Unhealthy air quality around Sepang is creating an additional challenge for preparations ahead of Formula 1’s return to Malaysia, where the Sepang International Circuit is due to host the Bahrain Grand Prix. Haze affecting several areas of the country, including the Sepang region and the Klang Valley, has pushed Air Pollution Index readings into unhealthy territory as work continues to prepare the circuit for the October event.
Readings have fluctuated between 160 and 180 in several areas, with the pollution linked to transboundary fires originating mainly from Kalimantan and Sumatra. The deteriorating conditions are creating concern not only for everyday activities in the region, but also for the construction work and final operational tests required before Formula 1 arrives.
The unusual event forms part of the revised 2026 Formula 1 calendar, with Sepang preparing to stage the Bahrain Grand Prix as Formula 1 returns to the Malaysian venue. Local and national authorities are closely monitoring the situation, aware that any further deterioration in air quality could make logistics more difficult and increase safety concerns for personnel working at the circuit.
Sepang preparations for F1 Bahrain GP reach around 80%
Despite the difficult environmental conditions, renovation and upgrade work at Sepang is continuing according to plan. Operations began at the start of September, with the circuit closed to the public so targeted work could be carried out on the facilities and the venue could meet the standards required by Formula One Management and the FIA.
Preparations are now approximately 80% complete. Around 500 volunteers have also been identified and are undergoing training ahead of the event, adding another important element to the operational preparations required for the Grand Prix.
The relevant authorities continue to monitor progress and have expressed satisfaction that the scheduled timetable is being respected. Work covers the track surface as well as technical areas, grandstands, facilities for the Formula 1 teams and structures intended for spectators.
The objective is to bring the entire circuit up to the standards required for a modern Formula 1 race. Temporarily closing Sepang to the public has allowed work to continue without interruption while giving organisers the opportunity to carry out the necessary inspections and tests before the event.
Sepang has a long history with Formula 1, and previous winners, circuit benchmarks and records from venues across the championship can be explored through the F1 Circuit Records & Statistics section.
Malaysia haze could require additional safety measures
Authorities and event organisers are continuing to assess the development of the haze and its potential effect on outdoor activities. If pollution readings deteriorate further, adjustments or additional protective measures could become necessary to safeguard drivers, team personnel, circuit workers and spectators.
For now, there is no indication that work at Sepang has been suspended. Preparations are continuing with the aim of ensuring that all facilities are fully operational and capable of meeting the expectations associated with an international Formula 1 event.
The situation will nevertheless test the ability of organisers to manage and adapt during the final phase before the Grand Prix. Air quality is expected to remain under constant observation in the weeks leading up to the event, particularly if particulate levels continue to remain elevated.
Air quality monitoring remains central to Sepang preparations
Specific protocols could be introduced if conditions require them, particularly measures designed to reduce prolonged exposure to outdoor air for those working around the circuit. Such precautions would become increasingly relevant if haze levels remain high while construction, operational testing and event preparation intensify.
The challenge therefore extends beyond simply completing the physical work at Sepang. Organisers must also ensure that the circuit can operate safely if environmental conditions remain difficult, while maintaining the preparation schedule required for Formula 1’s return.
Malaysian institutions, circuit management and international organisers are working together with the objective of allowing the Bahrain Grand Prix in Malaysia to take place under the best possible conditions. Their task is to ensure that the environmental challenge does not compromise the event, while demonstrating the organisational flexibility and resilience required to stage Formula 1 at Sepang once again.
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