Effect of Industrial Activities on Surface Water Quality in the An Giang Province, Vietnam

Abstract

This study aims at assessing the variation of water quality in regions

affected by industrial production activities in An Giang province,

Vietnam. Seven surface water quality parameters including

temperature, pH, total suspended solids (TSS), biological oxygen

demand (BOD), chemical oxygen demand (COD), ammonium

(NH4

+

), and coliform were used for the assessment. The water

samples were taken at three locations in the rivers influenced by

industrial clusters three times per year (March, June and

September). The results show that the water quality parameters

including, TSS, BOD, COD, NH4

+

exceeded the limits of column A1

of the national regulation of suface water quality (QCVN 08-

MT:2015/BTNMT). In addition, the water is heavily microbially

contaminated since coliform density exceeded the limits by 3 to 18.4

times. The water quality index (WQI) water quality index ranges

from 15 to 72 indicating the overall water quality from moderate to

poor. The dry season is the most polluted time, especially at My Quy

industrial park (CNI). In the rainy season, the water quality

improves although pollution still occurs. The main causes can be not

only industrial activity but agricultural production activities,

domestic wastewater services, circulation processes since the

collected water samples have been polluted by several integrated

polluting sources.