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EWG’s UPDATED Water Filter Buying Guide

Find the right filter for your water – and budget

EWG’s UPDATED Water Filter Buying Guide

Wednesday, February 27, 2013

EWG’s UPDATED Water Filter Buying Guide

Find the right filter for your water – and budget

EWG's Water Filter Buying Guide

How to choose a filter system that meets your needs

Cuno SQC4

Manufactured by
System type
Rated lifespan
Filter technology
reverse osmosis

California Department of Public Health Certification

Certification number: 08-1902
California certifies this filter reduces: Toxaphene, Selenium (total), Radium-226, p-Dichlorobenzene, o-Dichlorobenzene, Lead (total), fluoride, Cysts/Bacteria, Copper, Chromium (trivalent), Chromium (hexavalent), Chlorine, Carbofuran, Cadmium (total), Barium (total), Arsenic (total), .
Notes: Do not use where water is microbiologically unsafe or with water of unknown quality, except that systems certified for cyst reduction may be used on disinfected waters that may contain filterable cysts. Claims for arsenic reduction shall only be made on water supplies maintaining detectable residual free chlorine at the system inlet.  Water systems using an in-line chlorinator should provide a minimum of 1 minute chlorine contact time before the filtration system.

NSF Certification

NSF certifies that this filter reduces: Arsenic V; Barium; Cadmium; Chromium 6; Chromium 3; Carbofuran; Chlorine; Copper; Cyst; Flouride; Lead; Nominal Particulate Class 1; O-Dichlorobenzene; P-Dichlorobenzene; Radium 226/228; Selenium; Taste/Odor; TDS; Toxaphene; Turbidity


Find a filter that works best for you:

Water filter type
Filter technology
Certified to reduce

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Updated March 28, 2013

Key Issues: