Watch out for smog on July 4. State health and environmental officials have issued an air quality health advisory for Sunday between 10 a.m. and 10 p.m., citing predicted high levels of ozone.
Ground-level ozone is a major component of smog and can aggravate respiratory problems, such as asthma. It forms on hot summer days when vehicle exhaust and emissions from out-of-state power plants react with sunlight.
DEC meteorologists predict that ozone levels on Long Island, the New York City metro area and Western New York will exceed federal health standards that day, with the highest levels expected between in the afternoon and early evening.
Health officials recommend that people with respiratory diseases and those who exercise or work outdoors consider limiting outdoor activities during that time.
Residents are urged to conserve energy and use mass transit or carpool; automobile emissions account for about 60 percent of pollution in urban areas, officials said. For more information, call the state hotline at (800) 535-1345 or go to http://www.dec.ny.gov or http://www.health.state.ny.us.