If you're applying for a new BWSSB Cauvery water connection — whether for a newly built house, a property that never had a formal connection, or converting from borewell-only supply — rainwater harvesting isn't a box you check after the fact. It's part of the application itself. Here's exactly what's required and how to get it sorted without delays.
Why RWH comes before, not after, your connection
BWSSB's compliance requirement isn't only enforced on existing connections through penalty billing — it's built into the new connection application process itself. If your property meets the threshold (30×40 ft / 1,200 sq ft and above for post-2009 construction, 60×40 ft / 2,400 sq ft for older properties), you need to demonstrate RWH compliance as part of what you submit, not something BWSSB checks on later.
This catches a lot of people off guard — especially those who assumed RWH was purely a post-connection penalty issue rather than an upfront application requirement.
The document checklist for your application
- Photographs of the installed RWH system. Clear photos showing the filter, storage connection, and pipe routing — enough to demonstrate a functioning system, not just parts lying around.
- Self-declaration form. A signed declaration confirming the system meets BWSSB specifications, submitted to your local sub-division office.
- Property documents showing plot dimensions. Your khata certificate or sale deed, used to confirm whether your plot meets the compliance threshold in the first place.
- Completion certificate (recommended). Not always mandatory, but a written certificate from your RWH contractor confirming installation specifics makes the application process smoother and gives you a reference document if questions come up later.
A practical timeline if you're starting from scratch
| Step | Typical time |
|---|---|
| Site assessment by RWH contractor | Same day to 1 day, usually free |
| System installation | 2-5 days depending on system type |
| Documentation preparation | 1-2 days |
| Submission + BWSSB processing | Varies by sub-division, typically 1-3 weeks |
Starting this process a few weeks before you actually need your water connection active gives enough buffer for both installation and the BWSSB documentation cycle.
Common mistakes that delay applications
- Installing a token system just to have "something." A pipe connected loosely to a drain with no real storage or recharge function often doesn't pass scrutiny and can bounce the application back.
- Submitting photos before the system actually functions. If the filter isn't properly connected or the first-flush diverter isn't installed, this shows in photos and can trigger a request for revision.
- Not checking your exact plot dimensions first. Some properties are borderline on the threshold — confirming this before assuming you need (or don't need) RWH saves a wasted step.
Applying for a new BWSSB water connection and need RWH installed and documented correctly the first time? Call +91-8123083393 for a free site assessment — we handle installation and the full documentation package.
Frequently asked questions
Yes, for properties meeting the threshold (30x40 ft / 1,200 sq ft or larger for post-2009 construction), RWH proof is part of the application documents, not just a post-connection requirement.
Photographs of the installed system, a self-declaration form, and property documents showing plot dimensions. A completion certificate from your contractor is recommended though not always mandatory.
Installation typically takes 2-5 days, and most homeowners can be ready to submit their application within a week of starting the process.
This varies by sub-division and is not guaranteed. It's safer to have RWH in place before applying to avoid delays or immediate penalty risk.