File photo: Denise Civiletti

An air quality health advisory has been issued for Long Island today, where the air quality index will rise above 100.

The pollutant of concern is ground-level ozone, a major component of photochemical smog, the State Department of Environmental Conservation said in a press release issued late this morning. Automobile exhaust and out-of-state admission sources are the primary sources of ground-level ozone and the most serious air pollution problems in the Northeast, the DEC said.

Air quality on Long Island today is considered unhealthy for sensitive groups, including young children and people with respiratory conditions, such as asthma.

People should consider limiting outdoor exercise and vigorous work outdoors, according to the New York State Health Department.

The advisory remains in effect until 11 p.m.

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