When buying any water filter system insist, look specifically for one or more of the following approvals:

• National Sanitation Foundation standards 42 and 53
  
  
• Environmental Protection Agency (EPA)
  
  
• Water Quality Association
  
  
• Water Reasearch Council (UK)
  
  
• British 5750 Quality Standard
  
  
• England's Water Research council (WRc) Performance Standards
  
  
• Californa Department of Health
  

or one of over 50 other Independent Laboratories worldwide