Water Purification Methods

Water. A substance none of us can survive without. Every living cell in the human body needs water to function. The maximum time we can go without water is approximately a week as we need it for hydration, but in order to drink it safely, the water needs to be purified. Water purification is the removal of contaminants in raw water, to produce drinking water that is pure enough for human consumption. Contaminants can include cryptosporidium, giardia, bacteria, algae, viruses, fungi, minerals and man-made chemical pollutants. There are tons of water purification methods and listed below are some of the ways that water can be purified.



This purification technology involves using a filter to remove particles and solid matter from liquid, thus providing ‘clean and pure’ water. Water filter systems are used in a plethora of businesses, and at a domestic level in our homes.


Using gravity, this process allows particles suspending in water to settle out of the suspension. These particles then become sediment.


This method purifies water through boiling and cooling. When water is heated past a certain point, vapour is formed and then the vapour is condensed to form liquid again. The process is used to separate substances that have a different boiling point in a liquid for purification purposes.

Slow Sand Filters:

This is a procedure where contaminated water goes through a sand filter which is a container with a system of pipes with holes.  The container is covered by 6 inches of gravel, which in turn is covered by 3 feet of sand. Contaminated water flows over the top of the sand, through to the gravel and then to the pipes on the bottom. Interestingly, there are microorganisms present in sand that break down toxins in water, further purifying it. Through hydraulic pressure, water (which is now purified) then flows back up.

Reverse Osmosis:

This is a biological process where water is pushed through a semi-permeable membrane under pressure, thereby removing the majority of the contaminants in the water.

Ultraviolet Light:

Excellent for disinfecting bacteria and waterborne pathogens from water, ultraviolet light works by disabling bacteria and viruses by attacking their DNA.


This is a physical process whereby a polymer induces the settling of particles in water, which eventually grows into a large flake.


This is a chemical process whereby a coagulant is mixed with water to destabilise colloidal suspensions.


These water purification methods are only a handful of the effective processes we have available today to purify water. On the hunt for expert water filters and commercial water softeners? Look no further than European WaterCare, the UK’s leading independent manufacturer of commercial water softeners, water filters and calcium treatment units.


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