Point-of-use activated carbon filters are most effective for removing which of the following?

• A. Inorganic chemicals
• B. Radon
• C. Gases
• D. Tastes and odors

Answer: (A)

Activated carbon works mainly through adsorption, using its porous surface to trap molecules that cause taste and odor as water passes through. This makes point-of-use carbon filters especially effective at removing chlorine-related tastes and odors and many volatile organic compounds, which are common contributors to a water’s smell and flavor. Inorganic chemicals—those are mineral salts and ions—don’t bind well to activated carbon, so they tend to pass through the filter. Radon and other dissolved gases present their own challenges; carbon filters may remove some, but they aren’t a reliable or comprehensive solution for radon at the point of use. So, the strongest, most predictable benefit of these filters is improving taste and odor rather than removing most inorganic contaminants or fully addressing dissolved gases.