Over 3 billion people do not have access to safely-managed sanitation. This causes widespread health and environmental problems, including significant impacts to groundwater, especially in urban areas. Disposal of sewage effluent to ground and losses from sewers may enhance groundwater resources but can also be major sources of pollution, particularly to wells nearby. Where sewers lie below the water table, they may drain the groundwater resource and add to effluent flows requiring treatment. In improving access to properly managed sanitation, awareness of groundwater vulnerability and potential interactions is critical. The latest paper in IAH’s Strategic Overview Series describes these issues.
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https://iah.org/wp-content/uploads/2024/01/IAH-Sanitation-Groundwater20-Dec-2023.pdf
