OZONE VALUES & CONCENTRATIONS
In Parts Per Million
(PPM)
SMOG
= A MIXTURE OF GASES IN CITIES GENERATED BY AUTO AND INDUSTRIAL EMISSIONS. SMOG CONSISTS OF HYDROCARBONS, NITROGEN OXIDES, SULFUR OXIDES AND OZONE.
SAFE LEVELS - 24 hrs a day
CAUTION LEVEL
DANGER LEVEL
SAFE LEVELS - 8 hrs a day
EXTRA CAUTION
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