Protecting Oregon's Environment
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Oregon Department of Environmental Quality

Air Quality

Air Pollution Advisories

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Air Pollution Advisories

An Air Pollution Advisory is a call-to-action that DEQ issues to encourage individuals and businesses to reduce pollution-producing activities during summer hot spells and winter air stagnation times.

During summer, DEQ issues Air Pollution Advisories for Smog (ozone) in the Portland, Salem and Medford areas when hot temperatures and low winds cause smog levels to rise.

During winter, DEQ issues Air Pollution Advisories for Particle Pollution (PM2.5) for any area of the state when cold temperatures and stagnant air cause particle pollution levels to rise.

Local air quality advisories

Certain jurisdictions in Oregon issues their own air advisories. Click on these links if you live in these areas to find out about air quality forecast.

Air Quality Index

The Air Quality Index (AQI) is a color-coded tool which shows air pollution levels. It is a scale used to report actual levels of ozone and other common pollutants in the air. The higher the AQI, the higher the health concern. The AQI is divided into categories that correspond to different levels of health concern.

Air pollution and your health


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For more information about Air Quality call 503-229-5696

For reporting pollution problems contact Complaints

For technical assistance contact DEQINFO

Oregon Department of Environmental Quality
Headquarters: 700 NE Multnomah Street, Suite 600, Portland, OR 97232
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

The Oregon Department of Environmental Quality is a regulatory agency authorized to protect Oregon's environment by
the State of Oregon and the Environmental Protection Agency.

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