Air quality index [µg/m3]:
excellent ≤ 12
good ≤ 36
lightly polluted ≤ 60
moderately polluted ≤ 84
heavily polluted ≤ 120
severely polluted > 120
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
1400133severely pollutedgood311excellent
1300128severely pollutedgood281excellent
1200114heavily pollutedgood251excellent
110096heavily pollutedgood211excellent
100089heavily pollutedgood191excellent
090087heavily pollutedgood171excellent
0800104heavily pollutedgood171excellent
070088heavily pollutedgood171excellent
060090heavily pollutedgood171excellent
050094heavily pollutedgood171excellent
0400100heavily pollutedgood171excellent
0300104heavily pollutedgood191excellent
0200117heavily pollutedgood191excellent
0100125severely pollutedgood181excellent
0000156severely pollutedgood191excellent
2300130severely pollutedgood191excellent
2200128severely pollutedgood181excellent
2100109heavily pollutedgood171excellent
200094heavily pollutedgood161excellent
190085heavily pollutedgood161excellent
180087heavily pollutedgood141excellent
170073moderately pollutedgood131excellent
160061moderately pollutedexcellent121excellent
150062moderately pollutedexcellent121excellent