Contaminant Reduction Claims

At NSF, we certify a wide variety of water treatment systems from filtration to reverse osmosis designed to reduce contaminants. To help you find the best water filter for your home or office, we have listed certified products based on the contaminants we are regularly asked about. Keep in mind that if a filter type is not listed, there may be no systems of that type certified to reduce that specific contaminant. Contact us with your questions.

Lead

View all filters and systems certified by NSF to reduce lead.

• Water Pitchers With Filters
• Faucet Filters
• Under-Sink Filters
• Reverse Osmosis Filters
• Counter-Top (Manual-Fill) Filters
• Counter-Top Filters Connected to a Sink Faucet
• Refrigerator Filters
• Aftermarket Refrigerator Filters
• Integrated Refrigerator Filters

Arsenic (Pentavalent) for Treating Incoming Levels of <=50 ppb

View all filters and systems certified by NSF to reduce arsenic less than 50 ppb.

• Under-Sink Filters
• Water Pitchers With Filters
• Reverse Osmosis Systems

Bacteria/Coliform/Cyst/Virus

• Ultraviolet Light Treatment Systems
• Microbiological Treatment Systems

Chlorine

View all filters and systems certified by NSF to reduce chlorine.

• Whole House Systems
• Faucet Filters
• Water Pitchers With Filters
• Counter-Top Filters Connected to a Sink Faucet
• Counter-Top (Manual Fill) Filters
• Under-Sink Filters
• Reverse Osmosis Systems
• Refrigerator Filters
• Integrated Refrigerator Filters
• Aftermarket Refrigerator Filters

Chloramine

View all filters and systems certified by NSF to reduce chloramine.

• Faucet Filters
• Counter-Top Filters Connected to a Sink Faucet
• Counter-Top (Manual-Fill) Filters
• Under-Sink Filters
• Reverse Osmosis Systems

Chromium (Hexavalent)

View all filters and systems certified by NSF to reduce hexavalent chromium.

• Water Pitchers With Filters
• Reverse Osmosis Systems

Fluoride

• Reverse Osmosis Systems

Nitrate/Nitrite

• Reverse Osmosis Systems

PFOA/PFOS

View all filters and systems certified by NSF to reduce PFOA/PFOS.

• Counter-Top Filters Connected to a Sink Faucet
• Counter-Top Filter Machine
• Under-Sink Filters
• Reverse Osmosis Systems
• Refrigerator Filters
• Refrigerator Filters (Aftermarket)
• Refrigerator Filters (Integrated)
• Water Pitchers With Filters
• Whole-House Filters

Total Trihalomethanes (TTHM) and Volatile Organic Compounds (VOCs)

View all filters and systems certified by NSF to reduce VOCs including TTHM.

• Whole House Filters
• Faucet Filter
• Water Pitchers With Filter
• Counter-Top Filters Connected to a Sink Faucet
• Counter-Top (Manual-Fill) Filters
• Under-Sink Filters
• Reverse Osmosis Systems
• Refrigerator Filters
• Integrated Refrigerator Filters