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
210026goodexcellent21excellent
200024goodexcellent41excellent
190030goodexcellent51excellent
180033goodexcellent51excellent
170033goodexcellent51excellent
160037goodexcellent51excellent
150043goodexcellent41excellent
140051goodexcellent31excellent
130054goodexcellent31excellent
120057goodexcellent31excellent
110029goodexcellent31excellent
100026goodexcellent31excellent
090021goodexcellent41excellent
080035goodexcellent71excellent
070032goodexcellent61excellent
060032goodexcellent51excellent
050036goodexcellent61excellent
040038goodexcellent51excellent
030031goodexcellent41excellent
020028goodexcellent41excellent
010021goodexcellent31excellent
000014excellentexcellent21excellent
230018excellentexcellent21excellent
220028goodexcellent21excellent