Passive Ozone Sampling

Passive ozone samplers provide a low-cost alternative for the monitoring of ozone on a weekly basis. This monitoring method involves exposing nitrite coated filters to the environment for a known period of time, and determining the quantities of ozone via the quantity of nitrate produced by the ozone’s interaction with the filters. This method is employed by several national parks and the US Forest Service to determine ozone impacts to tree species and other vegetation.

Portable continuous samplers for ozone are battery powered ozone samplers which take continual measurements of ozone concentrations. These devices are useful in determining hourly ozone concentrations.

Sources: Ray, John D. and Flores, Miguel. 1993. Evaluation of Passive Samplers for Field Measurements of Ambient Ozone in the National Parks. EPA/AWMA Conference Symposium on Air Toxics and Related Air Pollutants.

Rocky Mountain Research Station. Focus: Air Quality in Mountain Ecosystems - Ozone. Accessed on 28 March 2012. Available at

US National Park Service. 2007. Passive Ozone Sample Monitoring Program. Accessed 14 march 2012. Available at

2B Technologies. 2012. 2B Technologies Model 202 Ozone Monitor. Accessed on 9 September 2013. Available at