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
040023goodexcellent11excellent
030023goodexcellent11excellent
020021goodexcellent11excellent
010027goodexcellent11excellent
000025goodexcellent21excellent
230033goodexcellent21excellent
220032goodexcellent31excellent
210030goodexcellent41excellent
200033goodexcellent41excellent
190025goodexcellent31excellent
180049goodexcellent41excellent
170031goodexcellent31excellent
160021goodexcellent21excellent
150020excellentexcellent21excellent
140015excellentexcellent21excellent
130015excellentexcellent21excellent
120011excellentexcellent21excellent
110014excellentexcellent21excellent
100012excellentexcellent21excellent
090025goodexcellent21excellent
080018excellentexcellent21excellent
070016excellentexcellent21excellent
060014excellentexcellent11excellent
050012excellentexcellent11excellent