Chadchart’s plan to quell the On Nut waste odor includes preparing to close the problematic factory, with intentions not to renew the contract, dismantle the old system, and transform the area into a water retention forest and a waste sorting learning center.
On 7 May 2026, Chadchart Sittipunt, Governor of Bangkok, along with his executive team, announced progress on managing odor and smoke pollution from the On Nut waste disposal center in Prawet district. He stated that Bangkok has expedited efforts for all contractors to upgrade waste management to a fully closed system (100%) and has installed the “electronic nose” or E-nose technology to monitor real-time air quality. Over the past 16 months, monitoring showed the average odor levels in surrounding communities have clearly dropped below the standard threshold (9 D/T), with averages of only 2.44 near Imperial Village and 1.88 near Koh Loy community. Complaints have also decreased by more than 51%.
However, the Bangkok governor acknowledged that the problem has not been completely resolved. This is due to limitations in the previous contract, made before the current administration, which lacked clear penalties for odor pollution. Additionally, some factories have operated open systems from the start, allowing some odor to escape during garbage truck movements. Bangkok authorities have rigorously enforced contract terms and fined companies responsible for accumulated waste causing odors. He emphasized that although average odor levels have improved, Bangkok remains unsatisfied as there are still days when odor spikes above standards, disturbing residents.
Regarding sustainable solutions, Chadchart revealed a long-term plan in which Bangkok will not renew contracts for the 600-ton waste disposal plant expiring in 2026 or the future 1,000-ton plant. Instead, the city will adopt waste incineration technology to generate clean energy, currently testing a system capable of burning 400 tons daily. The former factory site will be converted into green space, water retention areas, and planted with trees to form an "odor barrier." It will also be developed into a waste sorting learning center and a public exercise park for community use.
Additionally, Chadchart addressed criticism from a People's Party MP regarding Bangkok's waste management efforts. He expressed gratitude for the feedback and concern from the public, stating that the city sincerely accepts the advice and is working seriously to improve. He affirmed that many improvements have already been made, significantly better than at the start, and that the administration remains open to all suggestions to continuously enhance the quality of life for Bangkok residents in line with the comprehensive waste management strategy.