New York state issued an ozone air quality health advisory for Long Island and the New York City metro region through Tuesday, May 19, covering Nassau, Suffolk, New York City, Rockland and Westchester counties.
New York state issued an air quality health advisory for Long Island and the New York City metro region on Monday, warning that ozone levels could reach unhealthy levels through Tuesday evening.
The advisory, announced by the New York State Department of Environmental Conservation and the New York State Department of Health, covered Nassau, Suffolk, New York City, Rockland and Westchester counties. It was in effect from 11 a.m. to 11 p.m. on Tuesday, May 19, 2026.
State health guidance says ozone can be especially concerning for people with heart or lung disease, children, older adults, outdoor workers and anyone exercising outdoors. Officials advise limiting strenuous activity when ozone levels are highest.
The departments said advisories are issued when elevated air pollution is predicted and conditions may pose health risks to sensitive groups.
Residents in the affected area were urged to stay aware of air quality conditions and reduce prolonged outdoor exertion during the advisory window.
Revision note
Initial automated publication.