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
000041goodexcellent51excellent
230038goodexcellent51excellent
220037goodexcellent51excellent
210029goodexcellent31excellent
200026goodexcellent31excellent
190023goodexcellent31excellent
180028goodexcellent31excellent
170025goodexcellent31excellent
160024goodexcellent31excellent
150022goodexcellent21excellent
140020excellentexcellent21excellent
130022goodexcellent21excellent
120018excellentexcellent21excellent
110024goodexcellent41excellent
100030goodexcellent41excellent
090022goodexcellent41excellent
080025goodexcellent41excellent
070031goodexcellent51excellent
060036goodexcellent51excellent
050035goodexcellent41excellent
040032goodexcellent51excellent
030032goodexcellent61excellent
020036goodexcellent51excellent
010036goodexcellent51excellent