The motor vehicle is a major source of both NO x and VOCs. Ozone is a respiratory irritant, and has been associated with a decline in lung function and increased hospitalizations for those with pre-existing respiratory problems. Recent studies indicate that ozone may be causing health effects, even at low concentrations.
Ozone is also harmful to plants and to various materials.
Ozone is currently being monitored at more than 25 sites in the province. Data are forwarded to a central electronic database for storage. This report provides an overview of provincial ozone levels based on data collected between 1986-1997. Data from 19 sites were evaluated. Site selection was based in part on data availability and on obtaining as broad a geographical cross section of the province as possible.