What type of water must be used for cleaning and sanitation?

• A. Distilled water only
• B. Sea water
• C. Potable quality water (IS 10500)
• D. Recycled process water

Answer: (C)

Water used for cleaning and sanitation must be safe and not introduce contaminants that could affect hygiene or leave residues. Potable quality water, meeting IS 10500, is designed for safe human consumption and is regularly tested for microbial and chemical parameters. Using this water ensures that cleaning agents work properly and surfaces stay free from harmful organisms or unwanted minerals.

Distilled water isn’t needed for routine cleaning and adds unnecessary cost; it also isn’t required to reach the safety standard for sanitation. Sea water contains high salt and other minerals, and can corrode equipment and leave residues that hinder sanitation. Recycled process water can be reused only if it has been treated to meet potable standards; otherwise it risks introducing contaminants. So, potable water that complies with IS 10500 provides the appropriate balance of safety, practicality, and effectiveness for cleaning and sanitation.