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
230042goodexcellent61excellent
220046goodexcellent71excellent
210036goodexcellent61excellent
200027goodexcellent41excellent
190025goodexcellent41excellent
180021goodexcellent31excellent
170016excellentexcellent21excellent
160012excellentexcellent21excellent
150010excellentexcellent21excellent
140010excellentexcellent21excellent
130013excellentexcellent21excellent
120016excellentexcellent21excellent
110018excellentexcellent31excellent
100020excellentexcellent41excellent
090023goodexcellent41excellent
080032goodexcellent61excellent
070042goodexcellent71excellent
060040goodexcellent71excellent
050037goodexcellent61excellent
040037goodexcellent61excellent
030040goodexcellent61excellent
020056goodexcellent71excellent
010058goodexcellent81excellent
000056goodexcellent81excellent