Water Purification Tablets

Chemical tablets that kill bacteria, viruses, and parasites in water. Lightweight backup to mechanical filtration.

Why It Matters

Purification tablets are the ultimate backup water treatment. They weigh almost nothing, last for years, and can treat water even when your filter breaks or freezes. Unlike filters, tablets also kill viruses — making them essential for comprehensive water safety.

Features to Look For

Active ingredient

Chlorine dioxide is most effective and leaves least taste. Iodine works but has a stronger flavour.

Treatment time

Most tablets need 30 minutes for bacteria. Cryptosporidium may need 4 hours.

Shelf life

Unopened tablets last 4–5 years. Check expiry dates regularly.

Common Mistakes

Not waiting long enough

Drinking before the treatment time is up means you’re drinking unsafe water.

Using in very cold water

Chemical reactions slow in cold water. Double the treatment time below 5°C.

People Also Need

People also need

Water Filter

Portable water filtration for safe drinking water from any freshwater source. Removes 99.99% of bacteria and parasites.

Collapsible Water Bottle

Flexible water container that rolls up flat when empty. Essential for carrying treated water from source to camp.

Related Guides

Water Purification Methods Compared: Filters, Tablets, and UV

A detailed comparison of the three main water purification methods available to UK preppers — including cost, effectiveness, portability, and which UK water sources each method suits best.

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