There is weired problem with the data from AirVisual and World Air Quality Index. For the same location and the same the values are different: 53 moderate vs 32 good. Both are using the same station: Chur A13 and CHI (Luftqualitätsindex (AQI) für Chur A13 und Luftverschmutzung in Chur | IQAir and Luftqualitätsindex (AQI) für Chur A13 und Luftverschmutzung in Chur | IQAir). Both are using the same scale: US EPA, Any idea how to fix this? Thank you.