Abstract：Objective To investigate the concentration of ammonia nitrogen and its influencing factors in drinking water in Dongting Lake area in Hunan Province. Methods Based on the data about drinking water in Dongting Lake area in Hunan Province during 2015-2019 and directly reported by Hunan Drinking Water Quality Monitoring Network, we analyzed the concentration of ammonia nitrogen and its influencing factors in drinking water in Dongting Lake area through comparing ammonia nitrogen concentration of water samples collected from different years, sampling types, water sources, water supply types and water types. Results The median of ammonia nitrogen concentration in drinking water in Dongting Lake area in Hunan Province during 2015-2019 was 0.040 (0.010, 0.100) mg/L, with a total qualified rate of 98.54%. The qualified rates in different years showed statistically significant differences (χ2=19.724, P=0.001), with an increased trend from 2015 to 2018 (χ2trendency=16.477, P<0.001).Compared with the rural drinking water, the concentration of ammonia nitrogen was lower in the urban drinking water (Z=-107.403, P<0.001), but the qualified rate was higher in the urban drinking water (χ2=16,136.000, P<0.001). There were statistically significantly differences in the concentration of ammonia nitrogen and the qualified rate in drinking water from different water sources, water supply types and water types (all P<0.001). The results of multivariate logistic stepwise regression analysis revealed that rural water (OR=7.569, 95%CI:1.008-56.864), underground water (OR=4.702, 95%CI:2.397-9.224) and non-central water supply (OR=6.28, 95%CI:2.251-17.519) were risk factors for the exceeding standard of ammonia nitrogen in drinking water in Dongting Lake area in Hunan Province. Conclusion The average concentration of ammonia nitrogen in drinking water in Dongting Lake area in Hunan Province during 2015-2019 met the national standard, with annual differences. Sampling types, water sources and water supply types were all the factors influencing ammonia nitrogen concentration in drinking water.
张杏娥, 黄涛, 周纯良, 吕玲双. 2015—2019年湖南省洞庭湖区饮用水中氨氮水平及其影响因素分析[J]. 实用预防医学, 2021, 28(11): 1336-1339.
ZHANG Xing-e, HUANG Tao, ZHOU Chun-liang, LYU Ling-shuang. Ammonia nitrogen concentration and its influencing factors in drinking water in Dongting Lake area in Hunan Province, 2015-2019. , 2021, 28(11): 1336-1339.
2021, Vol. 28 
