24 | 0 | Ozone |
What This Means for Lake County Residents
Lake, California has received an Air Quality Grade of B (73/100) based on a decade of EPA monitoring data. The current median AQI of 32 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 Ground-Level Ozone. Over the past 5 years, this area has averaged 1 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.