Investigation on Indoor Air Quality after Decoration in Jingmen City

[Objective]To understand the indoor air pollution after decoration in Jingmen City[Methods]Totally 70 houses which were decorated within 12 months during 2006—2008 were selected, the formaldehyde and ammonia concentration of indoor air were detected.[Results]Ammonia were not detected in all air samples, the over standard rate of formaldehyde was 72.56%. The over standard rate of formaldehyde in bedroom, study room and living room was 85.91%, 80.00%, 48.57%, respectively, proved by χ2 test, the differences were significant between them(P0.01).We also collected air samples within 3 months after decoration,89.01% of them exceed the recommended concentration of formaldehyde.And samples from 3 months to 6 months and from 6 months to 12 months,66.67% and 49.12% of them exceeded the recommended concentration respectively,the differences were significant between them(P0.05).[Conclusion]House decoration causes indoor air pollution, especially for formaldehyde. The difference of formaldehyde over standard rate between different rooms was significant in terms of room function; and the formaldehyde concentration decreased with time lapse.