For most of my career water was the one thing on the job I never thought about. You turned the tap and it ran. The bill was an afterthought. That era is closing. As I write this in July 2026, Thames Water is pleading with fifteen million Londoners to put the hosepipe down, the counties around us are already under formal bans, and the Environment Agency has the South East marked as seriously water stressed – not for a bad summer, but for good. Anyone running a cleaning operation in this city needs to understand what that means for how we work, because it’s already changing.
How bad is London’s water situation, really?
Start with the weather, because it’s the part everyone sees. Spring 2025 was the driest in more than a century, 2026 has broken heat records that stood for decades, and demand for mains water has jumped by half across London and the Thames Valley in the hot spells. Thames Water hasn’t imposed a formal ban as I write, but it’s a whisker away, and South East Water in Kent and Southern Water on the coast already have theirs in force, with Anglian’s covering the east. Thames has already pushed an extra billion litres into its network just to keep pace, and that only buys time.
Weather is only the trigger, though. The deeper problem is structural, and it doesn’t disappear the week it finally rains.
Why “seriously water stressed” is more than a bad summer
The South East is one of the most water-stressed regions in the country – drier per head than plenty of places you’d think of as arid, with more people packed onto less available water. The Environment Agency’s own planning says that under low river flows there is essentially no spare water left to take from the ground or the rivers across most of the region, and that England will need up to five billion extra litres a day by the mid-2050s just to stand still. That’s the equivalent of filling Wembley Stadium four and a half times over, every single day. London sits at the sharp end of that arithmetic. The tap will keep running, but the assumption that it always will, and cheaply, is finished.
Does any of this actually reach commercial cleaning?
The easy assumption is that hosepipe bans are a domestic matter – roses and paddling pools, nothing to do with cleaning contracts. That’s half right, and the wrong half to rely on. A Temporary Use Ban restricts non-essential hosepipe use, and the list of what counts as non-essential includes cleaning paths and patios, and washing a vehicle. That is a description of a good slice of commercial exterior cleaning. When a ban lands, jet-washing a forecourt or hosing down a bin store with mains water is squarely in scope, and the fine runs to a thousand pounds a breach.
Above the hosepipe ban sits the drought order, granted by government in a serious drought, which can restrict commercial and industrial water use directly. And beneath the legal picture is the plain commercial one: sixty per cent of all business water use in England now sits in regions the regulator calls seriously water stressed, and some companies in the driest areas have started refusing new business water connections altogether.
My honest view cuts against my own trade. A ban that stops a pensioner filling a watering can while a contractor jet-washes a car park all afternoon is a nonsense, and it won’t survive. External cleaning firms should be planning now as though the restrictions already apply to them, because within a few dry summers they will. The contractors still selling weekly mains-fed pressure washing as a default service are going to look, before long, the way the office smoking room looks now.
The jet-wash is where it bites first
Pressure washing is the thirstiest thing most cleaning firms do. A single hose or lance can pour out up to a thousand litres an hour – the water twenty-five people would use taking a four-minute shower each – and a morning spent blasting a service yard gets through a startling amount of it. Worse, most of that water ends up carrying silt and detergent straight down the drain, which isn’t only wasteful. In many cases it’s a pollution breach, because that runoff is meant to go to foul sewer, not the surface drain feeding the nearest river. Water recovery fixes both at once – less taken from the mains, and nothing illicit reaching the watercourse. The jet-wash is the first place scarcity bites, and the first place a sensible operation changes how it works.
Where does the water actually go in a cleaning operation?
If you’ve never metered it, the honest answer is that nobody knows, and that’s the first problem. Water is invisible on most cleaning jobs in a way that materials and labour never are. It shows up as one line on a bill weeks later, long after anyone could tie it to a task. Barely one business water meter in ten is a smart one, so for most operators the usage runs close to unmeasured.
When you do look, the pattern is consistent. External pressure washing is the biggest single draw. After that comes carpet and upholstery extraction, which pushes clean water in and pulls dirty water out by the gallon, and then the daily waste of mopping, where the bucket gets refilled far more often than the dirt requires. Kitchen and washroom deep cleans, taps running throughout, sit somewhere in between. A surprising amount goes on rinsing – rinsing off chemical that was over-applied or slathered on out of habit. Good water, straight down the drain.
Flooding a floor is a habit, not a method
The mop and bucket is where the ordinary waste hides. Most cleaners were taught to work wet, and a flooded floor feels thorough even when it isn’t – it just takes longer to dry and leaves more residue behind. A flat microfibre system, pre-dosed so each pad carries only the water and solution it needs, does the same job on a fraction of the water and leaves the floor dry enough to walk on. The equipment has never been the hard part. The hard part is twenty years of muscle memory that says wetter means cleaner.
What does water-tight best practice look like now?
The good news is that cutting water use in cleaning rarely means cleaning worse. It means cleaning deliberately.
Reclamation is the biggest single saving for anyone doing exterior or carpet work. Modern pressure-washing rigs can capture and filter the runoff and put it back through the lance, cutting fresh-water draw sharply and solving the drainage problem in the same move. Carpet extraction has its own recovery systems. For exterior work there’s also water you needn’t buy at all – a tank capturing roof runoff gives a free supply for washing down that no ban can touch, because it never came from the mains. The kit costs money up front and pays it back in water bills and in not being shut down the week a ban arrives.
I look after a distribution yard over in Charlton where the client had us jet-washing the hardstanding and the bin area every week with a mains hose, straight to the surface drain. Through the dry spell last year we changed it: the wash dropped to fortnightly except for genuine spills, and a machine that recaptures and recycles its own water replaced the mains hose. In between, the yard got swept mechanically. It looks exactly the same as it did. The water going down the drain fell by close to two-thirds, and the client stopped lying awake over what a drought order would do to their operation.
Indoors the wins are smaller, but they stack: correct chemical dilution so nothing needs over-rinsing, and microfibre pads instead of a slopping mop. Steam and low-moisture methods have their place on the jobs that suit them. None of it is exotic. It’s the difference between a cleaner who thinks about water and one who’s never had reason to.
Don’t dirty the water you’ll only have to clean again
The single shift in thinking worth more than any machine is this: every litre you use, you also have to deal with once it’s dirty. Water you never ran is water you never have to filter or pay twice for. Good exterior contractors now scope a job around capturing and reusing what they can, and treat mains water as the expensive, regulated input it has quietly become rather than something free that falls from the sky.
Is saving water going to cost or save the client money?
Honestly, not much today – and that’s the part the water industry needs to fix. The pricing is upside down: the more water a business uses, the cheaper each litre gets, so the client with the biggest waste has the weakest reason to care. Water is rarely a large enough line on a commercial budget to move anyone on cost alone. The Environment Agency admits as much in its own strategy, which is a strange thing to read in a government document.
The case for using less water rests on risk, not on this quarter’s bill. A business that has already halved its cleaning water use doesn’t flinch when a ban lands or a drought order restricts commercial use. It isn’t the one whose forecourt greens over because the contract was built around a hose that’s now unlawful to switch on.
The incentives are backwards, and it won’t hold
That pricing won’t last, because the sums behind it don’t. The government wants business water use down nine per cent by 2038, and smart meters are landing on commercial supplies in their millions. Metered water that someone can watch hour by hour tends to fall, simply because they’re finally watching it. The clients who get ahead of this – who treat water discipline as normal now, while it’s still voluntary – are the ones who won’t be scrambling when it isn’t. The rest will pay for the delay, one dry summer at a time.
