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SCMP Editorial

Editorial | New cameras can help tackle scourge of dripping air conditioners

AI technology and stricter enforcement will be central to combating the nuisance, which can also pose a danger to public health

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Air conditioners are seen on the side of a residential building in Wan Chai on August 27. Photo: Sam Tsang

Air conditioners have made living in Hong Kong’s high-rise compact units much more pleasant during the hot summer months. However, the comfort may also become a nuisance to others, with the cooling devices in some neighbourhoods dripping like a rainforest. This is not helped when enforcement against the offence remains slack.

The severity of the matter is reflected in the rising number of complaints against dripping air conditioners, up from 25,889 in 2022 to 31,135 in 2023 and 34,742 last year. The first seven months of this year have already seen another 18,480 complaints, making a case for stronger enforcement. As many as 300 key locations were identified for action around the city, as well as 30 black spots that caused greater nuisance to the public, such as bus stops.

It is good that the government has sought to overcome the challenges in enforcement by using night-vision cameras to detect dripping from high-rise buildings in the evenings. Between May and August 24, some 5,200 cases were settled with the help of cameras and other inspection and enforcement measures, according to the Food and Environmental Hygiene Department.

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First- and second-generation cameras already enable officers to manually track sources of dripping up to 20 storeys and 40 storeys, respectively. Authorities hope to apply the use of artificial intelligence in the third-generation device by next year.

Dripping air conditioners are not only an environmental nuisance; they also pose a danger when people step onto busy roads to avoid getting wet. The surface water created can play host to bacteria and pose a public health risk. With just a few thousand nuisance notices issued and a small number of prosecutions, much more can and should be done.

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The Post initiated a series of special reports on the worsening problem 10 years ago, with an editorial dubbing it “a stain on our image unworthy of Asia’s self-proclaimed world city”. It is regrettable that the issue has seemingly not been handled with a greater sense of urgency until recently. It is hoped that the use of new technology will make enforcement more effective.
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