Air quality mostly good

Clear skies: The air quality in Klang was improved.

PETALING JAYA: While air quality in most areas nationwide remained “good” and “moderate”, the Air Pollutant Index (API) in Sungai Petani hit “unhealthy” levels yesterday.

The API readings there reached 106, which falls under the “unhealthy” category, before improving to 97 later in the day.