The government has united three agencies to urgently tackle pollution in Rapeepat Canal, injecting 500,000 cubic meters of clean water daily to dilute contaminants, with expectations to clear stagnant floodwater by mid-November.
On 20 October 2026, Second Lieutenant Phatdarasmi Thongsaluaykorn, Deputy Spokesperson for the Office of the Prime Minister, reported on progress in addressing the issue. Pollution and fish deaths in Rapeepat Canal 2, Khlong Luang District, Pathum Thani Province. The Ministry of Agriculture and Cooperatives has urgently instructed three main agencies—the Royal Irrigation Department, the Land Development Department, and the Department of Fisheries—to collaborate intensively to restore water quality and mitigate impacts in the area.
Preliminary findings indicate the problem partly stems from polluted water from flooded fields draining into the canal, combined with high water levels in the Chao Phraya River, causing slow drainage and accumulated contamination. However, official water quality tests, especially dissolved oxygen levels, are pending to confirm the cause of fish deaths.
The Deputy Government Spokesperson revealed the action plan to remedy the polluted water: The Royal Irrigation Department is proceeding with injecting approximately 500,000 cubic meters of clean water daily to dilute contaminants, alongside installing water propulsion devices to enhance oxygen circulation. They are also carefully managing water intake and outflow to keep water levels at control points below +1.80 meters above mean sea level, preventing adverse effects on homes and communities.
Meanwhile, the Land Development Department has dispersed over 120,000 liters of microbial agent PD 6 to neutralize foul odors in the Khlong Song area, with production capacity increased by 20,000 liters daily to spray continuously at vulnerable spots. Meanwhile, the Department of Fisheries plans to deploy microbial agents PM 1, which treats polluted water and reduces organic matter accumulation, and PM 2, which supports water quality improvement for aquatic animal farming, to aid restoration efforts in Khlong Song and adjacent canals, starting from Friday, 23 October.
However, if no additional rainfall occurs and inflows remain within planned limits, it is expected that all stagnant floodwater in the target area will be drained by mid-November. The recovery of water quality will require ongoing monitoring to ensure appropriate problem resolution and to minimize impacts on residents and the environment.