What are you measuring?
http://www.epd-asg.gov.hk/
What are you measuring?
http://www.epd-asg.gov.hk/
Here, more info as of 10am:
http://www.epd-asg.gov.hk/english/24..._Long_fsp.html
http://www.epd-asg.gov.hk/english/24...Chung_fsp.html
http://www.epd-asg.gov.hk/english/24...ntral_fsp.html
YL and TC has relatively higher Ozone, SO2, Carbon Monoxide
Central has higher concentration for CO2
Last edited by Creative83; 18-10-2012 at 11:29 AM.
I see I picked a good day for riding to work..
I work in Tuen Mun and the smog has been terrible here this week. Its not just an HK island problem.
I was looking at the PM2.5 measurements, primarily, which the government releases quietly but does not incorporate into their API readings (at this time). I was then assessing those PM2.5 measurements against World Health Organization standards, which showed we were at something like 250% of the maximum in Tung Chung and 211% of the maximums in Central.
Central's current pollutant is Nitrogen Dioxide, whereas Tung Chung is PM2.5. The WHO standards for nitrogen are not as strict as PM2.5, so you get a situation where by the API Central is higher with NO2, but when you factor in PM2.5 Tung Chung has a higher W.H.O. score (because the HK API calculations are absent PM2.5, for the moment). Gets a bit apples and oranges though at times.
It is worth noting that for PM2.5 and PM10, the standards are based on a 24-hour average, so the heavier pollution from yesterday can affect the scores. So while the Tung Chung PM2.5 is currently at 258% of the maximums on a 24 hour basis, if you look at it on a one-hour 'spot' reading we are only at 210% of the maximums. In fact, in about three or four hours, the PM2.5 24-hour average readings for Tung Chung should drop significantly as a 'spike' from yesterday afternoon is factored out of the equation.
Here is the app I made for this. One day I'll finish the Android version:
https://itunes.apple.com/us/app/hong...6152?ls=1&mt=8
Last edited by penguinsix; 18-10-2012 at 11:56 AM.
Agree about the buses. Why aren't they all switched over to LPG, surely the Govt. could give incentives to switch over like the taxis and mini-buses?
Also give much lower vehicle tax banding for big trucks that are converted to LPG.
The government PM2.5 figures are on the links provided by Creative83. They call PM10 'RSP' and PM2.5 'FSP'