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Get to know NSF filtration standards

Reverse Osmosis Water Filtration System

This Waterdrop RO system is tested and certified by NSF International against NSF/ANSI standard 58 & 372.
Products with NSF certification are considered to have better quality.

NSF/ANSI 58&372 Certified

94% TDS reduction

Waterdrop RO system has passed 400+ chemical lab tests.

Removes lead

Removes chlorine

Removes 94% TDS

Removes chromium

Removes turbidity

Removes carcinogens

Removes heavy metals

Removes inorganic & organic contaminants

Refrigerator Water Filter

  • Waterdrop refrigerator water filters are classified according to NSF certification.
  • Products with more NSF certification are considered to be of better quality.

Please choose the refrigerator water filter according to your needs.

All Waterdrop products can remove residual chlorine, odor and taste, common scale deposits, heavy metals, lead, chromium, arsenic, fluoride, organics, bacteria, etc.
remove chlorine
remove common scale deposits
remove heavy metals
remove lead
remove chromium
remove arsenic
remove organics
remove bacteria
remove odor and taste

Waterdrop is committed to
developing better products for you.

How to search certification information of the filter:

After selecting the model of the
filter, click “Go” to view the official
certification information.

NSF/ANSI 58
FILTRATION SYSTEMS STANDARDS

The NSF/ANSI 58 standard includes:

This standard includes requirements addressing various aspects of these systems, including: safety of materials in contact with drinking water, structural integrity, TDS (total dissolved solids) reduction performance, efficiency rating, recovery rating, contaminant reduction performance, information for the end user.

SCOPE Reverse Osmosis Drinking Water Treatment Systems
CLAIMS This standard offers various claims. Besides the required TDS (total dissolved solids) reduction, some of the most popular categories include cyst, hexavalent and trivalent chromium, arsenic, nitrate/nitrite, cadmium, lead, VOCs, barium, turbidity, fluoride, copper, and so on.
TESTING Material safety, structural integrity and contaminant reduction claims (claims vary by product).

NSF/ANSI 42, 53 AND 401
FILTRATION SYSTEMS STANDARDS

NSF/ANSI 42: DRINKING WATER TREATMENT UNITS – AESTHETIC EFFECTS

This standard establishes minimum requirements for systems designed to reduce non-health-related contaminants.

SCOPE Point-of-use and point-of-entry systems
CLAIMS Chlorine, taste and odor, chloramine, particulate, iron, manganese, zinc and total dissolved solids (TDS)
TESTING Material safety, structural integrity and specific aesthetic-related contaminant reduction claims (claims vary by product)

NSF/ANSI 53: DRINKING WATER TREATMENT UNITS – HEALTH EFFECTS

This standard establishes minimum requirements for systems designed to reduce specific health-related contaminants.

SCOPE Point-of-use and point-of-entry systems
CLAIMS This standard offers over 50 contaminant reduction claims. Some of the most popular include: lead, Cryptosporidium, VOCs and chromium.
TESTING Material safety, structural integrity and specific health-related contaminant reduction claims (claims vary by product)

NSF/ANSI 401: EMERGING COMPOUNDS/INCIDENTAL CONTAMINANTS

This standard addresses the ability of a water treatment device to remove up to 15 individual contaminants which have been identified in published studies as occurring in drinking water. The contaminants covered in NSF/ANSI 401 have been detected in drinking water supplies at trace levels and can affect some consumers’ perception of drinking water quality.

SCOPE Point-of-use and point-of-entry systems
CLAIMS This standard offers up to 15 specific contaminant reduction claims. Some of the most popular categories include prescription drugs, over-the-counter medications, herbicides, pesticides and chemical compounds.
TESTING Material safety, structural integrity and specific emerging compounds/incidental contaminants outlined in the standard.

NSF/ANSI 372 FILTRATION SYSTEMS STANDARDS

The NSF/ANSI 372 standard includes:

A maximum weighted lead content requirement of 0.25 percent (0.2 percent for solders and fluxes)
A formula for calculating the weighted average lead content of each product prior to testing
Specific procedures for testing products for lead content