Air quality remained at unhealthy levels in the early afternoon Friday.
The Air Quality Index for a Hollister station on Fairview Road measured at 117 as of shortly before 1 p.m., according to the Monterey Bay Air Resources District.
The AQI measures pollutants, or particles, in the air. Measurements between 100-150 are considered unhealthy for sensitive groups, members of which should avoid prolonged activities outdoors. Measurements from 150-200 are considered unhealthy overall.
Air quality in the region has been poor over the past week due to the Camp Fire in Butte County. Schools have responded in a variety of ways, with Gavilan College cancelling classes Thursday and Friday (the AQI in Gilroy was 188 in the early afternoon Friday) and some outdoor activities cancelled at local schools.