The Investigation And Control Standards Research Of Residential Indoor Air Quality In Four Cities Of China

Based on the scale of current urban residential and the importance of indoor air quality at homes, the problem of indoor air pollution of four cities in China was studied in this paper.From July 2003 to April 2004, more than forty homes in Beijing, Shanghai, Wuhan and Changsha were choosed to investigate on site by indoor air quality testing group formed by our lab mates, and then 1857 effective sample data of various indoor air pollutants were available. Through random questionnaire investigation and indoor field measurements, the superstandard state of classified indoor contaminants in four cities mentioned above was obtained as follows: formaldehyde, 64 percent above norm averagely, is the most severe contaminant followed by radon which is 58.7 above norm. The study provides us aims and guides us directions in future research.Based on the field measurements and questionnaire, and through the analysis of the data and background, the characteristics of indoor air pollution in cities with typical climate in China was found; also the influencing factors of indoor air quality is analyzed; then, the way to control the indoor environmental pollutants and to improve the technical research is further brought forward. The indoor air quality standards of other 12 countries were mentioned in the proceeding, which provide us with reference and evidence. The indoor air pollution can be restrained from source through the establishment of Indoor Air Quality Standard, which is one of the focal points in the research. As different standard of indoor contaminants concentration limits in different countries, not only the condition of scientific research but also that of the economy and politics in the countries needs to be considered. The indoor contaminant level was obtained on the basis of our IAQ investigation, and some fundamental researching support and proposal were given to the establishment of National Indoor Air Quality Standard through the combination of toxicology, epidemiology, residential indoor air quality standards and management institutions home and abroad with above investigation.