Water systems must use EPA-approved analytical methods when analyzing samples to meet federal monitoring requirements or to demonstrate compliance with drinking water regulations. Approved methods are listed in the Code of Federal Regulations after publication in a final rule or as part of an expedited approval. Approved methods are developed by EPA, other government agencies, universities, consensus methods organizations, water laboratories, and instrument manufacturers. Information on analytical methods can be found here: http://water.epa.gov/scitech/drinkingwater/labcert/analyticalmethods.cfm.
Where can I find out about EPA-approved analytical methods?
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