Objective To analyze the monitoring data of ammonia nitrogen in drinking water in Inner Mongolia Autonomous Region from 2014 to 2019,and to provide scientific basis for the safety monitoring of domestic drinking water quality.Methods The qualified rate of ammonia nitrogen in drinking water for different years,sampling types,water periods and types of water samples were analyzed and evaluated according to the Standards for Domestic Drinking Water Quality(GB 5749-2022).Results From 2014 to 2019,the qualified rate of ammonia nitrogen in drinking water in Inner Mongolia Autonomous Region was 97.08％,and the qualified rate fluctuated from 95.99％to 98.38％with an upward trend year by year(x2=94.511,P＜0.05).From 2014 to 2019,the qualified rate of ammonia nitrogen in urban water was higher than that in rural water,and the difference was statistically significant(x2=86.475,P＜0.05).The qualified rate of urban water was 98.26％with an upward trend(x2=246.833,P＜0.05),and the qualified rate of rural water was 96.48％,with an upward trend year by year(x2=61.295,P＜0.05).The qualified rate in the high-water period was 97.25％,and the compliance rate in the low-flow period was 96.91％,and the difference between the qualified rates of ammonia nitrogen was not statistically significant(x2=3.660,P＞0.05).The qualified rate of ammonia nitrogen increased year by year.The differences in the qualified rates of ammonia nitrogen were statistically significant among all cities(x2=1 095.427,P＜0.05).The areas with poor ammonia nitrogen reaching the water quality standard were Tongliao,Hinggan League,and Ordos.Conclusion From 2014 to 2019,the qualified rate of ammonia nitrogen in domestic drinking water in Inner Mongolia Autonomous Region is above 95.00％,and the qualified rate is increasing year by year.In the future,it is necessary to focus on strengthening the construction work of rural drinking water safety projects,strengthening the monitoring of rural drinking water quality,and optimizing the pretreatment process of drinking water,in order to protect the environment of water source.
NETL
NSTL
万方数据
