Analysis on Total Hardness and Total Dissolved Solids of Finished Water in Qingpu District
Objective:To study the contents of total hardness and total dissolved solids in finished water of water plants in Qingpu district,and to provide support for the improvement of drinking water quality.Method:Collect the testing results of total hardness and total dissolved solids of finished water from 2014 to 2022 for analysis.Result:294 samples of finished water were collected.The median total hardness was 127 mg·L-1,and the median total dissolved solids was 278 mg·L-1,the qualification rate is 100%.Statistical analysis showed that the two items had a downward trend from 2014 to 2022(Rs=-0.375,P＜0.01;Rs=-0.375,P＜0.01).By comparison,total hardness of finished water from three water plants descended sequentially from low water season,usual water season to abundant water season(P＜0.05).Finished water from Dianshan lake has higher total dissolved solids than that from Qingcaosha reservoir(P＜0.05).Conclusion:Finished water in Qingpu district has good taste,but the total hardness level is a little low.It is suggested that local residents increase their intake of calcium and magnesium.
NETL
NSTL
万方数据
