At least for today, Metro Manila residents can enjoy the cooler breeze outdoors sans the threat of polluted air.
All four monitoring stations of the Rotary Club of Makati air quality monitoring system in Metro Manila registered air quality rated from good to very good at 2:00 this afternoon.
Accordingly, no precautionary health advisories were issued.
The Lung Center station in Quezon City registered the best air quality among the four stations. At 2pm, its air quality was rated “very good” with a reading of just 4 micrograms per cubic meter (ug/m3) for fine particulate matters measuring 2.5 microns or less (PM2.5).
This is well within WHO’s 25 ug/m3 safe air ceiling for PM2.5. For the coarser PM10 the safe ceiling is 50ug/m3. PM2.5 poses a greater health risk as the fine dust can be ingested and lodge in the lungs.
UST-Espana, which usually has the dirtiest air among the four stations, had air rated “good” quality. The readings were 25ug/m3 for PM10 and 12ug/m3 for PM2.5, which are all within the safe standard.
Ayala had the second best air quality with readings at 21 and 9 ug/m3 for PM10 and PM2.5, respectively. This was followed in third place by EDSA-Muñoz at 47 and 15 ug/m3 for PM10 and PM2.5 respectively.
Air quality is monitored continuously day and night 24/7 with readings and health advisories available to the public through the system’s Internet website airtoday.ph and Android app. The advanced Germany-made instruments transmit data wirelessly to a server for analysis and distribution.
Experts say that air pollution in Metro Manila mainly comes from tailpipe emissions. Good air quality is therefore unusual considering heavy vehicular traffic anytime of the day.
Eddie H. Yap, Makati Rotary president for RY 2015-2016 and project manager welcomes the positive news.
“We are fortunate that a large part of Metro Manila has a relatively flat topography bounded by two large bodies of water on both sides. The occasional strong breeze and monsoon-induced winds that blow through help clear the polluted air.
We will look at factors that contributed to cleaner air today. The bright warm mid-afternoon sun and brisk wind condition could have contributed to the better air quality” he said.