Iowa officials are warning about poor air quality around Cedar Rapids and Waterloo because of high levels of fine particles in the air. The state Department of Natural Resources issued an advisory Monday for Linn and Black Hawk counties. The department says fine particle pollution levels have risen above the Environmental Protection Agency's health standards. The EPA threshold for fine particles is 35 micrograms per cubic meter. As of noon Monday, the fine particle level in Cedar Rapids was 41.2 and Waterloo hit 47.3. Several other locations in the state also reported elevated levels. State officials recommend people living in Linn and Black Hawk counties with respiratory or heart disease, the elderly, and children limit prolonged outdoor exertion. The particle pollution is expected to improve Tuesday morning when northeast winds move in.
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