* Surface Water - Most of the water supply in Peninsular Malaysia comes from surface water sources such as rivers, lakes and dams. The main rivers in Peninsular Malaysia include the Pahang River, Perak River, Kelantan River and Terengganu River. The largest lake is the Kenyir Lake, located in the state of Terengganu.
* Groundwater - Groundwater is also a significant source of water in Peninsular Malaysia, particularly in the coastal areas and small islands. Groundwater is extracted from aquifers, which are underground layers of permeable rock or sediment that contain water.
Sarawak
* Surface Water - The main source of water in Sarawak is surface water from rivers. The largest river in Sarawak is the Rajang River, which is the longest river in Malaysia. Other major rivers in Sarawak include the Baram River, Sarawak River and Lupar River.
* Groundwater - Groundwater is also an important source of water in Sarawak, especially in the rural areas. Groundwater is extracted from aquifers, which are underground layers of permeable rock or sediment that contain water.
Sabah
* Surface Water - The main source of water in Sabah is surface water from rivers. The largest river in Sabah is the Kinabatangan River, which is the second longest river in Malaysia. Other major rivers in Sabah include the Labuk River, Sandakan River and Segama River.
* Groundwater - Groundwater is also a significant source of water in Sabah, particularly in the rural areas. Groundwater is extracted from aquifers, which are underground layers of permeable rock or sediment that contain water.