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
030027goodexcellent51excellent
020019excellentexcellent51excellent
010025goodexcellent61excellent
000026goodexcellent51excellent
230020excellentexcellent41excellent
220017excellentexcellent31excellent
210010excellentexcellent21excellent
20006excellentexcellent11excellent
19006excellentexcellent11excellent
18005excellentexcellent11excellent
17005excellentexcellent11excellent
16004excellentexcellent11excellent
15005excellentexcellent11excellent
14006excellentexcellent11excellent
13009excellentexcellent21excellent
12007excellentexcellent21excellent
11007excellentexcellent11excellent
100011excellentexcellent21excellent
090017excellentexcellent41excellent
080021goodexcellent61excellent
070027goodexcellent51excellent
060019excellentexcellent31excellent
050016excellentexcellent41excellent
040018excellentexcellent31excellent