Nepal 188 Knowledge 67 Kathmandu 48 Public Health 46 prevention & control 45 standards 44 Environmental health 41 Health aspects 41 Environmental aspects 39 Pollution 37 Water quality 37 Gezondheid 36 Quality Control 36 Water 36 Water Microbiology 36 Water Pollution 36 Water Supply 36 Water quality management 36 methods 32 Children 31 Prevalence 26 Epidemiology 23 Research 23 Women 21 Depression 19 Epidemiologic Methods 15 HIV/AIDS 15 Methodology 15 Mothers 15 Prevention 15