He said this massive capacity meant that groundwater could be an alternative source of water supply for the country.

However, for now, it is only used as a source of drinking water in Kelantan, Terengganu, Pahang, Sabah and Sarawak.

Ismail said countries with high usage of groundwater included Denmark (100%), Austria (98%), Thailand (80%), China (78%) and the US (50%).

“The National Water Resources Study (NWRS) for Peninsular Malaysia (2000-2050) found that groundwater can be used as an alternative source of water for rural and isolated areas.

“It can be used for various purposes, including industry, agriculture and homes,” Ismail said when launching the World Water Day 2022 national-level celebration at Taman Awam Bera here today.

Ismail said the energy and natural resources ministry, through the minerals and geoscience department, was actively implementing activities to increase use of groundwater.

He said the government was reviewing the National Water Resources Policy (DSAN), taking into account the current situation and challenges faced by the country.

DSAN emphasises the need for environmental protection to conserve water resources. It ensures safe water resources through conservation and effective management.

The prime minister said the country needs to manage issues of excessive quantities of water during the rainy season, insufficient amounts during droughts, deteriorating water quality and uneven distribution.