If you feel the need to filter your water to purify it, because you are not satisfied with the taste or for the sake of acting in an eco-responsible way, now it is very easy to achieve this. All you need to do is place one or more filters at different points in your home’s water distribution network. You can filter the water from the supply network as well as the rainwater that you can collect. Similarly, if your water comes from your well or a catchment, it is sometimes necessary to make some changes to improve the quality of your water. If plumbing isn’t your forte, installing a water filter is pretty straightforward, but you can still hire a professional for a proper installation. The use of a water filter is not necessarily intended for personal consumption, it can also be used to preserve your household appliances (for example from limestone which can make up the water), or to preserve the installation of your central heating. There are several solutions to filter the water in your home, the filters can be placed upstream of your shower supply, or even at the level of the kitchen sink. Among the filtering solutions, you can also opt for unconnected filters, such as with filter jugs, filter cartridges, or even osmosis. Among the water filters you can in your home are:

Classic filtration;
Microfiltration;
Ultrafiltration;
Nanofiltration;
Reverse osmosis.（https://www.simpurelife.com/pages/pfas-water-filter-system）

The latter is the most common as home filtration, it usually uses a combination of filters to purify the water in the most efficient way possible.