At present, the control standards of radioactive materials in the indoor environment is basically sound, our country is mainly used to control radioactive materials to the control room. The following criteria may determine whether the indoor environment of radioactivity exceeded: 1. "Radon concentration in the control standards" (GB / T16146-1995) This standard specifies the air within the housing radon concentration control standards. This standard applies to public residential housing (including underground space as a shelter). It does not apply to non-residential building and underground construction ground. Standards: the housing has been built in Nanjing Yuhuatai residential formaldehyde detection, remedial action could be considered simple to control radon exposure, so that the annual average radon equilibrium equivalent concentration of housing does not exceed 200Bq / m3; for new housing, Xuanwu District, Nanjing should be controlled residential formaldehyde testing, so that the annual average radon equilibrium equivalent concentration of housing does not exceed 100Bq / m3 in the design and construction time. PM2.5 cause respiratory obstruction or inflammation research shows that Nanjing Shimonoseki area residential formaldehyde detection, particulate matter 2.5 microns or less, 75% is deposited in the alveoli. We can imagine, his eyes into the sand formaldehyde detection, eye become inflamed. Deep in the respiratory system, is also a sensitive environment, fine particles as a foreign body in the respiratory system of long-term stays, will also make the respiratory system irritation. In recent years, more and more people suffering from respiratory diseases, and getting younger and younger ages, and some patients had to first check a very serious level, the overall situation is worrying. The atmosphere in the presence of solid or liquid particles of toxic pollutants are mainly of gas, dust and mixed with pathogenic microorganisms, these aerosols can be inhaled, causing direct damage to organs or pathogenic microorganisms into the body to cause disease. Nanjing Jianye residential formaldehyde detection, good new Plaza environmental testing, detection of formaldehyde by Nanjing Nanjing good new environment Detection Technology Co., Ltd. Yi. Good New Plaza Nanjing Environmental Monitoring Technology Co., Ltd. (www.hxy880.com) is Nanjing, leading environmental monitoring equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. New Plaza in good environmental testing leadership with the staff warmly welcome all inquiries negotiations to create a good environment testing new Yat better future.