Section 40921 Of Chapter 10. District Plans To Attain State Ambient Air Quality Standards From California Health And Safety Code >> Division 26. >> Part 3. >> Chapter 10.

. For the purposes of Sections 40918, 40919, 40920, and 40920.5, the designation of a district's air pollution as "moderate," "serious," "severe," or "extreme" for an area which is a receptor of transported air pollutants shall be based on violations of state ambient air quality standards which would occur without regard to the transport contribution.