2002 Almanac (page 22) Table 1-2 State Ozone Standard: "0.09 ppm for 1 hour," not to be exceeded. National Ozone Standards: "0.12 ppm for 1 hour," not to be exceeded more than once per year and "0.08 ppm for 8 hours," "not to be exceeded," based on the fourth highest concentration averaged over three years.