" All polltant concentrations are daily average (10 a.m. yesterday - 9 a.m. today).
AQI is based on the 24 hours running average, calculated at 09.00 hrs today."

on 21-Nov-09
Site Location SO2 NO2 CO (1hr) CO (8hr) Ozone PM 10 AQI
Bang Khunthien General 1.0 17.0 0.5 0.5 14.0 35.3 44.0
Din Daeng Roadside 5.0 56.0 1.0 1.1 7.0 72.5 70.0
Huai Khwang General 4.0 32.0 0.7 0.7 24.0 33.5 63.0
Intrapituk Roadside 6.0 43.0 0.8 0.8 15.0 27.7 48.0
Klong Chan General 5.0 22.0 1.0 1.0 28.0 37.5 73.0
Lad Phrao Roadside 6.0 29.0 1.0 1.1 14.0 24.6 34.0
Thai Meteorological Department(Bangna) General 0.0 21.0 0.8 0.8 12.0 38.2 48.0
Yannawa General 4.0 32.0 0.5 0.5 30.0 44.8 71.0
Standard 120 * * * * 120


Note
SO2 units : ppb (1/1,000,000,000)
NO2 units : ppb (1/1,000,000,000)
CO units : ppm, 1/1,000,000
Ozone units : ppb, 1/1,000,000,000
PM10 units : µg/m3

 AQI: Air Quality Index (AQI) should not exceed 100
     * : 24 hour average of ambient standard value not available.

Monthly and Annual Report on Ambient Air Quality in Thailand can be obtain from www.aqnis.pcd.go.th


Regional Air Quality Data
Last Modified: 08-Jun-09 at 11:18 AM