Comparison

Compare water filters against your question

Begin with the question or identified treatment goal. Certification is not a blanket claim about all contaminants.

How to use this checklist

Write down the question or identified treatment goal first.
For each option, record the exact model and the reduction claim as it is independently listed for that model.
Copy capacity, installation and the replacement schedule from the official instructions; leave a cell blank until you have checked it.
Compare cost over the same number of years.

Worksheet

Write what the official source says for each option. Leave a cell blank until you have checked it.

Name the options you are comparing

Use the exact model name from the official source. Leave a name blank to keep the default.

Option A name

Option B name

Option C name

Water-filter worksheet: begin with the question or identified treatment goal
Criterion	Option A	Option B	Option C
01Exact model
02Independently listed reduction claim
03Capacity
04Installation
05Replacement schedule
06Cost
07Limitations
	0 of 7 rows filled	0 of 7 rows filled	0 of 7 rows filled

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Healthy Home Audit · Comparison worksheet

Water-filter worksheet

Date

Criterion	Option A	Option B	Option C
Exact model
Independently listed reduction claim
Capacity
Installation
Replacement schedule
Cost
Limitations

A blank cell is a reason to check the official source, not evidence that the option fails. Compare the exact product and region before buying.

Limitations

Certification is not a blanket claim about all contaminants. Match a certification to the specific model and reduction claim.
Do not buy a filter simply because a test package or advertisement uses a broad reassurance claim.

Before you buy

Sources show the date they were accessed. A person has not yet recorded a check date for this page.

NSF: water-treatment standards, NSF (accessed October 13, 2026) — Certification must be matched to a specific model and reduction claim.
EPA: Consumer Confidence Reports, US Environmental Protection Agency (accessed October 13, 2026) — Public-water quality reports and supplier information.