Alaska Administrative Code
Title 18 - Environmental Conservation
Chapter 50 - Air Quality Control
Article 2 - Program Administration
18 AAC 50.245 - Air quality episodes and advisories for air pollutants other than PM-2.5

(a) The department or a local air quality control program may declare an air quality episode and prescribe and publicize curtailment action if the concentration of an air pollutant in the ambient air has reached, or is likely in the immediate future to reach, any of the concentrations established in Table 6 in this subsection. . Table 6 Concentrations Triggering an Air Quality Episode for Air Pollutants Other Than PM-2.5 Episode Type Air Pollutant Concentration in micrograms per cubic meter {and in ppm where applicable} Air alert Sulfur dioxide 365 (24-hour average) §0.14 ppm} PM-10 150 (24-hour average) PM-10 from wood 92 (24-hour average) burning (wood smoke control areas) Carbon monoxide 10,000 (8-hour average) §8.7 ppm} Air warning Sulfur dioxide 800 (24-hour average) §0.31 ppm} PM-10 350 (24-hour average) Carbon monoxide 17,000 (8-hour average) §15 ppm} Air emergency Sulfur dioxide 1,600 (24-hour average) §0.61 ppm} PM-10 420 (24-hour average) PM-10 from wood During an air alert, a burning (wood smoke concentration measured or control areas) predicted to exceed 92 (24-hour average), and to continue to increase beyond the concentration that triggered the air alert Carbon monoxide 34,000 (8-hour average) §30 ppm}

(b) The department or a local air quality control program will declare an air quality advisory if, in its judgment, air quality or atmospheric dispersion conditions exist that might threaten public health.

(c) f the department or a local air quality control program declares an air quality advisory under (b) of this section, the department or a local air quality control program will

(d) Nothing in this section alters a local government's powers or obligations under a local air quality control program established under AS 46.14.400 and other local laws, as applicable.