Drinking Water’s New Standard

The NSF/ANSI 401 standard was published in August 2014 and evaluates the capability of a water-filtration system to remove 15 so-called emerging contaminants from drinking water. NSF will continue to expand the list of contaminants as more research is completed. Here are the contaminants that the NSF/ANSI 401 standard covers, as of press time:

Chemical Compounds

  • BPA (Bisphenol A): Used as a plasticizer
  • Nonylphenol: Used as a precursor to commercial detergents
  • Tris (1-chloro-2-propyl) phosphate: Used as a flame retardant
  • Tris (2-chloroethyl) phosphate: Used as a flame retardant, plasticizer and viscosity regulator

Herbicides and Pesticides

  • DEET (N,N-Diethyl-meta-toluamide): A pesticide and common active ingredient in insect repellents
  • Linuron: A herbicide that’s used in the control of grasses and weeds
  • Metolachlor: A compound that’s used widely as a herbicide

Over-the-Counter Medications

  • Ibuprofen: A pain reliever and anti-inflammatory medication
  • Naproxen: A pain reliever and anti-inflammatory medication

Prescription Medications

  • Atenolol: A beta blocker
  • Carbamazepine: An anti-convulsant and mood-stabilizing medication
  • Estrone: A birth-control medication
  • Meprobamate: A compound that’s found in anti-anxiety medications
  • Phenytoin: An anti-epileptic medication
  • Trimethoprim: An antibiotic