Dubai Municipality's guidance for domestic water storage is twice-annual cleaning by an approved contractor, with a certificate retained on file. Many buildings rely on memory rather than schedule and slip out of compliance silently.
What proper cleaning involves
Tank emptying, mechanical scrubbing of walls and base, disinfection with food-grade hypochlorite at a controlled concentration, rinse, refill, and post-clean water sample testing. The whole process for a typical villa tank takes 3-4 hours.
Common defects found during cleaning
Loose access lids that admit dust, defective inlet float valves, biofilm at the base, and corroded internal supports. All four can compromise water quality between cleanings.
Documentation that satisfies inspection
Cleaning certificate from the approved contractor, post-clean water test result, and dated photographs of the tank interior before and after. Retain for at least one year.
Owner checklist
- Schedule cleaning every six months
- Use a Dubai-approved cleaning contractor
- Inspect the tank lid seal and overflow on the same visit
- Test water clarity and chlorine after refill
- Retain certificate and photographs
- Add tank cleaning to the AMC scope if possible
Why this matters
Water quality complaints in Dubai apartments often trace to dirty tanks rather than DEWA supply; the fix is straightforward when scheduled.