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Top > Home > Consumer Information > Appliances > Water Filters Treatment Systems for Household Water Supplies - Activated Carbon Filtration 1992 article from the North Dakota State University Extension Service explaining in detail what activated charcoal systems can and cannot do. HowStuffWorks: Charcoal Filters What is activated charcoal and why is it used in filters? HowStuffWorks: Reverse Osmosis How does reverse osmosis work to purify or filter the water? Home Water Treatment Using Activated Carbon Discussion and guidelines from a 1997 article from the Michigan State University Extension.
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