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EWG's Tap Water Database

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All water filters that remove nitrate/nitrite

Below are all water filters that have been certified to remove nitrate/nitrite. For more information on these and other filters, see EWG's online water filter buying guide.

EWG fully supports consumers buying water filters from retailers of their choice. In each of the product pages below, for your convenience, we feature a retailer that sells the filter/s that meet your criteria, including small businesses, water filter companies' official websites and Amazon. EWG is not associated with the manufacturer or distributor of any of these products. However, we participate in the Amazon affiliate program and may receive small donations for purchases made on Amazon through our website link.

Note: EWG obtained product pricing information between January and July 2017 from retailers and manufacturers' websites, and we assume no responsibility for the accuracy of product prices on this page.

Product Filter Type Price
3M 4US-RO-S01H Reverse Osmosis Drinking Water Filter System Plumbed-In to Separate Tap $99.99
Aqua Systems PureChoice AQPC-35 Plumbed-In to Separate Tap -
Aqua Systems PureChoice AQPC-435 Plumbed-In to Separate Tap -
Aqua-Pure 3M RO501 Reverse Osmosis Water Filtration System Plumbed-In to Separate Tap $1,942.95
Brita Redi-Twist 3-Stage Water Filtration System USS-335 Plumbed-In to Separate Tap $189.97
Culligan Aqua-Cleer System Plumbed-In to Separate Tap -
DuPont Reverse Osmosis Filtration System WFRO60X Plumbed-In to Separate Tap $177.94
DuPont Reverse Osmosis Filtration System WFRO60X Plumbed-In to Separate Tap $177.94
EcoPure EP-RO25 Reverse Osmosis System Plumbed-In to Separate Tap $179
EcoPure Reverse Osmosis Drinking Water Filtration System ECOP30 Plumbed-In to Separate Tap $157.70
EcoWater Reverse Osmosis Drinking Water System ERO-175 Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375-BK Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375-BN Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375-CP Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375-RB Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375-WH Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375E-BK Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375E-BN Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375E-CP Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375E-RB Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System ERO-375E-WH Plumbed-In to Separate Tap -
EcoWater Reverse Osmosis Drinking Water System HERO-375-BK Plumbed-In -
EcoWater Reverse Osmosis Drinking Water System HERO-375-BN Plumbed-In -
EcoWater Reverse Osmosis Drinking Water System HERO-375-CP Plumbed-In -
EcoWater Reverse Osmosis Drinking Water System HERO-375-RB Plumbed-In -
EcoWater Reverse Osmosis Drinking Water System HERO-375-WH Plumbed-In -
Glacier Bay Reverse Osmosis Drinking Water Filtration System HCGROS5 Plumbed-In to Separate Tap $229
Hague Drinking Water System H6500 Plumbed-In to Separate Tap -
Hague Drinking Water System H6500 Plumbed-In to Separate Tap -
Hahn Filtration Reverse Osmosis Drinking Water Filtration Systems HF-RO Plumbed-In to Separate Tap $229.99
Hellenbrand Millennium Drinking Water System MRO-35 Plumbed-In to Separate Tap -
Hellenbrand Millennium MRO-35GF Plumbed-In to Separate Tap -
Kenmore Refrigerator Water Filter 625.381560 Refrigerator Filter $169.99
Kinetico K5 Drinking Water Station Plumbed-In to Separate Tap -
Kinetico K5 Drinking Water Station Plumbed-In to Separate Tap -
Lancaster Guardian Reverse Osmosis Water Treatment CRO-350 Plumbed-In to Separate Tap -
Lancaster Guardian Reverse Osmosis Water Treatment LRO-35 Plumbed-In to Separate Tap -
LINX 140 Drinking Water System Plumbed-In to Separate Tap -
LINX 140 Drinking Water System Plumbed-In to Separate Tap -
LINX 160 LINX Drinking Water System Plumbed-In to Separate Tap -
LINX 160 LINX Drinking Water System Plumbed-In to Separate Tap -
Marlo Incorporated Reverse Osmosis System TFC-35 Plumbed-In to Separate Tap -
Marlo Incorporated Reverse Osmosis System TFC-35M Plumbed-In to Separate Tap -
Master Water Conditioning Reverse Osmosis Drinking Water System Puro-35T Plumbed-In to Separate Tap -
Microline Reverse Osmosis System TFC-335 Plumbed-In to Separate Tap $239
Microline Reverse Osmosis System TFC-435 Plumbed-In to Separate Tap $269
Multipure AquaRO Reverse Osmosis System Plumbed-In to Separate Tap $605
North Star Water Reverse Osmosis System NSRO42C4 Plumbed-In to Separate Tap $654.01
Premier by Watts WP5-50 Reverse Osmosis System Plumbed-In to Separate Tap $249.95
Premier by Watts WP5-50 Reverse Osmosis System Plumbed-In to Separate Tap $249.95
Puronics Micromax 7000 Filtration System Plumbed-In -
Puronics Micromax 7000 Filtration System Plumbed-In -
Rayne RaynePure Plus Reverse Osmosis System Plumbed-In to Separate Tap -
The LeverEdge Westinghouse Drinking Water System A-450 Plumbed-In to Separate Tap -
The LeverEdge Westinghouse Drinking Water System D-550 Plumbed-In to Separate Tap -
The LeverEdge Westinghouse Drinking Water System P-550 Plumbed-In to Separate Tap -
The LeverEdge Westinghouse Drinking Water System R-450 Plumbed-In to Separate Tap -
Water-Right Eclipse Reverse Osmosis Drinking Water System WRO-35 Plumbed-In to Separate Tap -
Watts 4-Stage Reverse Osmosis System PWRO4 Plumbed-In to Separate Tap $209
Watts 4-Stage Reverse Osmosis System PWRO4 Plumbed-In to Separate Tap $209
Watts ZRO-4 Zero Waste Reverse Osmosis Water Filtration System PWRO4ZRO Plumbed-In to Separate Tap $465
Watts ZRO-4 Zero Waste Reverse Osmosis Water Filtration System PWRO4ZRO Plumbed-In to Separate Tap $465
Whirlpool UltraEase Reverse Osmosis Filtration System WHAROS5 Plumbed-In to Separate Tap $131
Whirlpool UltraEase Reverse Osmosis System WHAPSRO Plumbed-In to Separate Tap $447
Whirlpool UltraEase Water Purifier Filtration System WHER25 Plumbed-In to Separate Tap $197