The NSF is the national sanitation foundation, a not-for-profit that certifies products for water treatment. They ask for samples of the product and do their own extensive testing to see it if meets the claims of the manufacturer. They also do yearly inspections to ensure it stays compliant. Having this certification means you can trust the product. The one caveat is the manufacturer only needs to treat one contaminant in the standard to be certified. For example, you only need to reduce lead to get the NSF 53 stamp even though the standard contains over 50 contaminants. That’s why you need to visit the NSF website and search for the product to see what it’s certified to clean.
The WQA (Water Quality Association) is another not-for-profit organization that certifies products just like the NSF. They both follow the same NSF/ANSI standards.
Brita® Faucet Filtration System FF-100/SAFF-100
NSF Certification 42: Chlorine Reduction, Nominal Particulate Reduction – Class I, Taste and Odor Reduction
NSF Certification 53: Asbestos Reduction, Chlordane Reduction, Lead Reduction, Toxaphene Reduction, VOC Reduction*
NSF Certification 401: Bisphenol A Reduction, Estrone Reduction, Ibuprofen Reduction, Naproxen Reduction, Nonylphenol Reduction, Phenytoin Reduction
Zero Water ExtremeLife Faucet Mount Water Filter
WQA Certification NSF 53: Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA)
WQA Certification NSF 42: Aesthetic Chlorine, Nominal Particulate Class I, Taste and Odor
WQA Certification NSF 372: Nothing to do with filtration. Only certifies product contains less than 0.25% lead.
They do mention that they are able to reduce lead by 98%. I assume they sent a water sample to a lab (Third Party). It’s cheaper to run the test yourself and send a water sample to a lab to see how effective your filter is. The problem is you have to trust the water sample sent was in fact the filtered water. I would take this with a grain of salt unless you do your own tests and water samples.
PUR Plus PFM200B
NSF Certification 42: Chlorine Reduction, Nominal Particulate Reduction – Class I, Taste and Odor Reduction
NSF Certification 53:
2,4,5-TP (Silvex) Reduction
2,4-D Reduction
Asbestos Reduction
Atrazine Reduction
Benzene Reduction
Carbofuran Reduction
Carbon Tetrachloride Reduction
Chlordane Reduction
Chlorobenzene Reduction
Endrin Reduction
Ethylbenzene Reduction
Heptachlor Epoxide Reduction
Lead Reduction
Lindane Reduction
Mercury Reduction
Methoxychlor Reduction
O-Dichlorobenzene Reduction
Simazine Reduction
Styrene Reduction
Trihalomethanes (TTHM) Reduction
Tetrachloroethylene Reduction
Toluene Reduction
Toxaphene Reduction
Trichloroethylene Reduction
VOC Reduction **
NSF Certification 401:
Atenolol Reduction
Bisphenol A Reduction
Carbamazepine Reduction
DEET Reduction
Estrone Reduction
Linuron Reduction
Meprobamate Reduction
Metolachlor Reduction
Nonylphenol Reduction
TCEP Reduction
TCPP Reduction
Trimethoprim Reduction