Groundwater monitoring finds higher salt levels in parts of Ha’apai

Groundwater monitoring across Ha’apai has identified higher levels of salt in Foa and central and northern parts of Lifuka, raising concerns about the long-term pressure on freshwater supplies as climate change affects Tonga’s water resources. Tonga Geological Services said testing carried out in March 2025 measured electrical conductivity (EC), an indicator used to assess the [...] The post…