Our top picks across all categories after testing 50+ filters.
| Category | Winner | Price |
|---|---|---|
| Best Overall | Aquasana Rhino EQ-1000 | $1,000 |
| Best Under Sink | Clearly Filtered 3-Stage | $450 |
| Best RO System | Waterdrop G3P800 | $550 |
| Best Pitcher | Clearly Filtered Pitcher | $80 |
| Best Budget | Brita Longlast Pitcher | $35 |
The Aquasana Rhino is our top whole house pick for most homes. It removes 97% of chlorine, reduces lead, mercury, VOCs, and other contaminants while maintaining excellent water flow. The 10-year, 1-million gallon capacity means minimal maintenance.
Pros: Long lifespan, no drop in water pressure, removes wide range of contaminants, includes pre-filter and post-filter, professional installation available.
Cons: Higher upfront cost, requires professional installation for most homeowners, doesn't soften water.
Best for: Homeowners on city water who want filtered water at every tap.
Check Price on Amazon →For more whole house options, see our complete whole house filter guide.
Clearly Filtered's 3-stage system removes an impressive 365+ contaminants using their proprietary Affinity Filtration Technology. It's one of the few under-sink systems that removes fluoride, lead, PFAS, and pharmaceuticals without the waste water of RO systems.
Pros: Removes more contaminants than most competitors, no water waste, retains beneficial minerals, dedicated faucet included.
Cons: Higher filter replacement cost ($150/year), slower flow than some competitors.
Best for: Anyone who wants maximum contaminant removal without reverse osmosis.
Check Price on Amazon →For more under sink options, see our complete under sink filter guide.
The Waterdrop G3P800 represents the new generation of tankless RO systems. It produces 800 gallons per day with a 3:1 pure to drain ratio (much better than traditional RO). The smart LED faucet shows real-time TDS readings.
Pros: Tankless design saves space, fast flow rate, efficient water usage, smart TDS monitoring, easy filter changes.
Cons: Higher upfront cost than tank systems, requires electricity.
Best for: Anyone wanting maximum purification with modern convenience.
Check Price on Amazon →For more RO options, see our complete reverse osmosis guide.
The Clearly Filtered pitcher outperforms every other pitcher we tested by a wide margin. While Brita removes about 5-10 contaminants, Clearly Filtered removes 365+ including fluoride, lead, PFAS, glyphosate, and microplastics.
Pros: Far superior filtration to Brita/PUR, removes fluoride (rare for pitchers), BPA-free, lifetime guarantee on pitcher.
Cons: Slower filtration, more expensive filters ($50 every 4 months), smaller capacity than some pitchers.
Best for: Anyone wanting serious filtration without installation.
Check Price on Amazon →If budget is the priority, the Brita Longlast is a solid basic option. It removes chlorine taste, some lead, and common contaminants. The Longlast filters last 6 months vs 2 months for standard Brita filters.
Check Price on Amazon →For more pitcher options, see our complete water filter pitcher guide.
Our testing process includes:
Do I really need a water filter?
It depends on your water quality. City water is treated but may contain chlorine, lead (from pipes), PFAS, or other contaminants. Well water is unregulated and may have bacteria, nitrates, or heavy metals. Test your water first to know what you're dealing with.
What type of filter should I get?
For most people on city water, an under-sink filter or quality pitcher is sufficient. If you have serious contamination or well water, consider whole house or RO. See our filter selection guide.
Is reverse osmosis overkill?
For most city water, probably yes. RO removes everything including beneficial minerals. It's best for those with high TDS, fluoride concerns, or serious contamination. A quality carbon filter handles most common contaminants.
How often do I need to change filters?
It varies by filter type and your water usage. Pitchers: 2-4 months. Under-sink: 6-12 months. Whole house: 6 months to several years. Always follow manufacturer recommendations and watch for reduced flow or taste changes.