articleThe Brief An air quality health advisory is in effect for New York City until 11 p.m. Saturday. The Air Quality Index is forecast to reach Level Orange, or between 101 and 150. How bad will NYC air quality get? New York issues air quality health advisories when pollution is expected to exceed an AQI of 100. NYC Emergency Management similarly advises people who are particularly sensitive to air pollution to reduce prolonged or heavy outdoor exertion during an air quality health advisory.