Best water storage & purification for emergencies (2026)

Who it's for: The buy-once reserve — the only WRAS/DWI potable-rated tank here, UK-made, 10-year warranty.

If you want a fixed water reserve done properly, this is the grown-up option: a UK-manufactured 300-litre tank actually approved for potable storage (WRAS and DWI), with a 10-year warranty and a 600mm round footprint that tucks into a garage corner. That approval is the difference between 'food-grade plastic' and 'certified for drinking water systems'. Full it's around 300kg, so it wants level, load-bearing concrete — a garage or slab, never decking — and stored water still deserves periodic rotation.

Who it's for: A cheap, compact backup for disinfecting clear tap or stored water if the mains supply is compromised.

The most widely trusted purification tablet in the world, and a sensible few pounds to keep in any grab bag. It disinfects clear water reliably, but it is not a filter, so treat it as one layer of your water plan rather than the whole answer.

Don't buy if Your likely water source is cloudy, silty or chemically contaminated. Tablets only work on clear water, so in that case choose or add a proper filter rather than relying on these alone.

Who it's for: The clever middle ground — 40 litres one person can actually move.

The caravan world solved a problem preppers argue about: how one ordinary person moves 40kg of water. The Aquaroll rolls it — kitchen to car boot to garden tap — on a UK-made, food-grade body with a 10-year warranty. For household resilience it's the most practical single container here, because capacity you can't move is capacity you won't use. Check you're buying this Premium (virgin food-grade plastic) rather than the cheaper recycled-plastic Economy, and treat it as fill-use-empty kit: rotate rather than leaving it static for months.

Who it's for: The step past jerry cans — a week-plus of household water in one food-grade tank.

Two hundred and ten litres is where water storage stops being containers and becomes a reserve — roughly a week of drinking and basic-hygiene water for a family, in a genuinely food-grade baffled tank with a proper dispensing tap, from a UK specialist rather than a repurposed drum of unknown history. Site it before you fill it: at ~225kg full it never moves again, so decant from the tap and rotate the contents roughly every six months. It isn't WRAS-approved for mains plumbing — fill by hose, don't plumb it in.

Who it's for: 150 litres the modular way — six cans you can lift beats one tank you can't.

The alternative philosophy to the big tanks: split 150 litres across six UN-approved, food-grade, interlocking 25-litre cans. Each is 25kg full — heavy but liftable — so water can go where it's needed: two in the car, one in the kitchen, three in the shed. No pump needed, no single point of failure, and the stack footprint is one cupboard corner. The cost is faff: six caps to check and six cans to rotate every six months, and mind the near-identical 20L pack sold alongside this one.

Who it's for: The ceiling of home water storage — and only ever buy one NEW.

A tonne of water in a caged, palletised, certified-new food-grade tank: this is the whole-household reserve, and honestly more than most homes need — two or three smaller tanks are usually the better buy. The reason this exact unit earns its place is the word NEW: reconditioned IBCs on eBay for £100–£180 previously held unknown chemicals, and no amount of rinsing makes that a drinking-water tank. If you want the full 1,000 litres, buy certified-new from a specialist, site it on solid concrete, and accept it will never move again.

Who it's for: Bulk water storage at home, or for camping and caravan trips.

A sturdy, food-safe rigid container that holds a useful 26 litres of water, and a long-standing favourite for storing it. The rectangular shape stacks and stores neatly, though the tap and vent cap are the parts most likely to need eventual replacement.

Don't buy if Don't buy if you'll regularly need to carry it full - 26 litres of water weighs about 26kg, which is a lot to lift or move about; a couple of smaller containers may suit better. Also avoid relying on it for long-term storage in direct sunlight, which degrades the plastic.

Who it's for: Households wanting modular, stackable long-term water storage that tucks into cupboards, wardrobes and under beds.

A genuinely rugged, food-grade HDPE container whose interlocking design stores water tidily in awkward spaces and doubles for dry food. Worth knowing there is no true 8-litre model: the standard unit holds about 13 litres (3.5 US gallons) and is usually sold in multi-packs, so it is dear per litre and around 13kg when full.

Don't buy if You just want the cheapest bulk emergency water: a plain 25L jerrycan or a bath-filling WaterBOB gives far more litres per pound and per cubic foot; the WaterBrick earns its price only if you specifically need the stackable, modular format.

Who it's for: Cheap, robust bulk water storage kept at home for a stay-at-home emergency.

A plain, food-grade rigid jerry can is one of the most cost-effective ways to store the several litres per person, per day that the government suggests keeping in. It is unglamorous but does the job, and stacks neatly in a garage or under the stairs.

Don't buy if You want water you can grab and carry out the door - at 25kg full this is a keep-at-home container, so choose smaller 5-10L cans or a wheeled option if portability matters.

Who it's for: A compact water-disinfection backup for a grab bag or emergency water store.

A reliable, no-fuss way to make questionable water safe to drink when you can't boil it. Chlorine dioxide handles viruses, bacteria and cysts with little aftertaste, which makes these a sensible line of defence in any household kit.

Don't buy if Don't rely on tablets alone if your likely water source is muddy or debris-laden, or you need to remove chemical contaminants - pre-strain and pair with a filter, or choose a pump/gravity filter instead. And if you can safely boil water, that already does the job for free.

Who it's for: Cheap, packable back-up water storage you can fill ahead of a planned supply interruption.

A sensible, low-cost way to keep spare water capacity in a cupboard until you need it, and 15L is a practical amount for one person's drinking water over a couple of days. Treat it as short-term standby storage rather than a rugged, fill-and-forget container.

Don't buy if You want water you can store filled for months, or a container that shrugs off being knocked about in a garage or car boot; a rigid HDPE jerrycan is the better buy there.

Who it's for: Households with a standard bathtub who want a large, cheap water reserve to fill when a supply interruption is forecast.

A clever, low-cost way to bank around 380 litres of clean water in your bath when you get warning of a supply cut, and it packs away to nothing the rest of the time. Its weakness is that it only helps if you have a standard bathtub and enough notice to fill it, and it is effectively single-use once opened.

Don't buy if Skip it if you only have a shower, or if you want a reserve that is always ready to go, in which case a few rigid water containers kept filled will serve an unannounced outage better.