The Food and Environmental Hygiene Department issued about 8,100 nuisance notices over air-conditioner dripping in the first nine months of 2026, about four times the same-period total in 2023. More than 99% of households that received notices had dealt with the problem, the department said.
The department focused on about 300 locations with more serious dripping problems, including bus stops, minibus stops and pedestrian walkways, and inspected each at least once a week. By August, about half had been resolved or had clearly improved, it said.
As conditions improved at some locations, the department added more than 110 sites with less serious problems. The total number under watch had grown to more than 400 by 30 September.
A third-generation detection system is in use across all districts, combining infrared night vision and AI image recognition to locate dripping. The department said infrared technology lets staff find the source in low light without entering residents’ homes.