Environment

Air Quality

Breathing polluted air can pose serious health risks. As late as the 1980s, air pollution regularly blanketed the metropolitan Washington region on hot and humid summer days. The region has made tremendous progress in its air quality thanks to more than a decade of actions at the federal, state, and local government levels; however, there is still more work to be done to reduce pollution further.   

COG, through the Metropolitan Washington Air Quality Committee (MWAQC), coordinates regional air quality planning activities, reviews policies, resolves policy differences, and adopts air quality plans for transmittal to the District of Columbia, Maryland, and Virginia. MWAQC members include area elected officials, environmental directors, and state air management and transportation officials. COG has also been providing regional air quality forecasts since the 1970s, and its Clean Air Partners program educates people on ways to reduce air pollution and protect their health. 

Featured Content

Air Quality Progress Dashboard

Data showing region's progress in improving air quality. 

What We Can Do to Improve Air Quality in the Metropolitan Washington Region 

Report presenting a menu of options to help achieve no unhealthy air days in the region compiled by COG staff for the Metropolitan Washington Air Quality Committee and the Air and Climate Public Advisory Committee.

Environmental Justice Subcommittee

The Environmental Justice (EJ) Subcommittee of the Metropolitan Washington Air Quality Committee is currently developing a regional air quality action plan. To inform the plan development, MWAQC has partnered with Equitable Cities to coordinate public outreach.

News & Multimedia

  • Visualize_2045
    Map

    Visualize 2045: 2020 Amendment Projects Map

    January 29, 2020

    All major projects in the financially constrained element of Visualize 2045, the region's long-range transportation plan. Updated March 2020.

  • Metro_Mornings_John_Brighenti_Flickr
    News

    COG tracks region's progress on reducing air pollutants

    December 17, 2019

    According to COG’s latest Regional Air Quality Update, all six pollutants regulated by the Clean Air Act—carbon monoxide, lead, ground-level ozone, nitrogen...

  • Snyder_MWAQC_May2019_Pete_Marovich
    News

    David Snyder: Despite great progress, we can do more to clean the air

    May 28, 2019

    Recent initiatives to reduce emissions from trucks, buses, and boats, expand electric vehicle use, and educate area residents about air pollution and their...

  • News

    Region's air quality reached unhealthy Code Red levels on Monday

    July 10, 2018

    Ground-level ozone pollution reached unhealthy air quality levels yesterday in metropolitan Washington, marking the first “Code Red” air day for the region this...

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