December 16th, 2011:

DIABOLICAL ! PM2.5 (RESPIRABLE SUSPENDED PARTICULATE MATTER LESS THAN 2.5 MICRONS IN DIAMETER)

Clear the Air now reveals the ambient PM2.5 levels in Hong Kong’s air – district by district (in micrograms per cubic meter of air)

(excluding the roadside measurements which are even worse)

The US EPA has legal Standards on PM2.5 which are: 24-hour fine particle standard 35 µg/m3 and  annual fine particle standard 15 µg/m3

The HK EPD is examining this data to try and establish the sources of the pollution i.e.

Is it mainly Transboundary / Shipping / local Vehicular / Construction ? – no doubt they will eventually tell us.

Meanwhile we have to breathe this lethal muck whilst our Government prevaricates.

PM2.5 enters into the lungs without hindrance by nose hairs or tracheal cilia.

One must query how the HKZM bridge managed to pass its Environment Impact Assessment given the data of the lethal PM2.5 ambient levels in Tung Chung already.

Well, watch this space ! Clear the Air has received a brand new Dust Trak II particulate sensor so we will be taking roadside PM2.5 measurements in January 2012 and revealing the true roadside levels on our site for the World to see.

Download PDF : PM2 5 Allstns (2011) Middleton