Baltimore (City), Maryland Air Quality
Baltimore (City) County, Maryland (MD)
↓ 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 | 44 | 71 | 192 | 242 | 116 | 7 | PM2.5 |
| 2022 | 44 | 64 | 112 | 242 | 109 | 2 | Ozone |
| 2021 | 43 | 61 | 93 | 243 | 121 | 0 | PM2.5 |
| 2020 | 38 | 56 | 97 | 293 | 70 | 0 | PM2.5 |
| 2019 | 46 | 65 | 126 | 217 | 140 | 6 | PM2.5 |
| 2018 | 51 | 74 | 129 | 182 | 174 | 8 | PM2.5 |
| 2017 | 46 | 62 | 112 | 221 | 141 | 3 | PM2.5 |
| 2016 | 49 | 73 | 156 | 192 | 168 | 6 | PM2.5 |
| 2015 | 53 | 76 | 140 | 159 | 200 | 6 | PM2.5 |
| 2014 | 52 | 68 | 95 | 146 | 219 | 0 | PM2.5 |
What This Means for Baltimore (City) County Residents
Baltimore (City), Maryland has received an Air Quality Grade of B (71/100) based on a decade of EPA monitoring data. The current median AQI of 44 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 8 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 3 unhealthy air quality days per year — days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity.