Water quality 39 Water Microbiology 38 Water Supply 38 Pollution 37 Environmental aspects 36 Environmental health 36 Gezondheid 36 Health aspects 36 Public Health 36 Quality Control 36 Water 36 Water Pollution 36 Water quality management 36 prevention & control 36 standards 36 Guidelines 4 Drinking water 3 Water pollution 3 Water supply standards 3 World Health Organization 3 Foreign Aid Policy, 2002 2 Foreign Investment and One Window Policy, 1992 2 Forestry Sector Policy, 2000 2 National Agriculture Policy, 2004 2 National Drug Policy, 1995 2 National Health Policy, 1991 2 National Health Research policy 2 National Nuclear Policy, 2007 2 National Shelter policy, 1996 2 National Water Plan (2002-2027) 2