You'll find a lot of vague claims online about a specific legal requirement to clean water tanks "every 3 months" in Hyderabad. Here's the precise, source-checked answer: that specific frequency isn't written into the GHMC Act itself. What the law does say is more interesting, and arguably more important to understand.
What Section 506 actually says
Section 506, Greater Hyderabad Municipal Corporation Act, 1955: "Power to order cleansing of insanitary private water source, spring, tank, well, etc., used for drinking." In plain terms: this section gives the GHMC Commissioner the authority to order the cleaning of any private water source, including a tank, if it's found to be insanitary and used for drinking water. It's an enforcement power the Commissioner can exercise, not a fixed cleaning calendar written into the Act.
Why this distinction actually matters
- It means the legal risk isn't "did you clean on schedule", it's "was your tank found insanitary." Regular cleaning is how you avoid ever reaching that point, not a box-ticking exercise against a specific date.
- If your building is ever flagged in a municipal inspection, having a documented cleaning history (QR-verified certificates, a maintained EcoScore record) is exactly the kind of evidence that demonstrates compliance intent, even though the Act itself doesn't mandate the specific interval.
- For RWAs and commercial properties specifically, this is a genuinely useful thing to know precisely, rather than repeating a frequency claim that isn't actually in the statute, getting it right protects you if it's ever raised.
So how often should you actually clean?
Absent a fixed legal interval, the right benchmark is the operational one: domestic tanks every 3–6 months, commercial and institutional properties quarterly. These recommendations exist because that's roughly how long it takes for sediment and biofilm to build up meaningfully in Hyderabad's typical water conditions, not because a specific clause requires it.