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Drinking Water MCLs for PFAS Chemicals — Washington

RegSenseState InfoWater AnalysisToxic Water PollutantsWater ProgramsWater ReportingMaximum Contaminant LevelsBest ResultsEnvironmentalWashingtonWater MonitoringWater ProgramsEnglishFocus AreaCWA Compliance

The state of Washington follows the federal Maximum Contaminant Levels (MCLs). 

  • PFOA: 4 parts per trillion (ppt) 
  • PFOS: 4 ppt 

Washington has state-specific interim requirements for state action levels (SALs).

  • PFOA: 10 ppt 
  • PFOS: 15 ppt 

If SALs are exceeded, the system must take follow-up actions, including notifying its customers.  Note that the State Board of Health began the process to adopt the federal rules and maintain the state’s current SALs in the interim.

Citations

['Water Programs']
['Water Analysis', 'Water Monitoring', 'Maximum Contaminant Levels', 'Water Programs', 'Water Reporting', 'Toxic Water Pollutants']
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