What happens to a distillery when the water runs out? Abstraction licences, drought, and the water in your bottle

Key takeaways

• Scarcity has already reached the whisky heartland. On 8 September 2025, thirteen Scottish areas stood at Significant Scarcity — the “Lower Spey,” “Findhorn,” “Deveron” and both “Upper Don” and “Lower Don” among them — the point at which “temporary reductions, variations or suspensions of abstraction licences are needed” (SEPA).
• The closures were real. In “the UK’s warmest and sunniest on record,” “multiple distilleries were forced into temporary closures, costing the industry millions of pounds” (The Conversation) — in what the regulator calls “the driest hydrological year in the region since 1976” (SEPA).
• The water at risk is mostly not the water in the bottle. “On average a total of 296 litres of cooling water and 17 litres of process water were used for every litre of whisky produced” (Meadows, University of Strathclyde MSc, 2015). A licence restriction stops the site regardless.
• India regulates the same risk through a permit, not a river gauge. 10.8% of 6,762 assessment units are “Over-exploited,” concentrated in the north-west, the west including Gujarat, and the south (Ministry of Jal Shakti); there, new industrial groundwater NOCs are barred, packaged water excluded “even if they belong to the MSME category” (ThePrint).
• Reduction water is the small, separable share. Against the industry target of “12.5 to 25 l/lpa” (SWA), the water added to reach bottling strength is a low single-digit percentage of site water — which is why it is the piece that can be sourced independently of the licence.

When a distillery runs short of water, the still house stops before the bottling hall does. Almost all of a distillery’s water is cooling water, drawn under an abstraction authorisation from a river or borehole, and a regulator restricting that authorisation does not carve out the few litres per cask destined to become part of the spirit. The result is that a supply risk which has nothing to do with product quality can halt production entirely — and that the one water stream a producer can decouple from that risk is the smallest and most specified of them all.

How much water does a distillery actually take, and what for?

Far more than ends up in the bottle, and overwhelmingly for heat rather than flavour.

The most useful published breakdown comes from a University of Strathclyde study that collected data directly from operating sites rather than relying on literature values. Across the distilleries surveyed, “on average a total of 201 litres of water were used for every litre of whisky produced,” and where cooling and process streams could be reported separately, “on average 296 litres of cooling water were used for every litre of whisky produced. And finally on average 17 litres of process water were used for every litre of whisky made” (Meadows).

The same work puts the industry total in perspective: “the total water usage in 2012 amongst the 100 or so distilleries was about 52 million cubic metres,” most of it cooling water that “is returned to the water system since it is uncontaminated.” Strip the cooling water out and “the total water used by distilleries in 2012 was ~15 million cubic metres.”

That ratio is the whole story of scarcity risk. Cooling water is not consumed — it passes through heat exchangers and goes back to the source largely unchanged — but it must be available, in volume, and cool enough to condense spirit vapour. A river too low to abstract from is a river too low to cool with, and the fact that the water would have been returned is no defence when the abstraction itself has been restricted. The full map of where a distillery’s water goes is set out in how many different waters does a distillery use; the point here is narrower. The volume at regulatory risk and the volume at quality risk are two different things.

What does an abstraction licence actually permit — and can it be taken away?

It permits a stated volume per day, in a tier set by how much you take, and yes, it can be suspended.

Scotland regulates water abstraction under the Water Environment (Controlled Activities) (Scotland) Regulations, on a three-step ladder. Taking “less than 10m³ of water per day,” or “less than 150m³ of water in a year from a borehole,” falls under general binding rules with no application required. Between “10m³ and 50m³ per day from inland surface waters, or groundwater” you must register. Above 50 m³ per day you need a permit (NetRegs). At the measured ratios above, even a modest malt distillery abstracts thousands of cubic metres a day — squarely in the permitted tier, the tier that is written to, and restricted, first.

The escalation is staged. Scotland’s regulator publishes weekly scarcity assessments across four levels, and at the top of the scale “restrictions on abstraction licences may be imposed,” with the assurance that such measures are “targeted, temporary and only remain in place for as long as they are needed” (SEPA). Below that threshold the asks are voluntary: “reducing abstraction where possible, improving water efficiency, staggering abstractions and making use of contingency plans.”

Has this actually stopped whisky production?

Yes — recently, and in the catchments that matter most.

On 8 September 2025, six new areas joined seven already at Significant Scarcity, bringing the total to thirteen: “River Avon, Lower Spey, Upper Don, Lower Don, North Fife, Ythan, Deveron, Tyne (Lothian), Leven (Fife), East Neuk (Fife), Findhorn, South Ugie Water, Lunan Water.” The regulator’s language was explicit about what that status means: “temporary reductions, variations or suspensions of abstraction licences are needed to protect the environment during a prolonged period of low rainfall,” and “all affected licence holders will be written to by SEPA, with details of what they must do, along with the date and time the restrictions come into effect” (SEPA).

Read that list against a map of Scotch production. The Spey, the Findhorn, the Deveron and the Don drain the ground on which Speyside sits — home to “around half of Scotland’s malt whisky distilleries.” The consequences were not hypothetical: with “2025 being the UK’s warmest and sunniest on record,” prolonged dry conditions “led to widespread restrictions on water abstraction,” and “multiple distilleries were forced into temporary closures, costing the industry millions of pounds” (The Conversation).

Nor was it a freak. The regulator’s own retrospective calls 2025 “the driest hydrological year in the region since 1976,” with north-east groundwater at record lows, and warns that even after a wet winter “some areas could still face increased risk if dry conditions persist into the spring and summer” (SEPA). By late July 2026 the Deveron, Don, Tay, Forth and Tweed catchments were back at Moderate Scarcity, with the Spey and Findhorn at Alert (SEPA). This is now an annual operating variable, not an emergency.

It is also the unsentimental sequel to the terroir story of distilleries built beside a spring. Siting a distillery on a burn was a sound decision for two centuries. It is a concentration risk in a drought.

Is the picture different in India?

The mechanism is different; the exposure is comparable.

India manages the same problem through groundwater permitting rather than river-flow triggers. The Dynamic Ground Water Resource Assessment 2025 covers 6,762 assessment units, of which 73.14% are “Safe,” 11.21% “Semi-critical,” 2.97% “Critical,” 10.8% “Over-exploited” and 1.88% “Saline,” against a national stage of extraction of 60.63%. The over-exploited units cluster in the north-west, the west including Rajasthan and Gujarat, and the south (Ministry of Jal Shakti, via Vision IAS).

Category is destiny for a new plant. In over-exploited units, no-objection certificates for groundwater extraction are withheld from new industry — with a narrow MSME carve-out that explicitly does not extend to water bottlers: “NOCs will not be granted to new packaged water industries in over-exploited areas, even if they belong to the MSME category.” Existing operations may not expand if doing so increases extraction, and a restoration fee of “Rs 35 per cubic meter” applies in those zones (ThePrint).

For alcoholic beverages the constraint bites harder, because production cannot simply move to wetter ground. “Laws in India, the world’s most populous nation, bar the movement of liquor across state borders without a special permit,” which obliges producers to manufacture in each state they sell in — water stress notwithstanding. In the Alwar cluster in Rajasthan, 2025 permits allow brewers to draw up to about 4.6 million litres of groundwater a day, roughly 65% of it to global firms; a court “directed authorities in March to actively monitor groundwater abstraction and strictly enforce a 2020 government order prohibiting the issuance of new water permits to large industries in over-exploited areas” (ThePrint/Reuters).

An Indian producer therefore faces a version of the Speyside problem in which the binding constraint arrives as a permit decision rather than a weekly river bulletin — and in which the state you must produce in is chosen by excise law, not hydrology. The wider compliance context is covered in regulatory standards for water used in spirits.

How much of this risk is actually in the bottle?

Very little by volume — which is exactly why it is the piece worth separating.

Some arithmetic, from cited inputs rather than a cited statistic. One litre of pure alcohol filled at 60% ABV sits in about 1.67 litres of liquid, carrying roughly 0.67 litres of water. Bottled at 40% ABV, that same alcohol occupies 2.5 litres and carries about 1.5 litres. The reduction water added is therefore around 0.83 litres per litre of pure alcohol — before the volume contraction that shifts the real figure slightly, as set out in the proofing arithmetic. Against the industry’s efficiency target of “12.5 to 25 l/lpa by 2025” (SWA), that is roughly 3–7% of total site water; against the measured real-world averages above, well under one percent.

So the water that will physically become part of the whisky is a rounding error in the site’s abstraction return — and the single stream in which quality is non-negotiable, held to the kind of specification described in demineralised water specifications for spirit dilution. Those two facts together make it the natural candidate for external sourcing. Buying it does nothing for the cooling load that dominates the licence. It does guarantee that the last, most specified step is not hostage to a river gauge, converting a variable abstraction into a certified input. That trade-off is the subject of make it or buy it; scarcity is the argument most make-or-buy models leave out.

What is the industry doing about the rest of it?

Efficiency first, catchment management second, and both are slower than the weather.

The Scotch Whisky Association’s Water Stewardship Framework reports that “water efficiency – measured in l/lpa – had improved by 22% since 2012,” alongside the regulator’s warning that “Scotland may be renowned for its rain but… it can be extremely vulnerable to periods of prolonged, dry weather,” which “with climate change… are expected to become more frequent” (SWA). Beyond the fence line, distilleries have begun building “leaky dams (small barriers built across temporary upland streams)” that slow winter runoff so rainwater can “soak into soil and recharge groundwater” over “weeks or months rather than hours or days” (The Conversation) — banking a wet January against a dry August. In India the commitments are replenishment-led: Diageo’s Alwar site head describes “a vision to reduce water consumption by 40% and to ensure that whatever water is withdrawn from the ground, 100% replenishment is there” (ThePrint/Reuters). All sound; all decade-scale interventions against a risk that arrives in weeks.

What should a buyer ask a blending-water supplier about scarcity?

Treat water security as a supply-chain question with documentary answers, the way you would treat any other critical input.

1. What is the source’s assessment-unit category, and when was it last reassessed? In India that is the CGWB classification — Safe, Semi-critical, Critical or Over-exploited — and it changes between cycles. A supplier should be able to name it without checking.
2. What is the permitted extraction volume, and what fraction is currently used? Headroom is the whole of resilience. A supplier running at 90% of its NOC cannot absorb your growth or a bad year.
3. Is the source confined or surface-influenced? A deep confined aquifer responds to drought on a different timescale than a river intake. Blenders International’s own Vadodara source is a bore at 84 metres, below roughly 70 metres of basalt, with a source temperature stable year-round at 24–26 °C — the kind of specificity a buyer should expect to be given rather than have to ask for twice.
4. What is the contingency if the source is restricted? Alternative sources at the same specification, stored volume, and how long it lasts at your offtake — plus the replenishment position, as a number and a method rather than an ambition.
5. What certifications sit behind the answers? The relevant frameworks are set out in sustainability, sourcing and purity certifications.

A supplier whose answer to scarcity is a sentence about caring deeply for the environment has not answered. The answers above are all numbers.

Glossary

• Abstraction — removing water from a river, loch, or aquifer. Regulated by volume per day, and the activity a scarcity restriction targets.
• CAR — the Water Environment (Controlled Activities) (Scotland) Regulations, under which Scottish abstraction is authorised in three tiers by daily volume.
• Significant Scarcity — the top level of Scotland’s four-step scarcity scale, and the point at which abstraction licences may be temporarily reduced, varied or suspended.
• CGWA / CGWB — India’s Central Ground Water Authority (which issues extraction NOCs) and Central Ground Water Board (which classifies groundwater resources).
• Over-exploited — a CGWB category in which annual groundwater extraction exceeds annual recharge. New industrial NOCs are generally barred in such units.
• Stage of extraction — annual groundwater extraction as a percentage of annual extractable resource. India’s national figure is 60.63%.
• l/lpa — litres of water used per litre of pure alcohol produced. The industry’s standard water-efficiency metric.
• Cooling water — water passed through condensers and returned to source largely unchanged. Not consumed, but the dominant share of what a distillery abstracts.
• Reduction water — the water added to bring matured spirit to bottling strength. See what is blending water.

Frequently asked questions

Can a regulator really stop a distillery from taking water? Yes. At Significant Scarcity, “temporary reductions, variations or suspensions of abstraction licences are needed to protect the environment,” and affected licence holders are written to individually with “the date and time the restrictions come into effect” (SEPA). Thirteen Scottish areas were at that level on 8 September 2025, and “multiple distilleries were forced into temporary closures” that year (The Conversation).

If cooling water is returned to the river, why does taking it matter? Because availability, not consumption, is the constraint. The water must be there to take, and cool enough to condense with. When flows fall far enough to harm river ecology the abstraction is restricted whether or not the water would have come back — and cooling is by far the largest stream, at “296 litres of cooling water… for every litre of whisky produced” (Meadows).

Does buying blending water externally solve a distillery’s water risk? No, and it should not be sold as if it does. Reduction water is a low single-digit percentage of site water against the industry’s “12.5 to 25 l/lpa” target (SWA); the cooling load that dominates the licence is unaffected. What it does is remove the product’s most quality-critical input from that risk pool, and replace a variable abstraction with a certified specification.

Is Indian groundwater regulation stricter than Scottish surface-water rules? It is structured differently. India’s control is a permit granted or refused on the basis of an area’s assessment category — with new industrial NOCs barred in “Over-exploited” units and packaged-water operations excluded even under the MSME carve-out (ThePrint). Of 6,762 assessment units, 10.8% are “Over-exploited,” 2.97% “Critical” and 11.21% “Semi-critical” (Dynamic Ground Water Resource Assessment 2025). Scotland’s control is a licence that exists but can be suspended when flows fall. One constrains where you may build; the other constrains when you may run.

Blenders International · Water Science series