Current Research on Geography, Earth Science and Environment Vol. 8

Groundwater constitutes the world's largest accessible reservoir of liquid freshwater, sustaining drinking water supplies, agricultural production, and ecological functions across every inhabited continent. Yet this finite and largely invisible resource is under unprecedented pressure from agricultural intensification, rapid urbanisation, industrial demand, and the compounding effects of climate variability and change. Groundwater depletion, deteriorating water quality, governance deficits, and inequitable access collectively represent one of the most consequential and under-regulated environmental challenges of the twenty-first century. This critical review examines the current state of global groundwater resources, evaluating the principal drivers of stress, contamination dynamics, governance architectures, technological innovations, and socio-economic dimensions of groundwater use, while identifying evidence-based pathways toward sustainability. The literature underpinning this review was identified through targeted searches of multiple academic databases, conducted across the period January 2000 to March 2026. Drawing on literature spanning hydrogeological science, environmental governance, agronomy, remote sensing, and political ecology, the review synthesises knowledge across disciplinary boundaries to assess where meaningful progress has been made and where critical gaps remain. The chapter argues that piecemeal, technically focused interventions are insufficient and that durable solutions require integrated governance reform, equitable access policies, sustained investment in monitoring infrastructure, and strengthened international cooperation over transboundary aquifer systems. Managed aquifer recharge, satellite-based monitoring, and precision irrigation offer genuine opportunities, but their effectiveness is ultimately conditioned on political will, institutional capacity, and a collective recognition of groundwater as a shared intergenerational resource.