Borongan reports an annual PM2.5 of 9.3 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Compared across Philippines
Borongan: 9.3 µg/m³. Typical range in Philippines: 13.7–16.8 µg/m³. Low anchor: Iligan City, 10.8 µg/m³. High anchor: Manila, 29.2 µg/m³.
331 cities tracked