standards 39 Health aspects 38 Environmental aspects 37 Pollution 37 Public Health 37 prevention & control 37 Environmental health 36 Gezondheid 36 Quality Control 36 Water 36 Water Microbiology 36 Water Pollution 36 Water Supply 36 Water quality 36 Water quality management 36 Nepal 31 Health Research 18 Journal of NHRC 18 Journal of Nepal Health Research Council 18 Nutrition 8 World Health Organization 6 Environmental exposure 5 Fertility and Fertility Preferences 4 Health and hygiene 4 Birth control 3 Diagnosis 3 Drugs 3 Family Planning 3 Health surveys 3 Maternal Health 3