Mandaue City reported alarming air quality levels in Metro Cebu, attributed primarily to local pollution sources instead of transboundary smoke haze from Indonesia. The Environmental Management Bureau 7 (EMB-7) recorded an Air Quality Index (AQI) of 165 on a recent Friday morning, classifying the air quality as 'very unhealthy.' This indicates a significant concern for public health, especially for vulnerable populations.
The EMB-7 highlighted that vehicle emissions, industrial activities, and other local sources have significantly raised the concentrations of fine particulate matter (PM2.5) in the air. It clarified that no evidence of pollution patterns from Indonesian wildfires was found, reinforcing that the current poor air quality is a local concern rather than a result of international pollution.
Meteorological conditions, particularly low ambient temperatures from nighttime to early morning, have contributed to the accumulation of these harmful particles. During this period, the monitoring data revealed that PM2.5 concentrations tend to increase, indicating a direct correlation between cooler temperatures and pollution levels.
The EMB-7 also observed rising levels of PM10 in the hours leading up to midnight from October 1 to 7, mirroring trends noted for PM2.5. While PM10 levels remained within the health guideline of 150 micrograms per cubic meter, the bureau issued warnings that elevated PM2.5 levels could persist in the immediate future due to ongoing local emissions, alongside adverse weather conditions that encourage pollutant buildup.
Adding to the situation, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) recently declared the end of the southwest monsoon, leading to a high-pressure system over East Asia. EMB-7 noted that localized rain showers could provide some relief by dispersing pollutants from the atmosphere.
In contrast, a monitoring station in Barangay Cabitoonan, Toledo City, reported an AQI of 15, classified as 'good,' at the same time as Metro Cebu's severe readings. This highlights stark differences in air quality across different areas within the region.
To mitigate health risks, EMB-7 has advised residents to avoid heavy traffic zones and for individuals with respiratory ailments, such as asthma, to stay indoors as much as possible. They also recommended postponing unnecessary travel and limiting vehicle usage to reduce further emissions. Additionally, the bureau urged the public to wear effective face masks, such as N95 or KN95, to minimize exposure to harmful fine particulate matter.
This concerning air quality situation in Metro Cebu has seen notable fluctuations, with a previous AQI reading of 252 observed on September 3, categorized as 'acutely unhealthy.' This was a significant point in historical monitoring, reflecting persistent air quality issues in the area.