Throughout the United States, Ozone Action Days are declared when concentrations are highest. These declarations alert people with asthma to avoid the smog as much as possible by remaining in air-conditioned places and by taking other measures to avoid irritants and allergens. During Ozone Action Days, people with asthma should limit their time outdoors, especially from 11 a.m. to 8 p.m. Most of all, do not exercise outdoors on Ozone Action Days. As always, use your peak flow meter and follow your asthma daily management and action plans.
PSI is reported as a percentage of the federal health standard for ozone.
You may still have to adjust your activities and medications. Yes, but your concern should be appropriate to the type of environment in which you work. If you work with volatile solvents, sprayed substances, powders, or known carcinogens or allergens, your potential risks are high. Even if you work in what seems to be a chemical-free environment, you may still be exposed to air pollution. Older structures may contain mold spores or cockroaches, both powerful allergens.