Air and climate laws, regulations, and policies

Gases, particles and toxics in the air we breathe can harm our lungs and threaten our health. The Department of Environmental Protection is working continuously to reduce the risks posed by air pollution and climate change. Find regulations, standards, policies, and environmental laws on air and climate here.

Air pollutants fact sheets

Acid rain, carbon monoxide, haze, lead, nitrogen dioxide, ozone, particulate matter, sulfur dioxide, and toxics are all pollutants. Check these air fact sheets to learn about what each pollutant is and where it comes from, health and environmental effects, standards and long-term trends, and more.

Air quality and monitoring

Wondering how clean or polluted the air is in your part of Massachusetts, and what it might mean for your health? Here you can access the Daily Air Quality Forecast, download data for research, obtain pollution reports and studies, select from a variety of air pollutants, locations, and time periods to develop custom graphs showing emission trends over time, Learn about the Department of Environmental Protection's statewide ambient air quality monitoring network.

Air quality forecast

The Department of Environmental Protection provides a daily ozone forecast from May through September and a daily fine particle forecast all year round.

Current pollution levels

Check the daily air quality forecast and current pollution levels, sign up for air quality alerts, learn about good and bad ozone, particle pollution, health effects of pollution, and more.

Drinking water

There are many causes of tap water contamination, ranging from agricultural runoff, to improper use of household chemicals, and everything in between. Few of us realize the extent or impact of these low level synthetic chemicals in the water we use. Unless we take steps now, our tap water will no longer be safe.

Transportation, fuels, and air quality

Motor vehicles, engines, and fuels are among the leading contributors to air pollution in Massachusetts. Each of us can make a difference in the quality of the air we breathe by driving clean-running and fuel-efficient vehicles, keeping them well maintained, and making smart commuting choices.

Beaches and algae

While most algae are harmless to humans, some species of these microscopic organisms can make fish and people sick. The Department of Public Health monitors area beaches for algae blooms and issues advisories to the public. Learn what you can do to help protect the shore.

Bisphenol A (BPA)

Be sure to check out the Public Health Advisory regarding bisphenol A (BPA) to find out why you should avoid heating plastic containers with the recycling number 7 and the letters PC in microwave ovens, in water on the stovetop, or by adding boiling water into them, particularly when preparing infant formula.

Indoor air quality

Check out these indoor air quality assessments conducted in public schools, courthouses, town halls, libraries, and other public buildings to learn what's being done to improve indoor air quality.

Extreme heat

A prevention guide to promote your personal health and safety.