Investigation of Formaldehyde in Indoor Air in Anhui Province During 2004-2008

Objective To understand formaldehyde pollution in indoor air and provide evidences for revising the Hygienic Standard for Formaldehyde in Indoor Air.Methods Formaldehyde monitoring data were collected from 2004 to 2008,and different types of room were selected for on-site monitoring formaldehyde concentration.Results The total average value of formaldehyde concentration was 0.139 mg/m3 during 2004-2008.The mean degree of formaldehyde concentration was 0.062 mg/m3 in urban offices,and the mean degrees in urban residential kitchens and bedrooms were 0.029 mg/m3 and 0.028 mg/m3,respectively.The value from town residents in the residential kitchens and bedrooms were 0.034 mg/m3 and 0.036 mg/m3,respectively.Formaldehyde concentration from decorated room within one year was significantly higher than that in more than one year(P0.01).Conclusion Decoration is the main reason for increasing the concentration of formaldehyde in indoor air;the results of the investigation provide a basis for the revision of hygienic standard for formaldehyde in indoor air.