Objective To analysis the monitoring results of 4 types of drinking water from northwest urban area of Beijing in recent 3 years,to find out the problems and to eliminate the potential dangers in time.Methods Water samples were gathered from 20 units in northwest urban area of Beijing from 2009 to 2011 for periodical inspection according to relevant standard methods.Results The total qualified rate of 50 drinking water samples was 50.00%.All bottled natural mineral water and general drinking water samples were qualified.The qualified rate of bottled purified water for drinking was only 36.67%.None of the fine drinking water sample was qualified.The unqualified indicators of bottled purified water were: pH value,electrical conductivity,consumption of potassium permanganate,chloride,total bacteria,molds and yeasts.The unqualified indicators of fine drinking water were: chromaticity,pH value,total hardness,iron,sulfate,oxygen consumption,lead and total bacteria.66.67% of bottled purified water for drinking were the overrun of pH value,and the highest value detected was pH 8.48,which was 1.2 times of the upper limit of the national standard.Conclusion The qualified rates of bottled purified water for drinking and fine drinking water were very low in northwest urban area of Beijing during recent 3 years.The common problems of the two types of drinking water were the overrun of pH value,oxygen consumption and total bacteria.The overrun of pH value in bottled purified water for drinking was universal,to which more attention should be paid.Active monitoring and supervising should be intensified for bottled purified water for drinking and fine drinking water.