An air quality watch will be in effect Monday in 33 Wisconsin counties in the eastern part of the state because of particle pollution.

The Wisconsin Department of Natural Resources says the watch was issued because the forecast calls for elevated levels of fine particles in the air.

The Air Quality Index in those counties is expected to reach orange levels, which means it's unhealthy for children, older adults and those with respiratory conditions.

Officials are advising people in those groups to cut back on strenuous activities.

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Counties affected include: Brown, Calumet, Columbia, Dane, Dodge, Door, Fond du Lac, Green, Green Lake, Iowa, Jefferson, Kenosha, Kewaunee, Lafayette, Manitowoc, Marinette, Marquette, Menominee, Milwaukee, Oconto, Outagamie, Ozaukee, Racine, Rock, Sauk, Shawano, Sheboygan, Walworth, Washington, Waukesha, Waupaca, Waushara and Winnebago.