Air Monitoring

Monitoring Standards

The Bureau monitors air quality levels in compliance with EPA's National Ambient Air Quality Standards (NAAQS) for particulate matter and ozone.  The particulate standard requires the monitoring of PM 2.5 and is set at a concentration of 12 micrograms per cubic meter (µg/m3), with a 24-hour standard set at 35 µg/m3.  The standard for ozone is based on an 8-hour standard of 75 parts per billion.  These standards are set by the EPA based on numerous health studies showing adverse effects from chronic exposure.air-monitor-smaller