Valley under ozone watch - East Valley Tribune: East Valley Local News

Valley under ozone watch

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Posted: Monday, July 18, 2011 4:40 pm

The Valley is under an ozone health watch Monday. Hourly ozone concentrations have been rising rapidly over the central portion of the Valley. Ozone is an invisible gas that can aggravate existing health conditions such as asthma.

Ozone is created when pollutants in the air are heated by the sun. Westerly winds that are expected to be in the Valley Tuesday afternoon should help disperse the ozone, though production could remain high, according to the Department of Environmental Quality.

People with heart or lung disease, older adults, and children should reduce prolonged or heavy exertion outside for the remainder of Wednesday.

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