Household water filters are devices designed to improve the quality of drinking water by removing impurities and contaminants. They can be installed at various points in a home, such as under the sink, on the faucet, or as part of a pitcher. Common types include activated carbon filters, reverse osmosis systems, and UV filters, each targeting different pollutants. These filters help reduce substances like chlorine, lead, and sediment, making water safer and more pleasant to drink. Regular maintenance and replacement of filter cartridges are essential to ensure optimal performance and to maintain clean water for household use.