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
16003excellentexcellent11excellent
15004excellentexcellent11excellent
14003excellentexcellent11excellent
13003excellentexcellent11excellent
12003excellentexcellent11excellent
11004excellentexcellent11excellent
10005excellentexcellent11excellent
09007excellentexcellent11excellent
080012excellentexcellent21excellent
070018excellentexcellent31excellent
060021goodexcellent41excellent
050033goodexcellent31excellent
040031goodexcellent21excellent
030025goodexcellent31excellent
020030goodexcellent31excellent
010026goodexcellent31excellent
000037goodexcellent41excellent
230035goodexcellent31excellent
220035goodexcellent21excellent
210011excellentexcellent21excellent
20004excellentexcellent11excellent
19003excellentexcellent11excellent
18003excellentexcellent11excellent
17004excellentexcellent11excellent