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Past 24 Hours Pollutant Concentration Summary

Yuen Long
Date TimeNO2O3SO2COPM10PM2.5
2021-09-18 04:0029.763.19.1906.546.138.2
2021-09-18 03:0041.361.88.8979.951.843.1
2021-09-18 02:0050.965.59.11,054.351.241.8
2021-09-18 01:0058.355.69.11,072.655.045.6
2021-09-18 00:0060.263.19.31,069.651.642.3
2021-09-17 23:0053.663.89.41,072.054.343.7
2021-09-17 22:0080.837.39.61,119.055.244.4
2021-09-17 21:00106.429.69.71,249.959.147.8
2021-09-17 20:00104.872.410.21,122.555.042.8
2021-09-17 19:00108.0104.610.21,060.752.238.4
2021-09-17 18:00115.589.610.2980.352.537.1
2021-09-17 17:0090.7110.59.9898.238.526.9
2021-09-17 16:0091.259.69.2901.731.023.0
2021-09-17 15:0070.867.48.7857.416.312.6
2021-09-17 14:0054.775.88.5773.430.123.6
2021-09-17 13:0055.9152.910.0934.956.542.3
2021-09-17 12:0060.4167.311.0999.355.140.2
2021-09-17 11:0065.193.011.1993.551.938.7
2021-09-17 10:0065.558.811.8993.256.442.5
2021-09-17 09:0070.425.910.8991.040.828.0
2021-09-17 08:0058.18.810.0993.430.221.5
2021-09-17 07:0047.80.89.3989.924.417.1
2021-09-17 06:0046.52.49.1902.623.817.4
2021-09-17 05:0049.92.49.2853.522.216.1
Remarks:

(1) Time shown is in Hong Kong time.

(2) NO2 - nitrogen dioxide, O3 - ozone,
     SO2 - sulphur dioxide, CO - carbon monoxide,
     PM10 - respirable suspended particulates,
     PM2.5 - fine suspended particulates

(3) Concentration shown is in µg/m3.

(4) The pollutant concentration is based on real time data taken directly from EPD's Air Quality Monitoring Network.