Pasir Gudang:Pasir Gudang in Johor recorded a very unhealthy Air Pollutant Index (API) reading of 207 as of 9 am, marking the highest level in the country. Additionally, 30 other areas across Malaysia reported unhealthy API readings.

According to BERNAMA News Agency, the Department of Environment's Air Pollutant Index Management System (APIMS) listed several areas with unhealthy air quality. These include Johan Setia with an API of 185, Klang at 181, Petaling Jaya at 173, Shah Alam at 171, Banting at 169, and Kuala Selangor at 155.

In Johor, other affected areas include Larkin with a reading of 194, Pengerang at 177, Batu Pahat at 172, Kluang at 171, Kota Tinggi at 164, Tangkak at 163, and Segamat at 160. Negeri Sembilan saw Nilai at 189, Seremban at 181, and Port Dickson at 172. Melaka recorded Bandaraya Melaka at 179, Bukit Rambai at 178, and Alor Gajah at 172. In Pahang, Temerloh had a reading of 155, Rompin was at 152, and Jerantut at 122.

In Kuala Lumpur, Batu Muda reported a reading of 170 and Cheras 168, while Putrajaya registered 174. Perak saw Seri Manjung at 169, Tanjung Malim at 162, Pegoh at 154, and Tasek, Ipoh at 151. In Sabah, Tawau recorded an unhealthy API of 152.

Meanwhile, 37 areas recorded moderate API readings. A reading of zero to 50 is classified as good, 51 to 100 as moderate, 101 to 200 as unhealthy, 201 to 300 as very unhealthy, and readings above 300 are deemed hazardous.