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Haze Action Plan

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PSI Reading

The 3-hr PSI at 7 pm on 7 Nov 2002 was 53.
This is the last update for the day.

Health Advisory

The 24-hr PSI at 4 pm on 7 Nov 2002 was 39.

This put overall air quality in the ‘good’ range.
Pollutant responsible for the 24-hr PSI : Sulphur Dioxide

Pollutant24-hr Subindex at 4 pm on 7 Nov 2002PM1039Sulphur Dioxide39Ozone34Carbon Monoxide19Nitrogen Dioxide*-

( Note*: A subindex is only reported when one-hour concentration exceeds  1130µg/m3)

Current & Previous Month 24-hr PSI Readings

Click this haze_station2_small.jpg (2366 bytes) to see the schematic diagram of NEA’s Telemetric Air Quality Monitoring  & Management System

3-hr PSI update for 7 Nov 2002

&nbspTime3-hr PSI**    7 am15    8 am19    9 am23  10 am25  11 am23  12 pm25   1 pm24   2 pm30   3 pm41   4 pm51   5 pm54   6 pm55   7 pm53Note** :
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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