How to verify water and sewage connection approvals

The tower looks finished, the sample flat has running taps, and the sales team assures you "water is not a problem here." But in a lot of peripheral growth corridors — the outer edges of Bengaluru, Hyderabad, Chennai, and the wider Mumbai region — that confident sentence sometimes means a tanker truck makes daily rounds, not that the building has a sanctioned connection to the city water network. The same question applies on the other end of the pipe: is sewage going to a legally connected underground drainage network, or to a package sewage treatment plant that may or may not be adequately sized and maintained?

These aren't abstract concerns. Water and sewage are the two most basic infrastructure services a home needs, and in fast-growing peripheries, board network expansion routinely lags construction by years. The reassuring part is that this, too, is something you can check yourself, because water and sewerage connections are approved and recorded by a specific government body — a city or state water board — and that approval is a documented, dated fact, not a sales promise.

What water and sewage approvals actually are

In most Indian cities, water supply and sewerage are managed by a dedicated water/sewerage board or the municipal engineering department, separate from the general municipal corporation. This body is responsible for laying network infrastructure, sanctioning new connections, and issuing the approvals that formally link a building to the city's water and sewage systems. Examples include the Bangalore Water Supply and Sewerage Board (BWSSB) in Bengaluru, the Hyderabad Metropolitan Water Supply and Sewerage Board (HMWSSB) in Hyderabad, the Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) in Chennai, and the Delhi Jal Board (DJB) in Delhi. Elsewhere, this function often sits with the municipal corporation's own water/engineering department. Exact names vary by city, so the first step is simply identifying the correct authority for your specific location — and confirming its current name and jurisdiction on the relevant state or city government's website, since agency names and boundaries can change.

For a building to have a legitimate, sanctioned water connection, the developer typically applies to the relevant board for a connection sanction, specifying the expected demand (based on the number of units/occupants), and the board issues an approval once the building's plumbing and metering setup meets its requirements. A similar process applies for sewage — either a sanctioned connection to the underground drainage network, or, where the network hasn't yet reached the site, an approved arrangement such as a properly designed and consented sewage treatment plant (STP).

Board connection vs. interim arrangements — an honest distinction

It's worth being upfront about a reality of fast urban growth: not every newly built tower sits on a street where the water board's pipeline has already arrived. In many peripheral layouts, developments rely on borewells for water and on-site STPs for sewage treatment as an interim measure while board infrastructure catches up. This isn't automatically a red flag — it's a common and, when properly approved and maintained, a legal way to serve a building. What matters is:

• Whether the interim arrangement (borewell, STP) itself has the necessary approvals and consents (for instance, from the state pollution control board for an STP's operation).
• Whether there's a documented timeline or commitment for a board connection, versus an open-ended "coming soon."
• Whether the building's water supply is dependent on daily tanker deliveries with no borewell or board connection at all — this is the arrangement worth the most scrutiny, since tanker dependency can be both a cost and a reliability issue over the long run.

Water and sewage connection approvals are also frequently among the prerequisites municipal authorities check for before issuing a building's Occupancy Certificate (OC) — see our related guide on verifying occupancy certificates for that connected check. As with the OC itself, these are public-record facts, not DrawMagic's own assessment of any building.

Step-by-step: how to verify utility approvals yourself

1. Identify the water board or department with jurisdiction over the property's location. In a metro core this is usually clear (BWSSB for Bengaluru, HMWSSB for Hyderabad, CMWSSB for Chennai, DJB for Delhi); in a peripheral or newly-added area, confirm whether that jurisdiction has actually been extended there yet, since board network expansion doesn't always keep pace with municipal limits.

2. Ask the developer or RWA for the water connection sanction letter and, separately, the sewage connection/NOC documentation. These are typically two distinct approvals, even though they come from the same authority.

3. Note the as-of date on each approval, and record it in your own notes just as you would for any other official document.

4. If the building relies on a borewell and/or STP instead of (or alongside) a board connection, ask for the relevant consent documentation — for example, state pollution control board consent for STP operation — rather than accepting a verbal description of the arrangement.

5. Cross-check the sanctioned connection capacity or "load" against the building's actual scale — a water connection sanctioned for a smaller number of units than the tower actually contains is worth a direct question.

6. Ask specifically whether the connection is currently active and metered, versus sanctioned on paper but not yet physically connected — these are two different states, and only the former means water is actually flowing to the building today.

Utility approvals at a glance

City water boards and peripheral realities: a quick view

• Bengaluru — BWSSB serves the core city comprehensively, but network extension to newer peripheral layouts and some outer wards can lag; borewell dependency is common in these areas.
• Hyderabad — HMWSSB covers the Greater Hyderabad Municipal Corporation area; newer outer zones sometimes rely on interim arrangements pending network extension.
• Chennai — CMWSSB serves the metropolitan area; parts of the fast-growing OMR/ECR corridors have historically depended more heavily on tankers and private borewells while network coverage extends.
• Mumbai Metropolitan Region — water supply responsibilities are split between the Brihanmumbai Municipal Corporation (within Mumbai city limits) and various municipal corporations/councils in the wider MMR, so the correct authority depends on the specific location within the region.

As-of-date caveat: these agency names, jurisdictions, and coverage patterns are current as of July 2026 but do change as networks expand and administrative boundaries are redrawn — confirm current jurisdiction directly with the relevant board before relying on it.

A real-world scenario: a Bengaluru buyer confirms a BWSSB connection

A buyer evaluating a flat in a relatively new layout on Bengaluru's outer periphery asked the builder's site office directly for the BWSSB water connection sanction letter, rather than accepting the brochure's line about "24x7 water supply." The site office produced a sanction letter dated a few months after the building's completion, along with a separate sewage connection document referencing the underground drainage network in that layout. The buyer recorded both document dates and, separately, asked whether the connections were currently active and metered — confirming that water was not, in fact, dependent on tanker delivery for that specific building. That distinction — sanctioned and active, versus sanctioned but not yet connected — was the single most useful fact from the entire conversation.

Reading the approval: what to look for

• Sanctioned load/connection size — expressed in terms the board uses (e.g. connection diameter, or units of demand) — and whether it corresponds sensibly to the building's number of flats.
• Connection point and network reference — confirms the specific pipeline or network segment the building is tied into, useful if you ever need to raise a service complaint later.
• Sewage disposal method — underground drainage network connection versus an on-site STP, and if the latter, its rated capacity relative to expected occupancy.
• Any conditions — for instance, requirements around maintaining an STP, rainwater harvesting compliance (often a condition tied to water/sewage approvals in several states), or metering compliance.

Pro tips

• Ask "is this connection sanctioned, and is it also active/metered today?" as two separate questions — sanctioned-but-inactive is a materially different state from live-and-billed.
• If an STP is in use, ask to see its state pollution control board consent and its rated capacity against the building's occupancy, not just a description of "we have our own treatment plant."
• For peripheral properties, ask directly whether the area is within the water board's current network extension plan and, if so, on what documented timeline — vague answers here are worth pressing on.
• Keep copies of both the water and sewage approval documents in your own notes; they're often treated as a single "utilities are fine" claim verbally, but they are two separate approvals worth two separate checks.
• Cross-reference utility approvals against the Occupancy Certificate, since municipal authorities in many cities require these connections to be in place before issuing an OC.

Common mistakes to avoid

• Accepting "water is coming soon" as sufficient. Ask for a documented timeline or, better, the actual sanction and connection status today.
• Treating a borewell-fed building as automatically problematic. It isn't inherently a red flag — what matters is whether the borewell is properly registered and whether long-term reliability has been considered.
• Ignoring sewage disposal entirely. Buyers focus heavily on water supply and often forget to ask the equivalent question about where sewage actually goes and whether that arrangement is legally approved.
• Confusing "sanctioned" with "active." A connection can be approved on paper without yet being physically connected and metered — always ask which state applies today.
• Not checking STP capacity against building occupancy. An undersized STP relative to the number of units can mean recurring maintenance issues for the community down the line.

How this fits into your own due-diligence workflow

None of this requires specialized expertise — it requires asking two specific, direct questions (about water and about sewage) and insisting on documentation rather than a verbal assurance. Given how many separate official-record checks a thorough buyer ends up doing — Fire NOC, Occupancy Certificate, environmental clearance, RERA registration, and now utility approvals — the real challenge is usually keeping track of what's been checked and when.

That's precisely what DrawMagic's buyer workspace is designed to help with: talk through your specific questions using the voice-first "Say Your Mind" companion, and it helps you build a private, running record of these checks, each with the date you confirmed it, so you walk into your final decision with a clear picture rather than a pile of scattered notes.

For the broader landscape of what a thorough first-time buyer should be checking, our buyer resources hub is a useful starting point, and the carpet area calculator is a quick way to independently verify the flat's quoted area alongside these utility checks.

We're also building a dedicated Buyer Intelligence hub — an evolving workspace, shipping soon, intended to bring facts like utility-approval dates together with affordability and locality signals in one place. It's not available yet, but reflects the direction this kind of self-serve verification is heading.

On privacy: any documents or notes you capture in DrawMagic's workspace are handled on a consent-first basis. As the Deloitte India analysis of the Digital Personal Data Protection (DPDP) Rules 2025 explains, Indian data-protection law increasingly requires clear consent before personal data moves to a third party, backed by meaningful penalties for non-compliance (Deloitte India, "India's DPDP Rules 2025," 2025). Full details on how DrawMagic handles your information are on our Responsible AI page — your due-diligence notes remain private to you.

Key takeaways

• Water and sewerage connections are approved by a dedicated city/state water board (BWSSB, HMWSSB, CMWSSB, Delhi Jal Board, or the local municipal water department elsewhere) — not automatically bundled into general building approval.
• Peripheral layouts often rely on borewells and on-site STPs while board network coverage catches up — this isn't automatically a problem if the interim arrangement is properly approved.
• Ask for the water connection sanction and the sewage connection/NOC as two separate documents, each with its own issue date.
• Distinguish between a connection that is sanctioned on paper and one that is active and metered today.
• If an STP is in use, check its state pollution control board consent and rated capacity against the building's occupancy.
• Utility connections are often a prerequisite municipal authorities check before granting an Occupancy Certificate — worth cross-referencing the two.
• This is public-record, self-serve research that costs nothing but a direct question and a request for documentation.
• Keep dated copies of both approvals in your own private due-diligence file.

FAQ

Is a borewell-supplied building automatically a bad sign? Not automatically — it's common in newer peripheral areas. What matters is whether the borewell is properly registered and whether a board connection is planned on a documented timeline, versus an open-ended promise.

What's the difference between "sanctioned" and "active" for a water connection? Sanctioned means the board has approved the connection on paper; active/metered means water is actually flowing and being billed. Always ask which state currently applies to your building.

Who do I ask if the developer can't produce these documents? Ask the RWA if the building is already occupied, or request the documents in writing from the developer's site office; if unresolved, consult a licensed professional — DrawMagic is an information platform and does not verify or certify documents on your behalf.

This article draws on public information about city/state water-board jurisdictions and processes, current as of July 2026. Board names, jurisdictions, and requirements vary by city and change over time — always confirm current details directly with the relevant water board or a licensed professional. DrawMagic is an information platform and does not certify or guarantee any building's utility-connection status.