2024 update to Breeze Technologies‘ air quality index

At Breeze Technologies, we regularly evaluate our air quality index (AQI) based on recent scientific insights and publications from international institutions such as the World Health Organization (WHO). Our AQI is mainly developed from the CAQI (Common Air Quality Index) of the European Environment Agency EEA, extended by additional air quality parameters that do not appear in the CAQI.

During one of our our recent reviews, we noted that the ozone ratings in the CAQI was adapted based on recent publications of the WHO. Based on these changes, we also updated our AQI to better reflect the current scientific discourse. The 2024 changes only affect the parameter ozone, for which the assessment is now slightly laxer:

Rating	O3 (ug/m³) - until 31 December 2023	O3 (ug/m³) - from 1 January 2024
Timeframe	1h / 24hr	1h
Excellent	0 - 33	0 - 50
Fine	33 - 65	50 - 100
Moderate	65 - 120	100 - 130
Poor	120 - 180	130 - 240
Very poor	180 - 240	240 - 380
Severe	from 240	from 380

Besides the changes in threshold values, the 24 hour average is now formed by taking the worst value of those 24 hours, instead of averaging all values from this timeframe as before.

The changes were implemented from 1 January 2024 onwards. This is going to allow a good comparison of air quality data in the ongoing year.