Whole-House Filters
A whole-house filter treats water at the point it enters your home, addressing sediment, chlorine taste, and odor across every tap.
Short answer: Whole-house filters are sized to your home's flow rate and the specific issue (sediment, chlorine taste/odor) identified in your CCR. They are not a substitute for point-of-use treatment like reverse osmosis for contaminants such as PFAS or lead.
What they address well
- Sediment and particulates
- Chlorine taste and odor
- General aesthetic improvements across every faucet
What they generally don't address alone
- Dissolved contaminants like PFAS or nitrate, without a certified media specifically rated for them
- Lead, unless the specific cartridge is certified for lead reduction
- Hardness (that's a softener's job — see Water Softeners)
Step-by-step
- Identify the specific issue from your CCR or a test result.
- Choose a system sized to your household's peak flow rate, not just square footage.
- Confirm the cartridge is certified (NSF/ANSI) for your specific concern.
- Follow the manufacturer's filter replacement schedule (see Filter Replacement).
Common mistakes
- Assuming a generic sediment filter addresses chemical contaminants
- Undersizing a system for household water demand, causing pressure loss
Official sources
- NSF/ANSI certification standards
- U.S. EPA point-of-entry treatment guidance
Related
Does a whole-house filter remove PFAS or lead?
Only if the specific cartridge is certified for that contaminant. A generic sediment or carbon filter is not automatically rated for PFAS or lead reduction.
This page provides general educational information and does not endorse a specific manufacturer or product claim.
Last reviewed: 2026-07-11. Report a correction.