Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
120044goodexcellent61excellent
110042goodexcellent51excellent
100038goodexcellent31excellent
090048goodexcellent51excellent
080042goodexcellent41excellent
070033goodexcellent31excellent
060029goodexcellent31excellent
050033goodexcellent51excellent
040033goodexcellent51excellent
030037goodexcellent51excellent
020038goodexcellent51excellent
010037goodexcellent51excellent
000041goodexcellent51excellent
230038goodexcellent51excellent
220037goodexcellent51excellent
210029goodexcellent31excellent
200026goodexcellent31excellent
190023goodexcellent31excellent
180028goodexcellent31excellent
170025goodexcellent31excellent
160024goodexcellent31excellent
150022goodexcellent21excellent
140020excellentexcellent21excellent
130022goodexcellent21excellent