Groundwater Extraction in Over-Exploited Areas: Rules for Industry

A factory in an over-exploited block can still draw groundwater in some cases, but it is the hardest place in India to get or keep that permission. Over-exploited means the area already draws more groundwater each year than rain and other sources put back. In such blocks, new water-intensive units face tight restrictions or outright refusal, existing units need a NOC with stricter conditions, and charges and compensation for breaches are higher. The practical answer for most industries is to plan water around recycled, supplied or surface water, and treat groundwater as a limited, closely watched supplement.

This guide is for factory owners, plant heads, builders of industrial sheds, investors buying land and compliance managers who need to know what a block's groundwater category means for their unit. It explains how areas are classified, what changes for new and existing units, and how to stay lawful when the water table is falling. For disputes and complaints generally, see our page on illegal groundwater extraction.

If you only need to know whether your unit needs a NOC at all, our explainer on groundwater NOC exemptions is the quicker read.

The essentials

Can a factory use groundwater in an over-exploited area?

Sometimes, but on much stricter terms than elsewhere, and for some new units not at all. Under the Central Ground Water Authority guidelines (2020, as amended), and under the state laws in states that regulate groundwater themselves, the category of the area is one of the main factors in whether a NOC is granted, how much water it allows and what conditions it carries. Over-exploited blocks sit at the strict end.

For an existing unit that already holds a NOC, the usual position is that it can continue within its permitted quantity, provided it meets every condition and renews on time. Renewal is not automatic, and the authority can reduce the quantity, add conditions or ask for a shift to other sources. For a new or expanding unit, especially one that uses a lot of water, the authority may restrict the quantity sharply or refuse groundwater altogether.

The guidelines have been amended more than once since 2020, and the rules for particular sectors in over-exploited areas have changed with them. Before taking any decision that depends on groundwater, check the current guidelines and the current category of your block, not what a consultant told you three years ago.

What do safe, semi-critical, critical and over-exploited mean?

Groundwater assessment units (blocks, talukas, mandals or watersheds, depending on the state) are classified by the stage of groundwater extraction: how much is drawn each year compared with how much can be extracted sustainably.

The assessment also records whether water levels have been falling over the long term. A block with a steadily falling water table is watched closely even if its category has not yet changed.

How do I find out the category of my block?

The Central Ground Water Board and the state groundwater departments carry out a dynamic groundwater resource assessment at intervals, and publish the category of every assessment unit. Your consultant, the district groundwater cell or the groundwater authority can tell you which unit your land falls in and its present category. Ask for it in writing if a decision depends on it.

Do not rely on the district name alone. Categories are fixed at the block or taluka level, and an industrial area on the edge of a city may sit in a different block from the city itself. If your site lies near a block boundary, confirm which side it is on using the revenue records.

Keep a dated copy of the assessment in force when you apply for or renew a NOC. Categories change between assessments, and if a later dispute turns on what the category was during a particular period, you will want the document that applied then, not the current one. This matters most in compensation cases, where the category is part of the calculation.

Does the CGWA or my state decide?

It depends on the state. Where a state has its own groundwater law and authority, as Uttar Pradesh, Haryana and Punjab do, among others, the state body grants permissions and enforces them, and its own rules on stressed areas apply. Some state laws allow the government to notify particular areas where extraction is barred or tightly controlled, and those notifications can be stricter than the national guidelines.

Where no state regime applies, the CGWA handles NOCs. Either way, the approach to over-exploited areas is broadly similar: limit new demand, push existing users towards efficiency and reuse, and measure what is drawn. A unit that operates in more than one state should not assume the same rules apply at each plant.

The pollution control board is not the groundwater regulator, but it is involved. Consent orders often make a valid groundwater NOC a condition, and consent applications ask for the source and quantity of water. A gap in the groundwater permission can surface at consent renewal, sometimes before the groundwater authority itself notices.

We want to set up a new unit in an over-exploited block. What should we check?

Check water before you sign for the land. The most expensive mistake we see is a buyer who acquires a plot, builds a shed and only then discovers that the block is over-exploited and the process needs far more water than the authority will allow from the ground. By then the options are limited to buying water, building costly recycling, or relocating.

The questions to answer early are simple. How much water will the process need each day, at full capacity? What category is the block, and what do the current rules say about new units of your type there? Is there an industrial area supply, a municipal treated wastewater line or a surface water allocation you can tap? Can the process be redesigned to recycle most of its water? If the answer depends on groundwater and the block is over-exploited, plan for a refusal and treat any NOC as a bonus.

Projects that need environmental clearance under the EIA Notification 2006 will be asked about the water source during appraisal. Appraisal committees in water-stressed areas commonly insist on alternatives to groundwater, and clearance conditions often say so. Consent to establish will also ask. Inconsistent answers across the clearance, consent and groundwater applications are a red flag for every authority involved. Our page on environmental clearance covers that process.

We already draw groundwater and our block has become over-exploited. What changes?

Your existing NOC does not vanish when the category changes, but renewal becomes harder and the conditions tighter. Expect the authority to look closely at your actual extraction against the permitted quantity, your water audit, how much treated wastewater you reuse, and whether your recharge structures work. A unit that has been drawing near its maximum with little reuse may find its quantity cut on renewal.

Start preparing well before the NOC expires. Commission a water audit, fix leaks and once-through cooling, increase reuse of treated effluent, and document the result. When you apply for renewal, show the trend: water drawn per unit of production falling year by year. That is the argument authorities in stressed areas respond to.

If you plan to expand, treat it as a fresh decision. Expansion that needs more groundwater in an over-exploited block is exactly what the rules are designed to restrict. An expansion that holds groundwater use flat, or reduces it, by adding recycling is far easier to justify. For the consent side of expansion, see consent for expansion.

Conditions that usually come with a NOC in a water-stressed block

The exact conditions are written into each NOC, so read yours. These are the ones that appear most often for industry in critical and over-exploited areas.

• Metering. Tamper-proof digital flow meters on every borewell, usually with telemetry so the authority can see readings remotely.
• Water level monitoring. Piezometers within the premises, often with automatic water level recorders, to track the effect of pumping.
• Recharge. Rainwater harvesting and recharge structures sized for the site, kept clean and working through the monsoon.
• Water audit. Periodic audits showing where water goes and what has been done to cut use, often by a qualified auditor.
• Reuse. Treated wastewater used for cooling, gardening, flushing or process water in place of fresh groundwater.
• Quality testing. Periodic testing of groundwater quality from the borewells and piezometers.
• Reporting. Compliance reports filed on time, with meter data, audit results and photos of recharge structures.
• Quantity cap. A firm limit on daily or annual extraction, with no new borewells without permission.

How to keep a factory lawful in an over-exploited block

This is the plan we suggest for a unit that already depends partly on groundwater in a stressed block, or is about to.

Units that follow this plan rarely end up in a dispute. When they do, the documents produced along the way are the evidence that wins it.

Lawful alternatives to groundwater for industry

The last row deserves emphasis. Buying tanker water whose source is an unpermitted borewell does not make your unit compliant, and if the supplier is caught, your purchase records may be read as evidence of the demand that kept it running. Ask suppliers for their permission details and keep a copy.

Are some industries treated more strictly than others?

Yes. Units whose product is essentially water, such as packaged drinking water and similar bottling units, and other water-intensive sectors are treated most strictly in over-exploited areas, and in some situations no new groundwater permission is given to them at all. The guidelines and their amendments set out sector rules, so check the current text for your sector before you invest.

Infrastructure projects, mining and dewatering are treated under their own provisions. Mines and large construction sites that pump out groundwater to keep pits or basements dry are often surprised to learn that dewatering is regulated too, and that the water pumped out is expected to be put to use rather than dumped into a drain.

Highly polluting sectors face a second layer. Where consent conditions or board directions require zero liquid discharge, the unit must already recycle almost all its wastewater. Our guide on zero liquid discharge rules explains who that applies to. A ZLD unit with good records is usually well placed when it applies for a groundwater NOC in a stressed block, because its fresh water demand is already low.

What happens if a unit in an over-exploited block breaks the rules?

The tools are the same as elsewhere, used with less patience. The groundwater authority or the district administration can direct that extraction stop and seal borewells under section 5 of the Environment (Protection) Act. Environmental compensation is levied for illegal extraction and for breach of conditions, and the category of the area is part of the calculation, so the same violation costs more in an over-exploited block. The consent of the unit may also be affected.

When a notice arrives, the reply should be prompt and backed by data. Our guide on responding to a CGWA notice covers that in detail, and environmental compensation for illegal groundwater use explains how the figure is built and challenged.

Neighbours and villagers in stressed areas are also more likely to complain, because they feel the effect of every new borewell in their own wells. A unit that draws heavily while nearby handpumps fail can find itself before the NGT on an application by residents. Good records and visible recharge work are the best defence in that situation too.

For any unit in, or moving into, an over-exploited block

Mistakes industries make in water-stressed blocks

The commonest is assuming a NOC is a permanent entitlement. It is a time-bound permission with conditions, and in stressed areas the conditions are actively checked through telemetry. The second is drilling an extra borewell quietly when demand rises. It almost always shows up, either in an inspection, a complaint from neighbours or a mismatch between production and metered water.

Buyers of industrial land and running units make a third mistake: they check title, consent and fire safety, but not groundwater. When Advocate B.K. Singh reviews a unit for acquisition in a water-stressed district, he asks for the NOC, three years of meter data and the last compliance reports before anything else, because a unit that cannot get water lawfully is worth much less than its buildings. Our environmental due diligence page explains that review.

Where to go from here

For applying for or renewing permission, see our page on groundwater NOC from the CGWA. If you are a resident watching tankers drain your area rather than a business owner, read water tanker mafia and illegal borewells.