The Regional Air Pollution Control Agency is committed to operating a quality-assured monitoring network that generates accurate measurements of ambient air quality in its jurisdiction. These monitoring data are used to measure progress toward attainment of EPA’s National Ambient Air Quality Standards (NAAQS), assess source contributions to air pollution, and assist in the protection of public health.

RAPCA operates and maintains 15 ambient air quality monitors at 12 sites ,distributed over five counties in RAPCA’s six-county jurisdiction.

Monitoring sites are selected based on a number of factors including computer modeling of atmospheric chemistry and air dispersion, access to power, security, and public interest. Four air pollutants (carbon monoxide, ozone, particulate matter and sulfur dioxide) are measured at the sites described below.

For more information about RAPCA's air quality monitoring program, please see our Annual Ambient Air Monitoring Network Review.