There are several ways to clean tap water with different filters:

Activated carbon filters may remove certain organic contaminants that change the taste and flavor. Some are supposed to remove the byproducts of chlorination, solvents, pesticides, and some metals, such as copper or lead.
Ion exchange units with activated alumina may remove calcium and magnesium that make water hard. Such filters are usually used with other filtration methods, such as reverse osmosis.
Reverse osmosis filters can remove nitrates and sodium as well as pesticides, fluoride, chloride, and petrochemicals.
Distillation units will boil water and collect the vapor, turning regular water into distilled water.

It’s important to remember no filter can remove all contaminants. Before installing any of them, it’s better to know what the water in your system contains and choose the filter based on that.

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