The UK generally has some very clean water, which means it is almost always healthy to drink. However, there are times when it may not taste great, or when it can get discoloured. That might suggest there is a problem.

A range of causes can explain this. United Utilities states that common reasons for this happening include small brown particles in the water, which can be the result of corrosion in metal pipes or sediment. Sometimes this is the result of planned works causing the disruption of settled debris rather than anything being damaged.

This kind of issue causes yellow or brown colouring, while darker grey particles can appear in homes with lead piping, which will mean they were built before 1970.

In most cases, this remains drinkable, whereas blue, pink or green tinges can suggest new copper piping is in place and it should not be used for drinking or cooking.

Of course, you might like to boil that discoloured water or anything that tastes unpleasant, but a mains water filter could be a better bet if you suffer a frequent problem.

A good reason for that is it could save you money. Energy prices have been soaring and the boss of regulator Ofgem Jonathan Brearley has now warned that the energy price cap could rise to £2,800 in October.

While you might want to boil water when you need a cup of tea or coffee, habitually boiling it will use more energy and thus put up your bills. That’s why filtering it instead could be a much better option.

Besides all that, filtered water will keep out those bits of debris and also make it taste better, while a filter that keeps out calcium will prevent limescale building up in your kettle if you live in a hard water area.

So, while unsafe water remains rare, there are still some very good reasons to have a water filter in your home.