Faucet water filters are a step-up from the water filter pitcher in terms of how many contaminants they filter. The most effective faucet filters use a multi-stage filtration method.
The biggest challenge is finding one that fits snug on your faucet and does not leak.
However, since they are so inexpensive, many customers have been willing to try different filters to find the “perfect one.” The faucet filter is the most economical choice of tap water filters that selectively filter contaminants, without removing healthy minerals.
The top brands to choose from in this category include Culligan and PUR. Each offers varying degrees of filtration of unhealthy contaminants while leaving essential minerals in the water.
PUR's faucet filter offers the best filtration for this type of water filter, but the Culligan brand has higher customer ratings for ease of use and less leakage and breakage.
If I were to choose this type of water filter, I think I would choose Culligan, mainly because it does provide adequate filtration and I couldn't stand the leakage and more frequent breakage as noted in the PUR online reviews (that is, if we can even trust the reviews are real).
These companies offer high-quality faucet water filters ranging in price from about $20 to $40.
Culligan’s best faucet filter is WQA-certified to reduce chlorine, other bad tastes and odor, lead, lindane and atrazine, light sediment and particulate class 1. It also has the highest ratings (by far) for faucet filters on Amazon.com for customer satisfaction and does not have as many problems with leakage as other faucet filters.
PUR’s three-stage faucet water filter is NSF-certified to filter up to 30 contaminants, including up to 99 percent of chlorine, heavy metals, industrial pollutants, pharmaceuticals, and microbial cysts, like cryptosporidium and giardia. It was rated best buy in 2010 by ConsumerSearch.com. This filter is a good value for the price.