What Is WQA? The Water Quality Association Gold Seal

If a filter or softener box shows a gold seal with “WQA” on it, the product was certified by the Water Quality Association rather than by NSF. For the claims it lists, that’s a real certification.

Is WQA certification as good as NSF?

For the same standard and the same claim, yes: the product was tested against the same NSF/ANSI standard. WQA says its Gold Seal program tests and certifies drinking water treatment units, softeners and other products to NSF/ANSI standards, and that it is accredited for this by ANAB (the ANSI National Accreditation Board) and the Standards Council of Canada. The EPA lists WQA among the five ANSI-accredited bodies that certify home filters for PFAS reduction, alongside CSA Group, IAPMO R&T, NSF and UL.

Certification isn’t a one-time test. WQA says certified products must be retested regularly and their factories inspected every year, and a Gold Seal certificate is issued for no more than five years from the earliest test completion date.

It’s worth knowing that WQA is also a trade association representing the water treatment industry. That’s no reason to dismiss the seal, since the certification program is accredited, but it’s one more reason to judge a product by its listing rather than by its marketing.

How do you look up a WQA-certified product?

Use WQA’s certified product listings. You can search by manufacturer, brand or model, by product standard and by reduction claim. Then check three things:

• the exact model number of the system and of its replacement cartridge,
• the standard (NSF/ANSI 53 for most health claims, 58 for reverse osmosis, 44 for softeners), and
• the contaminant you care about, listed as a reduction claim for that model.

If the contaminant isn’t on the listing, the product isn’t certified for it, whatever the box says. On this site that claim gets the label “Maker claim only”, or “Lab-tested only” if the maker publishes an independent lab report. That’s how we checked the filters in our guide to filters that remove PFAS.

Before you shop, find out what’s in your water: a water quality report for city water, or a lab test for a well.