Nepal 294 Knowledge 83 Kathmandu 54 Public Health 48 prevention & control 48 standards 47 Health aspects 45 Environmental aspects 41 Environmental health 41 methods 41 Pollution 39 Water Microbiology 38 Water Supply 38 Children 36 Gezondheid 36 Quality Control 36 Water 36 Water Pollution 36 Water quality 36 Water quality management 36 Prevalence 35 Depression 24 Public health 23 Women 22 Epidemiology 21 World Health Organization 21 Research 20 Health Research 18 Journal of NHRC 18 Journal of Nepal Health Research Council 18