The monitoring network provides data concerning Pinal County’s air quality so that we can assess compliance with the National Ambient Air Quality Standards (NAAQS) as required by the Federal Clean Air Act. The federal Environmental Protection Agency (EPA) sets air quality standards to protect our health. The standards define how much air pollution is safe in the air outdoors.

Pinal County Air Quality currently measures ozone and particulate matter levels by operating a network of monitoring and sampling equipment throughout Pinal County. The equipment at an air monitoring station can vary from a complex array of continuous air monitors that operate 24 hours a day year-round to a single sampler with a filter that captures particulates every 3—6 days. Data generated from this monitoring network is carefully reviewed, edited and analyzed prior to submittal into EPA’s national air quality database referred to as the Air Quality System (AQS).  The Air Quality Report page has the current and recent pollutant concentrations and AQI values.  The data files below contain historical data for our continuous particulate matter and ozone monitors.