PETALING JAYA: The air quality in Kuala Selangor and Port Klang deteriorated yesterday with air quality index (API) readings of above 100.
The API for Kuala Selangor was 125 at 11am, rising to 129 at 5pm. In Port Klang, it was 102 at both 11am and 5pm.
This was an increase from Wednesday when the API at 5pm was 98 for Kuala Selangor and 56 for Port Klang.
Both areas were put under a state of emergency last month when their API readings breached the 500-mark during the height of the haze.
Other areas had good or moderate air quality levels yesterday.
The Department of Environment said that 100 hotspots were detected in Sumatra on Wednesday while nine were detected in Kelantan, Perak, Selangor and Johor.
It said five hotspots were detected in Sabah and 15 in Sarawak while in Kalimantan, 488 were detected.
Visibility in most areas was good at above 8km except for Sri Aman which was at 4.5km. However, it improved to above 10km by 3pm.