Quality of Air Monthly Reports
Main_Content
In an effort to keep Maryland citizens informed about the region's air quality, the Ambient Air Monitoring Program publishes monthly air quality reports for the following forecast regions: Baltimore, Eastern Shore, Washington DC, and Western Maryland. These reports provide basic statistics regarding the two major pollutants in Maryland: ground-level ozone and fine particles, which are reported using the color-coded Air Quality Index (AQI) to relate pollutant levels to associated health effects. Get involved and know what we are breathing each month by downloading the quality of air monthly reports!
Monthly AQI summaries
Click on appropriate check mark to open pdf document. For more information about how AQI was calculated see technical information tab.
|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
2023 |
|
|
|
|
|
|
|
|
2022 |
|
|
|
|
|
|
|
|
|
|
|
|
2021 |
|
|
|
|
|
|
|
|
|
|
|
|
2020 |
|
|
|
|
|
|
|
|
|
|
|
|
2019 |
|
|
|
|
|
|
|
|
|
|
|
|
2018 |
|
|
|
|
|
|
|
|
|
|
|
|
2017 |
|
|
|
|
|
|
|
|
|
|
|
|
2016 |
|
|
|
|
|
|
|
|
|
|
|
|
2015 |
|
|
|
|
|
|
|
|
|
|
|
|
2014 |
|
|
|
|
|
|
|
|
|
|
|
|
2013 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
2023 |
|
|
|
|
|
|
|
|
2022 |
|
|
|
|
|
|
|
|
|
|
|
|
2021 |
|
|
|
|
|
|
|
|
|
|
|
|
2020 |
|
|
|
|
|
|
|
|
|
|
|
|
2019 |
|
|
|
|
|
|
|
|
|
|
|
|
2018 |
|
|
|
|
|
|
|
|
|
|
|
|
2017 |
|
|
|
|
|
|
|
|
|
|
|
|
2016 |
|
|
|
|
|
|
|
|
|
|
|
|
2015 |
|
|
|
|
|
|
|
|
|
|
|
|
2014 |
|
|
|
|
|
|
|
|
|
|
|
|
2013 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
2023 |
|
|
|
|
|
|
|
|
2022 |
|
|
|
|
|
|
|
|
|
|
|
|
2021 |
|
|
|
|
|
|
|
|
|
|
|
|
2020 |
|
|
|
|
|
|
|
|
|
|
|
|
2019 |
|
|
|
|
|
|
|
|
|
|
|
|
2018 |
|
|
|
|
|
|
|
|
|
|
|
|
2017 |
|
|
|
|
|
|
|
|
|
|
|
|
2016 |
|
|
|
|
|
|
|
|
|
|
|
|
2015 |
|
|
|
|
|
|
|
|
|
|
|
|
2014 |
|
|
|
|
|
|
|
|
|
|
|
|
2013 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
2023 |
|
|
|
|
|
|
|
|
2022 |
|
|
|
|
|
|
|
|
|
|
|
|
2021 |
|
|
|
|
|
|
|
|
|
|
|
|
2020 |
|
|
|
|
|
|
|
|
|
|
|
|
2019 |
|
|
|
|
|
|
|
|
|
|
|
|
2018 |
|
|
|
|
|
|
|
|
|
|
|
|
2017 |
|
|
|
|
|
|
|
|
|
|
|
|
2016 |
|
|
|
|
|
|
|
|
|
|
|
|
2015 |
|
|
|
|
|
|
|
|
|
|
|
|
2014 |
|
|
|
|
|
|
|
|
|
|
|
|
2013 |
|
|
|
|
|
|
|
|
|
|
|
|
Technical Information
Quality of air monthly reports are published using data from AirNow-Tech . All data is preliminary. AQI calculations were performed using EPA’s 2013 Technical Assistance Document for the reporting of daily air quality. Prior to 2016 reports, all ozone calculations reflect the 2008 8-hour ozone standard. A tighter standard implemented at the end of 2015 is reflected in ozone reporting beginning in 2016. The 2013 strengthening of the PM2.5 annual standard is reflected in all reports. More information about these standards can be found here.
