某高校饮水机卫生状况调查

目的了解某高校教师办公室内饮水机桶装纯净水的使用情况及微生物污染状况,探讨其原因并提出处理措施。方法进行现场问卷调查,根据调查情况选取学校21台同一品牌的饮水机和桶装水取样,按照GB 17324-2003《瓶(桶)装饮用纯净水卫生标准》对流经饮水机的水样进行菌落总数、总大肠菌群、pH和电导率的检测结果进行判定。结果冷水菌落总数合格率为71.40%,靠窗处的5台饮水机,冷水菌落总数均不合格,其余不在窗户阳光直射下的16台饮水机冷水菌落总数合格率为56.25%,且随着饮用时间延长而降低,7 d后合格率为0%,pH合格率为90.48%,电导率合格率为57.14%;沸水菌落总数合格率为100%,pH合格率为76.19%,电导率合格率为57.14%。冷热水中总大肠菌群均未检出。结论某高校教师办公室内饮水机冷水微生物随着饮用时间延长,超标率不断增高,饮水机的摆放位置对细菌污染程度有一定影响。

Investigation on hygienic quality of barreled pure water in a university

Objective To understand the hygienic status of barreled pure water in a university. Methods 21 sets of the same brand water dispenser and bottled water were tested according to the field questionnaire investigation. Total colony count, total coliform, pH and conductivity of the boiled water and cool water were examined respectively. Results The qualified rates of detection in cool water were as follows： the colony count is 71.40 %, pH is 90.48% and conductivity is 57.14%. The qualified rates of the total colony count in 5 water dispensers which near the window were total over national standard, and that in other 16 water dispensers were 56.25%. It decresed to 0% after 7 days used. The qualified rates of total bacteria, pH and conductivity in boiled water were 100%, 76.19%, 57.14% respectively. Total coliform were not found in all samples.Conclnsions The unqualified rates of microorganism in cool water which out of water dispenser in a university teacher＇s office is increasing with the elongated drinking time. The total bacterial samples had obvious statistical difference between boiled water and cool water. The location of water dispenser inlueneed the bacterial pollution status.