ASSESSMENT OF LAKE WATER QUALITY USING FOR DOMESTIC IN QUANG BINH PROVINCE IN 2019

Abstract

Water quality monitoring results of lakes using for water domestic in Quang Binh in 2019 show that most of the parameters are within the permitted limits according to QCVN 08-MT: 2015/BTNMT. However, the average concentration of BOD₅ in Phu Vinh and Bau Sen lakes exceeded the threshold of the QCVN value of 1,09 times, 1,12 times. The average concentration of nutrients NH₄⁺, PO₄^3- ranged from 0.03 to 0.0625 mg/l, respectively; 0.03 - 0.06 mg/l, the content of nutrients varies between monitoring points. The average coliform density ranges from 55.75 to 93.25 MPN/100 ml, with the highest value at the Phu Vinh lake. The value of monitoring parameters varies between the time of monitoring periods in a year.