How to Identify Water Filter Pitchers That Effectively Remove PFAS

Concerns about contaminants in drinking water have led to a surge in the availability of water filters, each promising to reduce various impurities such as chlorine, PFAS, heavy metals, and pharmaceuticals. While most water systems comply with federal standards, new regulations for PFAS and PFOA will not be mandatory until 2031, prompting consumers to seek effective filtration solutions.

To determine the credibility of water filter claims, certifications and independent testing are crucial. The most reliable certifications are those adhering to NSF/ANSI standards. The NSF, a nonprofit organization, develops testing standards for water filters, while ANSI accredits organizations like NSF to conduct these tests. Three main NSF/ANSI standards apply to home water filters: NSF/ANSI 42 for aesthetic effects, NSF/ANSI 53 for health effects, and NSF/ANSI 401 for emerging contaminants.

Verification of a filter's certification can be done through the NSF, Water Quality Association (WQA), and IAPMO websites. These organizations ensure that tests adhere to protocols and include ongoing audits. For instance, the NSF offers a product search tool to verify certifications, and the WQA provides a similar service with its Gold Seal program.

A case study of the Clearly Filtered water pitcher illustrates the complexity of verifying certifications. This pitcher claims to remove up to 365 contaminants, including PFAS, while maintaining beneficial minerals. It has been tested by IAPMO's QFT division, which is certified to NSF/ANSI standards. Although not currently listed as certified by IAPMO, it holds certifications from NSF and WQA for chlorine removal and lead-free manufacturing. Clearly Filtered is transitioning its PFAS certification from WQA to NSF, highlighting the dynamic nature of certification processes.

Other brands, like Brita, also face certification complexities. While some models are certified for lead removal by NSF, others using the same filter are certified by WQA. Consumers are advised to look for filters using granular activated carbon, ion exchange resin, or reverse osmosis, as recommended by the EPA for PFAS removal.

Ultimately, navigating water filter certifications requires diligence, as not all products are equally verified. Consumers should look for third-party testing and clear identification of testing labs to ensure the efficacy of their chosen water filters.