Consumer-generated reviews, buying tips and advice, ratings, price information, and searchable in a variety of ways from price to product type.

Discussion and guidelines from a 1997 article from the Michigan State University Extension.

What is activated charcoal and why is it used in filters?

How does reverse osmosis work to purify or filter the water?

Presents facts about the different varieties, as well as their features and benefits.

1992 article from the North Dakota State University Extension Service explaining in detail what activated charcoal systems can and cannot do.

Presents compiled data on 10 products on the market. Comparison based on each product's initial purchase price, the quality and ongoing cost of the water they produce, ease of installation and ongoing maintenance requirements.

Offers information about water filters and filtration methods, and buying tips.