Best Countertop Water Filters of 2026
Make room for cleaner tap water with these top-rated filters
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Tired of water bottles overstuffing your recycling bin? A countertop water filter can be a convenient—and money-saving—alternative.
Like faucet-mounted and pitcher-style filters, countertop water filters are a good option for renters who might not have their landlord’s permission to tie a water-purifying system into their plumbing. But unlike faucet-mount units, countertop filters won’t get in the way of filling pasta pots, and most provide clean water faster than slow-filtering pitchers. Some are fairly portable, and their cartridges typically have a longer life than those of pitchers or faucet-mounted filters (though shorter than under-sink filters).
There are two basic types of countertop water filters: those that connect via a hose to your faucet, and those with a reservoir that you fill manually. Those with reservoirs rely on either gravity or an electric pump to move water through the filter.
Countertop filters that connect to your faucet deliver filtered water as soon as you turn on the tap. Installation is straightforward, and a diverter lets you switch between filtered and unfiltered water as needed.
Reservoir-style countertop filters must be manually filled and, with capacities ranging from a half-gallon to several gallons, take up as much space on your countertop as a typical coffee maker. Those that rely on gravity remove contaminants by slowly trickling water through a cartridge, delivering purified water through a spigot on the bottom. Other models use a plugged-in or battery-operated pump to force water through the filter cartridge and into a connected carafe or a glass. Electric dispensers filter a bit slower than faucet-connected countertop filters but are typically faster than pitchers. The fastest countertop models in our ratings filter a quart of water in 15 seconds, while the slowest takes just under 1 minute. By comparison, water filter pitchers we tested took 1 to 43 minutes from start to finish.
All of the countertop water filters CR has tested use carbon filters. There are countertop models that use reverse osmosis technology, which can remove a wider range of contaminants. But they use significantly more water during the filtration process, and CR has not tested them. We do, however, test under-sink reverse-osmosis water filters.
Best Countertop Water Filters
How Do Countertop Filters Work?
All of the countertop water filters we test use carbon filtration to clean tap water. These filters are lined with black granular activated carbon, which attracts solid and gaseous contaminants in the water and air that flow through them, similar to how a magnet attracts metals. Activated carbon block technology is effective at filtering out funky tastes and odors, chlorine, sediments, and sometimes even lead, solvents, and pesticides, according to the Centers for Disease Control and Prevention. Carbon-block filters are not effective at eliminating bacteria, however.
If you’re concerned about contaminants in your tap water, get a Consumer Confidence Report from your water supplier, or, if you have a well, have your water tested. Then choose a filter that’s certified to remove whatever concerning substances those tests reveal. Don’t assume that all filters are the same or use the same technology. For example, according to the CDC, filters that remove chemicals may not effectively remove germs and vice versa.
How CR Tests Water Filters
We test a water filter’s flow rate by measuring how long it takes to filter 1 quart of water. We also give each filter a “clogging” score based on how much its flow rate slows down over the cartridge’s stated life. If a manufacturer claims that a filter meets accepted standards for removing specific contaminants, such as chlorine, lead, and PFAS, we verify those claims.
We also verify claims of flavor and odor reduction by spiking spring water with commonly found compounds that can make the water smell or taste like damp soil, metal, a sewage treatment plant, or a swimming pool. A trained panel of professional tasters evaluates how effectively the filters remove those flavors and odors.
All countertop filters in our ratings effectively remove bad tastes and odors from tap water. But most top-rated hose-connected models also deliver filtered water quickly and continue to do so without clogging over the lifespan of the filter cartridge.
