Air quality, from relatively good to extremely unfavorable

According to data from air quality index of the Government of the Canary Islands, in the mobile station of Los Llanos, concentrations of sulfur dioxide of less than 201 micrograms per cubic meter of air have been registered during the first 5 hours of this Wednesday, with which the air quality was reasonably good.
Between 5 and 7 o'clock the concentration of sulfur dioxide has dropped, so that the air quality was good, to be reasonably good between 7 and 8 o'clock, regular between that hour and 10 o'clock and unfavorable from 10 to 12 hours.
Regarding the PM10 particles, the concentration did not exceed 40 microparticles per cubic meter of air until 8 o'clock, so that the air quality has been between good and reasonably good in that period, to go unfavorable between 8 and 9 o'clock.
Air quality has worsened due to the presence of PM10 particles at 9 o'clock, since between that hour and the next its concentration has reached 121, very unfavorable, and in the next two hours it has been 382 and 230, extremely unfavorable. , since from 151 it is passed to that qualification.
Regarding PM2.5 particles, air quality has been reasonably good until 8 am, when it has started to regulate until 10 am, and is very unfavorable between 10 and 11, and then to regulate the next hour.