The highest AQ index in Maryland (as of 20:00 EDT) is currently the Lower Eastern Shore area. Ozone (OZONE) is measuring at 47 (Good). This means air quality is satisfactory, and air pollution poses little or no risk.
Over the next few days, the highest Ozone (OZONE) will be in the Maryland Piedmont area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Improving air quality this weekend after Good to low Moderate AQI due to ozone on Saturday. Cooler, cleaner coastal air will infiltrate much of the eastern half of the state Friday night into Saturday morning keeping air quality concerns low and the AQI forecast Good. West of the coastal front, hot conditions persist, allowing ozone to persist in the Moderate AQI range for another day. A cold front sweeps through the area Saturday night ushering in a much cooler airmass and windy conditions for Sunday with a reinforcement of cold air for Monday, leading to Good AQI both days. Temperatures are slow to recover into next week, leading to persisting Good air quality. It is noted, however, that the region remains dry and fire prone. Short of any wildfires, Good air quality conditions prevail beyond Saturday. For the latest air quality information, please visit our website here. Ground-level ozone forecasts for the 2026 season have started this week and will persist until mid-September. Maryland ozone forecasting aligns with the warm season, when increasing temperatures and sunlight are capable of increasing ground-level ozone concentrations. Fine particle forecasting continues year-round. -MDE
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 17 minutes ago
Below is a list of counties in Maryland. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.