Find out how what air quality is like your part of Massachusetts at the moment, and what it might mean for your health.
MassDEP issues ozone (smog) forecasts between April and October and fine particle pollution forecasts year-round.
Annual reports, state implementation plans, summaries of ambient air monitoring data and long-term emissions trends.
MassDEP's current health-based Allowable Ambient Limits (AALs) and Threshold Effects Exposure Limits (TELs), used to evaluate health risks from exposure to toxic chemicals in the air.
Information on a range of air pollutants, including hazardous air pollutants or air toxics: what they are, where they come from, how they affect our health and the environment, and what state government is doing to address them.
Select from a variety of air pollutants, locations and time periods to develop custom graphs showing emission trends over time.
Learn about the causes of localized particle pollution, which can be a year-round problem, and get a "snapshot" of current fine particle levels in specific parts of the state.
Learn about the ways in which air pollutants can affect our health and the environment around us.
Learn about the MassDEP statewide ambient air quality monitoring network.
Learn about mobile, stationary and area sources of air pollution.