Water must conform to Islamic law and health standards.
Water must be obtained from reliable and trustworthy sources.
Water must be changed and kept clean every day.
The bucket must be kept clean and cleaned every day.
Buckets must be disinfected with boiling water or bleach before use.
Please note that these are only some basic requirements of Iranian tap water standards, and the specific standards may vary according to regions and specific situations. If you need more information about Iranian tap water standards, it is recommended to consult the local health department or water quality testing agency.