Why do cities post ozone levels when talking about air pollution?
Publishing the “ozone level” as a measure of air pollution creates a perception of ozone that is overwhelmingly negative. The fact is ozone itself is not smog. Ultraviolet radiation from the sun creates ozone by splitting off oxygen atoms from the nitrogen oxides emitted by auto exhausts. This is what gives us an ozone level. Many scientists argue this ozone is actually good as it oxidizes other pollutants. Others argue it is a direct indication of auto exhaust levels. Both are correct. Ozone in very strong concentrations can kill plants and irritate a person’s lungs, eyes and nose. The EPA sets ozone standards of .12 ppm and many metropolitan areas repeatedly exceed this standard. OSHA’s maximum work place standards are .1 ppm for an 8-hour day. The difference between “good” ozone and “bad” ozone depends strictly on where it is and how it is being used. If used properly in a specific closely controlled application, it is safe.
Related Questions
- Why do foothill communities like Auburn and Grass Valley show high levels of ozone air pollution even though they’re located away from major metropolitan areas?
- Would dissolved ozone levels higher than 1.0 ppm damage my linens, e.g. cause color fading?
- Why do I need dissolved ozone levels greater than 1.0 ppm?
