Washington Administrative Code
Title - Northwest Clean Air Agency
400 - STANDARDS
Sec2 424 - OZONE STANDARD
Universal Citation: WA Admin Code 424
Current through Register Vol. 24-18, September 15, 2024
424.1 The average eight hour concentration of ozone measured at an ambient air monitoring station shall not exceed 0.080 ppm (157 micrograms per cubic meter) as determined under the following conditions:
424.11 The 3-year
average of the annual fourth highest daily maximum 8-hour average
concentrations shall be used to determine compliance with this
standard;
424.12 All hourly
measurements must start on the clock hour.
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