The Puget Sound Clean Air Agency has issued a "stage one" burn ban in Pierce and Snohomish counties. Fires are prohibited in fireplaces and uncertified wood stoves.

The Puget Sound Clean Air Agency has issued a “stage one” burn ban in Pierce and Snohomish counties. Fires are prohibited in fireplaces and uncertified wood stoves.

KOMO-TV ( http://is.gd/muyTa2) reports the burn ban takes effect at 5 p.m. Saturday.

The clean air agency is expecting air pollution to reach unhealthy levels for sensitive groups, especially where wood-burning is common.

The purpose of the burn ban is to reduce the amount of pollution from excessive wood smoke.

Information from: KOMO-TV, http://www.komotv.com/