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Report No 1: Concept for initial water quality assessment and water monitoring plan during implementation for ASR pilot in Hau Giang province
November 2024

This report describes general water quality considerations during Managed Aquifer Recharge (MAR) operation. These are based on three main aspects:
• Operational risk due to clogging
• Risk of contamination of the ambient groundwater and aquifer
• Risk of water quality deterioration during storage e.g. due to redox reactions

Surface water quality in Hau Giang province is affected by domestic and industrial (un-)treated wastewater discharges as well as agricultural runoff and discharges from aquaculture. The water quality of the treated water meets the Vietnamese technical guidelines for drinking water. Ambient groundwater quality is variable ranging from fresh to brackish and may contain elevated concentrations of iron, ammonium and coliforms.

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