Guangdong, Hong Kong and Macao jointly released today (Oct. 23) a report on air quality in 2025 under the Guangdong-Hong Kong-Macao Pearl River Delta Regional Air Quality Monitoring Network, which indicates a long-term downward trend of the concentrations of various air pollutants, namely sulphur dioxide, nitrogen dioxide, carbon monoxide, respirable suspended particulates and fine suspended particulates. Compared with 20 years ago, the 2025 annual average concentrations for these parameters have declined by between 23 per cent and 86 per cent (shown in Annexes 1 and 2). Among these, fine suspended particulates concentration dropped to 19 μg/m³, reaching a leading level nationwide. This reflects the effectiveness of the emission reduction measures implemented by the three places in improving air quality across the Pearl River Delta region.
Over the past few years, the governments of Guangdong, Hong Kong, and Macao have introduced various policy measures and co-operated to improve regional air quality. For Hong Kong, the Hong Kong Special Administrative Region (HKSAR) Government has continued to implement various air pollutant emission control measures covered in the Hong Kong Roadmap on Popularisation of Electric Vehicles (EVs), the Clean Air Plan for Hong Kong 2035, the Hong Kong's Climate Action Plan 2050 and the Green Transformation Roadmap of Public Buses and Taxis on marine and land transport, power plants and non-road mobile machinery to enhance air quality. Also, the Updated Version of the Hong Kong Roadmap on Popularisation of EVs, announced in February 2026, updates the strategies and measures for promoting the popularisation of EVs. In addition, the Air Pollution Control (Amendment) Ordinance 2025 came into effect in April, 2025, updating a number of air quality objectives (AQOs). Among the 15 updated AQOs, seven are set at the most stringent levels of the World Health Organization Global Air Quality Guidelines, which are on par with those of other advanced economies.
(Source: ISD)
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