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PSI Reading
The 3-hr PSI at 3 pm on 25 Oct 2002 was 48.
Health Advisory
None
The 24-hr PSI at 4 pm on 24 Oct 2002 was 62.
This put overall air quality in the ‘moderate’ range.
Pollutant responsible for the 24-hr PSI : PM10.
( Note*: A subindex is only reported when one-hour concentration exceeds 1130µg/m3)
Current & Previous Month 24-hr PSI Readings
Click this 
to see the schematic diagram of NEA’s Telemetric Air Quality Monitoring & Management System
3-hr PSI update for 25 Oct 2002
 Time3-hr PSI** 7 am51 8 am53 9 am55 10 am53 11 am49 12 pm42 1 pm38 2 pm44 3 pm48 4 pm 5 pm 6 pm 7 pmNote** :
Hourly updates of 3-hr PSI Readings are provided from 7am to 7pm.
The readings are calculated based on PM10 concentrations only.
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