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8 in 10 uk homes don't even have 1 day of drinking water stored.
here's what happens when the tap stops.

The households that cope aren't the ones with the most bottles in the cupboard. They're the ones who can make more water once the bottles run out.

Claire Ashworth

Staff Writer | London

Ask most people in Britain what they'd drink if the water went off, and they'll point at the cupboard.

 

A few bottles. Maybe a multipack from the big shop.

 

That feels sorted. It's what most of us would do.

 

This year, the Government checked.

 

Its national preparedness survey asked more than 10,000 adults how much bottled drinking water they keep at home. Then it measured that against 3 litres per person, per day, which is about the least you need just to drink.

 

82% of households didn't have enough for a single day.

 

Picture your street. That's more than 4 out of every 5 front doors.

 

Not a week. Not 3 days.

 

One day.

 

And when the water does go off in this country, it rarely comes back in a day.

 

Last winter, a problem at the Pembury treatment works left about 24,000 homes in and around Tunbridge Wells with no water or low pressure. Families queued at bottled water stations in a sports centre and a cinema car park.

 

When the water came back on, it was for flushing and washing only. You couldn't drink it unless you boiled it first.

 

It was nearly 2 weeks before families could drink straight from the tap again.

 

A month later, Storm Goretti hit. South East Water blamed burst pipes and power cuts. About 30,000 homes across Kent and Sussex lost their water or pressure, and it took about 6 days to get most of them back.

 

Nobody attacked anything. One was a problem at a treatment works. The other was a winter storm.

 

That's how easily the water stops in an ordinary British town.

 

There's a simple fix for that gap, and it fits in a kitchen drawer. But first, here's why the tap stops in the first place.

Your Tap Is the Last Link in a Very Long Chain

You turn the tap and water comes out. It feels like the simplest thing in your house.

 

But a lot has to happen first.

 

Before it reaches your kitchen, your water has to be cleaned at a treatment works, pumped through miles of pipe, and kept under pressure the whole way. Most of that runs on electricity.

 

So if the power stays off long enough, everything between the reservoir and your kitchen slows down.

 

Then it stops.

The Government has tested exactly this. In July, Sir Oliver Dowden, the former Deputy Prime Minister, told MPs about Exercise Mighty Oak. It involved "more than 4,000 people testing the effect of a power outage."

 

"That exercise demonstrated that it cascaded very rapidly," he said, "and that it very rapidly affected water supply."

 

Take the power away, and your water goes with it.

 

And officials don't see attacks on the system as far-fetched any more.

 

This summer, the Government added cyber attacks on water infrastructure to the National Risk Register. That's its official list of the most serious threats facing the country.

 

In June, Dr Richard Horne, head of the National Cyber Security Centre, said it had handled more than 200 cyber incidents affecting Britain's critical infrastructure in the year to May. Around 3 in 4 were believed to be linked to hostile states.

 

None of that means your taps are going off tomorrow.

 

It means the people whose job it is to worry about this are worried.

 

The Government's newest survey asked people how long their household could manage if a power cut also hit their gas and water.

 

1 in 4 said a day or less before they'd need outside help.

 

In Tunbridge Wells, outside help was a queue in a car park.

Why "I've Got Bottled Water" Isn't a Water Plan

Stored water is the right place to start. The Government's Prepare website tells you to keep some, and it's right.

 

The problem is, is that bottles only go one way.

 

Down.

 

Here's the math for a family of four.

 

The Prepare site says each person needs 2.5 to 3 litres a day just to drink. It says about 10 litres each will make you "more comfortable," because you also need water to cook and keep clean.

 

That 10 litres goes fast. Boiling pasta. Washing up. Washing your hands after the loo. Cleaning up after a child who's been sick.

 

Over one week, your family needs 84 litres just to drink.

 

Add cooking and washing, and it's 280 litres.

 

That's 140 big 2-litre bottles stacked in your hallway. It weighs more than 3 grown men.

Almost nobody keeps that at home. And whatever you do keep starts running out the moment you open the first bottle.

 

Nobody comes round to top it up.

 

Bottled water doesn't solve the problem. It buys you time.

 

So the real question is what you do when that time runs out.

What the First 5 Days Look Like When the Tap Stops

Picture an ordinary week in January. A storm goes through overnight, and by breakfast your tap is spitting air.

 

Day 1 is fine, honestly. You've got a few bottles in the cupboard. The kids think it's a bit of an adventure. You flush the loo with a bucket and have a laugh about it.

 

Day 3, the bottles are nearly gone. The water company has opened a collection point across town. You queue in the cold for whatever they're handing out, and you know it won't last long.

 

Day 5, you're rationing. The washing up has stopped. The kids haven't had a proper wash in days. Every time someone asks for a drink, you're doing sums in your head.

 

And all that time, there's water right outside. In the water butt. In the stream at the end of the road. Running off the roof.

 

You just can't trust any of it.

 

That's the real emergency. Not no water. Water you can't drink, everywhere you look.

Now run the same week again.

 

Same storm. Same dry tap. Same queue across town.

 

The only difference is a filter straw in the kitchen drawer for each person in the house.

 

On Day 3, when the bottles run low, you fill a clean bottle from the water butt, screw the straw on, and squeeze the water through into a cup. The kids drink. You filter a jug for the washing up.

 

You can still go to the collection point. You just don't have to count every sip.

 

Same storm. Same week. The only thing that changed was what was in the drawer.

That's Why PureFlow Exists

PureFlow makes an emergency water filter straw. It's about 21 cm long, a bit longer than a pencil.

 

You put one end in fresh water and drink straight through it. Or you screw it onto a bottle of water and squeeze it through into a clean cup or pan.

 

Inside is a hollow-fibre membrane with tiny pores, down to 0.01 micron. Bacteria and sediment are too big to get through, so they stay trapped in the fibres and clean water comes out the other end.

 

It doesn't stop viruses. More on that below.

 

It doesn't need electricity, batteries, tablets or boiling.

 

It works when the tap, the power and the hob have all stopped.

 

And it doesn't replace your bottled water. Keep the bottles. PureFlow is the second line, for when they run out.

 

All you have to do is put one in a drawer.

 

That's it.

3 Questions to Ask Before You Buy Any Filter Straw

A lot of these straws look the same in an advert. These are the 3 questions worth asking, and here's how PureFlow answers each one.

 

1. What does it actually filter out?

 

PureFlow strains out bacteria and sediment by size.

 

In factory testing, it was used on water loaded with E. coli. None was detected in the water that came out.

 

That matters, because water can look clean and still make you ill. A stomach bug is the last thing you want when the tap's off, and your bottles are running low.

 

It clears cloudy water too, so murky water comes out clear.

 

Here's what it doesn't do.

 

It doesn't remove viruses. It doesn't remove chemicals, chlorine, or heavy metals. It's a filter, not a purifier. So use it on fresh water like streams, rain and water butts, and stay away from floodwater and seawater.

 

Be wary of any straw that says it makes any water safe. That’s just not true.

2. How much water can it handle?

 

Each PureFlow is rated for up to about 4,000 litres.

 

That's about 2,000 of those 2-litre bottles, in one straw that fits in your glovebox.

 

The rating comes from tests on tap water. Murky water clogs any filter faster, so you'll get less from a muddy source.

 

When it's nearly used up, the water comes through slower and slower. It doesn't just stop, so you get plenty of warning.

 

3. Will it work after years in a drawer?

 

PureFlow is mechanical. There's no battery to go flat and no chemical to go off.

 

It has no expiry date as long as you store it dry.

 

Just don't let it freeze once it's been wet, because ice blocks the tiny pores. After you use it, shake out as much water as you can and let it dry before you put it away.

Proof: What the Testing Shows

PureFlow tells you what its straw has been tested for, and what it hasn't.

  • No E. coli detected. In factory lab testing, the water going in was loaded with about 210,000 E. coli per millilitre. A millilitre is about a fifth of a teaspoon. None was detected in the water coming out.
  • Cloudy water comes out clear. Murky test water came out clear enough to see straight through.
  • Drop-tested from 1 metre, about the height of your kitchen worktop, with no parts coming loose.
  • The honest limits. It doesn't remove viruses, chemicals, chlorine or heavy metals. PureFlow says so up front.

"We lost water for three days last year, and the stores were cleared out in hours. Never want to get caught like that again. We've got one in each car and a few in the house now. It's the kind of thing you pray you'll never need, but knowing we can filter water safely if it ever happens again means a lot." - Susan Pearce (Verified buyer)

More Than Just a Straw

PureFlow is currently discounting its Emergency Water Filter Straw by up to 67%. Current pricing is on the company's site.

💧 Drink straight from it. Put one end in a stream, a water butt or a jug of rainwater and sip.

🧴 Screw it onto a bottle. Squeeze the water through into a cup. There's no hard sucking, so it's easier for kids and older relatives.

🍲 Fill a pan or a bowl. Let the water run through into a clean container for cooking, washing up and keeping yourself clean.

🗄️ Put it away and forget it. Nothing to charge, no tablets, and no expiry date when it's stored dry.

Limited Time Sale

Get Up To 67% OFF Now!

PureFlow is having a limited time sale right now where you can get the PureFlow Emergency Water Filter Straw for up to 67% off. Click the button below to get yours now before this deal goes away!

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Get PureFlow For Up To 67% OFF Now!

One Per Person. Home, Car, and Bag.

Water is personal. With one straw in a family of four, someone's always waiting their turn.

 

That's why PureFlow sells them in multipacks, so every person in the house has their own.

 

Then think about where you'll be. A straw in the kitchen drawer doesn't help if you're stuck in the car on a closed road, or caught out on a walk. So it's worth keeping one in the car and one in your bag too.

 

And think about who else counts on you. Your mum and dad. The in-laws. The neighbour who lives on her own.

 

Multipacks bring the price of each straw right down, so covering everyone doesn't cost much.

Do It While the Tap Still Works

Nobody's asking you to panic, or to turn the spare room into a bunker.

 

You don't have to call yourself a prepper. You just need an answer to one question.

 

When the bottles are gone, what will your family drink?

 

The best time to sort that out is on a normal day, when the shops are calm, and the tap is running. When the water goes off, everybody in town goes looking for the same things at the same time.

 

PureFlow is currently discounting its Emergency Water Filter Straw by up to 67%. Current pricing is on the company's site.

Get Your PureFlow Emergency Water Filter Straw For Up To 67% Off Now!

It's backed by a 30-day money-back guarantee.

Limited Time Sale

Get Up To 67% OFF Now!

PureFlow is having a limited time sale right now where you can get the PureFlow Emergency Water Filter Straw for up to 67% off. Click the button below to get yours now before this deal goes away!

00
HRS
00
MIN
00
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Get PureFlow For Up To 67% OFF Now!

Why PureFlow Shows You the Limits

PureFlow puts what its straw does and what it doesn't do side by side. No virus claims. No "drink from anything" promises. Just a filter that does one job, and the factory test results to back it up.

 

This is a paid advertisement for PureFlow.

Sources

  1. Cabinet Office, "UK Public Survey of Risk Perception, Resilience and Preparedness 2026: Headline Findings," 19 August 2026
  2. South East Water, "South East Water issues a boil water notice for 24,000 customers," 3 December 2025
  3. Sky News, "South East Water restores supply to homes in Kent and Sussex after week of chaos," January 2026
  4. UK Parliament, Hansard, "National Energy System Operator: Blackout Risk," 15 July 2026
  5. ITV News, "Cyber-attacks, heatwaves and power cuts: Why Britons are being told to prepare," 15 July 2026
  6. National Cyber Security Centre, "NCSC CEO: Hostile states linked to three-quarters of cyber attacks affecting UK's critical systems," 17 June 2026
  7. HM Government, Prepare, "Water supply interruptions or outages," accessed 14 October 2026

 

Disclaimers

  • Filter, not a purifier. PureFlow filters bacteria and sediment. It doesn't remove viruses, chemicals, chlorine or heavy metals. Use it on fresh water only, never floodwater or seawater.
  • Capacity. Rated for up to about 4,000 litres on tap water. Murky or muddy water clogs it sooner.
  • Storage. No expiry date when stored dry. Don't let it freeze once it's been wet. Shake out the water and let it dry fully before storing.
  • Testing. E. coli and cloudy-water results come from factory testing. Details available on request.
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