Best Water Filters for Home (2025): RO vs Carbon vs Pitcher
Clean drinking water matters. Here’s what to buy based on your needs and contaminants.
For all environment guides, see: Best Air Purifiers for Home.
Filter Types Compared
| Type | Removes | Price (~) |
|---|---|---|
| Reverse Osmosis (RO) | Most contaminants | $200-500 + install |
| Under-sink carbon | Chlorine, taste, some chemicals | $100-300 |
| Pitcher (Brita etc.) | Basic chlorine, taste | $20-50 |
| Countertop (Berkey) | Wide range | $200-400 |
Reverse Osmosis (RO)
Most thorough filtration available:
- Removes: 95-99% of dissolved solids, heavy metals, fluoride, chemicals
- Installation: Under-sink, requires tank
- Downside: Removes minerals too—needs remineralization
Pros
- Most thorough filtration
- Removes heavy metals, chemicals, fluoride
- Clean-tasting water
Cons
- Removes beneficial minerals—needs remineralization
- Wastes some water in process
- Requires installation
Important: RO water is “dead” water without minerals. Add remineralization filter or mineral drops.
Best RO Systems
| Product | Price (~) | Notes |
|---|---|---|
| APEC Top Tier | $200-250 | Great value, well-reviewed |
| AquaTru Countertop | $400-500 | No installation needed |
| iSpring RCC7AK | $250 | Includes remineralization stage |
Under-Sink Carbon Filters
Effective without removing minerals:
- Removes chlorine, taste, odor
- Some remove lead and cysts
- Keeps minerals intact
Best picks: Aquasana, Clearly Filtered
Pitcher Filters
Basic filtration for renters:
- Brita: Basic chlorine/taste (~$25)
- ZeroWater: More thorough TDS reduction (~$35)
- Clearly Filtered: Better contaminant removal (~$70)
Know Your Contaminants
Check your water quality report (available from utility):
- Lead: Need RO or certified carbon filter
- Fluoride: Only RO removes effectively
- Chlorine: Any carbon filter works
- PFAS: RO or specialized filters
Remineralization Options
If using RO, add minerals back:
- Remineralization filter stage
- Mineral drops (Trace Minerals, ConcenTrace)
- Pinch of Celtic/Himalayan salt per glass
Verdict
For most thorough: RO system with remineralization.
For basic improvement: Under-sink carbon filter.
For renters: High-quality pitcher (Clearly Filtered > ZeroWater > Brita).
For all environment guides, see: Best Air Purifiers for Home.