| Type of examination | Maximum permissible limits issued by the Minister of Health and Population | |
| Old No. (108) of 1995 | Modern No. (458) of 2007 | |
| When examining water microscopy samples | Examining water microscopy should be completely free of protozoa and all stages of pathogenic worms | Examining water microscopy should be completely free of live protozoa and all stages of pathogenic worms |