2004 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.