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
060025goodexcellent31excellent
050030goodexcellent41excellent
040031goodexcellent51excellent
030031goodexcellent61excellent
020034goodexcellent41excellent
010032goodexcellent51excellent
000038goodexcellent51excellent
230028goodexcellent51excellent
220027goodexcellent41excellent
210026goodexcellent31excellent
200018excellentexcellent31excellent
190020excellentexcellent31excellent
180019excellentexcellent21excellent
170016excellentexcellent21excellent
160014excellentexcellent21excellent
150010excellentexcellent21excellent
140019excellentexcellent31excellent
130025goodexcellent41excellent
120011excellentexcellent21excellent
110030goodexcellent51excellent
100042goodexcellent71excellent
090048goodexcellent91excellent
080053goodexcellent91excellent
070048goodexcellent71excellent