Based on the common formula temperature & dewpoint recorded realtime from this weather station to calculate an estimated height of the cloudbase.It is not a accurate tool it is a relative indicator.
Measured in feet or meters. Information on Cloudbase

0-50 GOOD

51+ MODERATE

101+ Unhealthy for Sensitive Groups

151+ Unhealthy (Precautions Required)

201+ Very Unhealthy (Critical Conditions)

301+ Hazardous (Life Threatening)

Information on Air Quality