In this paper, the quality of roof harvested rainwater in Dan Phuong, Phuc Tho and Ung Hoa districts, Ha Noi city was assessed. Roof-harvested rainwater were taken in 2 campaigns (November 2015 and April 2016) then analyzed according to the QCVN 01:2009/BYT. The findings showed that in the studied districts, rainwater was collected from the tile, concrete, fibro cement and metal roofing, of which tile roof is the most common one which accounted for %. | Vietnam Journal of Science and Technology 55 (4C) (2017) 109-114 ASSESSMENT OF THE ROOF - HARVESTED RAINWATER QUALITY IN SOME SUBURB DISTRICTS, HANOI, VIET NAM Nguyen Thi Ha1, *, Do Thi Nhan1, Ngo Van Anh1, Tran Van An2 1 Faculty of Environmental Science, VNU- University of Sciences, Ha Noi, 334 Nguyen Trai Street, Hanoi, Vietnam 2 Preventive Medical Center of Ha Noi, Department of Health 70 Nguyen Chi Thanh, Ha Noi, Viet Nam * Email: nguyenthiha@ Received: 1 August 2017; Accepted for publication: 20 October 2017 ABSTRACT In this paper, the quality of roof harvested rainwater in Dan Phuong, Phuc Tho and Ung Hoa districts, Ha Noi city was assessed. Roof-harvested rainwater were taken in 2 campaigns (November 2015 and April 2016) then analyzed according to the QCVN 01:2009/BYT. The findings showed that in the studied districts, rainwater was collected from the tile, concrete, fibro cement and metal roofing, of which tile roof is the most common one which accounted for %. The quality of roof-harvested rainwater in general was rather good. However, parameters including pH, permanganate value, total coliform and Ecoli did not meet the standards. The pH values obtained were almost in the basic range, of which 38/90 samples ( %) were greater than and exceeded the standard (QCVN 01:2009/BYT), only 4 samples had acidic water with pH around . For permanganate value, they ranged from to mg/L with the number of samples exceeded the permitted standard reaching 30/90 and 17/90 samples in the 1st and 2nd campaign, respectively. In the 1st campaign, the total coliforms and were detected in 75 and 72 % of the roof harvested rainwater samples, respectively; while in the 2 nd campaign these numbers were 62 and 38 %, respectively. Keywords: domestic supply water, drinking water quality, roof-harvested rainwater; suburb. 1. INTRODUCTION The demand for drinking water in rural areas has become a much concerning issue due to the lack of .
