Surface Water Quality Influenced by Industrial Wastewater Effluent in An Giang Province, Vietnam

Abstract

The study was conducted to evaluate the impact of wastewater from
industrial zones on surface water quality in water bodies of An Giang
province in 2020. Surface water samples were collected at three
locations (S1-S3) where it was affected by wastewater from the
industrial park. The parameters of pH, temperature, total suspended
solids (TSS), biochemical oxygen demand (BOD), chemical oxygen
demand (COD), ammonium (N-NH4
+
), total oil and grease, and
coliform were analyzed for water quality evaluation. Surface water
quality is assessed by comparing each water parameter with the
National Technical Regulation on Surface Water Quality (QCVN 08-
MT:2015/BTNMT), column A1 and water quality index (WQI). The
research results showed that the water quality was polluted because
TSS, COD, BOD, N-NH4
+ and coliform parameters exceeded the
permissible limits. The parameters of temperature, pH, oil and grease
are still within the allowable limits. WQI index ranges from heavy
pollution to the level of use for domestic water supply, but appropriate
treatment measures should be applied, most of which are suitable for
irrigation. The current finding shows that wastewater from industrial
activities has an adverse impact on surface water quality, requiring
timely treatment solutions to ensure safe water use.