Radon in China
Official radon data, regulations and resources
National reference level
300 Bq/m³
Competent authority
China CDC / Ministry of Ecology and Environment
What should you do?
Regardless of the official classification, the only way to know the radon level in a specific building is to measure it. A long-term test (at least 3 months) is recommended. You can either test yourself with passive detectors or hire a certified professional.
Regulations & obligations
Dwellings
National standard GB/T 18883-2022: maximum acceptable level 300 Bq/m³ for indoor radon (annual average).
Workplaces
Building technical standard GB 50325 establishes 300 Bq/m³ for interiors. No distinction made between homes and workplaces in public regulations.
Professional services
Qualified Testing Agencies
Government-certified organizations for indoor air quality testing including radon under GB 50325
Radon Measurement Companies
Private companies specializing in radon concentration measurement in residential and commercial buildings
Government-Affiliated Laboratories
Government research institutions under provincial or municipal environmental bureaus for radon monitoring
How to test for radon yourself
Regardless of where you live, testing for radon is easy and affordable. A long-term measurement with passive detectors is the most reliable way to know your indoor radon level.
Learn how to testMajor Cities
Shanghai
24,874,500 inhabitants
Chongqing
22,000,000 inhabitants
Chengdu
20,937,757 inhabitants
Beijing
18,960,744 inhabitants
Guangzhou
18,676,605 inhabitants
Shenzhen
17,494,398 inhabitantsHigh (geology estimate)
Tianjin
13,866,009 inhabitants
Wuhan
13,739,000 inhabitants
Xi’an
12,952,907 inhabitants
Hangzhou
11,936,010 inhabitants
Harbin
10,009,854 inhabitants
Dongguan
9,644,871 inhabitants
Hefei
9,465,881 inhabitants
Weifang
9,386,705 inhabitants
Nanjing
9,314,685 inhabitants
Shenyang
9,070,093 inhabitants
Foshan
9,042,509 inhabitants
Jinan
8,352,574 inhabitants
Dalian
7,450,785 inhabitants
Wuzhong
7,202,654 inhabitants