KUCHING: Several areas in western Sarawak are expected to be affected by transboundary haze in the near future, as satellite data indicates a surge in hotspots across the border, particularly in Kalimantan.
Sarawak Controller of Environmental Quality Datuk Jack Liam said the Natural Resources and Environment Board (NREB) is monitoring the number and location of hotspots via the Asean Specialised Meteorological Centre (ASMC) website, which is based in Singapore.
“In addition, forecasts of transboundary haze movement conducted by the Malaysian Meteorological Department (MetMalaysia) using the HYSPLIT Model allow us to predict the trajectory of smoke haze for the next 72 hours.
“Based on the latest analysis dated 21 July 2025, the smoke haze trajectory from the neighbouring country is expected to moderately affect several areas in western Sarawak during the forecast period,” he said in a statement, Friday (July 25).
He added that based on data obtained from NREB’s Air Quality Monitoring Stations along the Sarawak-Kalimantan border as of 8am, Friday, several areas have been identified as high-risk for an increase in Air Pollutant Index (API) readings in the near future.
He said Lundu recorded an API reading of 125, which falls under the unhealthy category, while Tebedu recorded a reading of 69, classified as moderate.
“These two areas have been identified as high-risk locations because most of the hotspots detected in the neighbouring country are located near these areas.”
He further said that regular patrols, especially in peatland areas that are prone to fires, as well as the enforcement of the open burning ban, have proven effective in addressing the sources of pollution.
“This success can be seen through the significant difference in the number of hotspots detected, with only 62 hotspots found in Sarawak compared to 448 in the neighbouring country during the seven-day period from July 18 to 24.”
Jack noted that NREB is also in communication with the authorities in Indonesia following the increase in hotspots in Kalimantan.
“Through the 37th Sarawak–West Kalimantan State-Level Sosek-Malindo Conference held from Nov 21 to 25 last year, the governments of Sarawak and West Kalimantan agreed to cooperate in addressing forest fires and haze issues.
“NREB also welcomes their involvement in conducting joint patrols and technical training to ensure the success of this long-term cooperation.”
Regarding the emergency action plan in the event of a sudden deterioration in air quality, he said NREB, together with relevant agencies, will disseminate up-to-date information on API readings through various channels.
