Haze conditions across Malaysia showed signs of improvement, with fewer locations recording unhealthy Air Pollutant Index (API) levels as of the evening of September 30, 2026. According to data from the Air Pollutant Index Management System (APIMS), the number of areas reporting unhealthy air quality dropped to 18, down from 31 the previous day.

Johan Setia in Selangor registered the highest API reading at 164, followed by other Selangor locations such as Shah Alam (162), Klang (157), Petaling Jaya (154), and Banting (125). In Johor, Pengerang recorded 162, Larkin 160, Kota Tinggi 153, and Pasir Gudang 151. Kuala Lumpur’s Batu Muda and Cheras both reported readings of 160. Additional unhealthy readings were noted in Nilai (160) and Seremban (153) in Negri Sembilan; Indera Mahkota (155) and Balok Baru in Kuantan (154) in Pahang; Kuala Terengganu (152); Putrajaya (155); and Bandaraya Melaka (102). Meanwhile, 49 areas reported moderate air quality levels, and three areas in Sarawak—Sarikei, Limbang, and Miri—recorded good readings.

The Asean Specialised Meteorological Centre (ASMC) reported that dry weather prevailed across much of the southern ASEAN region on September 30, with exceptions including localized showers over parts of Peninsular Malaysia, Kalimantan, and northern and central Sumatra. Isolated hotspots were detected in southern Sumatra and parts of Kalimantan, contributing to moderate to dense transboundary smoke haze conditions in Sarawak and Kalimantan.

Air quality monitoring stations in portions of Kalimantan and southern Sumatra indicated unhealthy to very unhealthy levels due to smoke haze. Moderate to dense haze was also observed over Sumatra. The ASMC forecast that dry weather may persist over much of the southern ASEAN region in the coming days, although rain is expected in parts of Peninsular Malaysia, northern and central Sumatra, and northwestern Borneo. These wet conditions could help alleviate haze in affected areas; however, prolonged dry spells elsewhere may maintain elevated haze levels, posing ongoing risks of transboundary air pollution.

The recent improvement in air quality in some Malaysian regions comes amid these variable weather patterns and continuing hotspot activity across parts of Indonesia and Malaysia, which remain key factors influencing the haze situation. Authorities continue to monitor the situation closely as efforts to mitigate sources of transboundary haze persist.