Human Settlements, Water and Sanitation Minister Lindiwe Sisulu on Sunday called on all municipalities to prioritise maintenance of water and sanitation infrastructure to prevent pollution of dams and rivers. In a statement issued after a briefing by water and sanitation department acting director general Squire Mahlangu on the water shortage in Mahikeng in the North West, Sisulu said she had directed Mahlangu to submit a national report on the state of water and sanitation infrastructure and the maintenance programme by municipalities.