Recommended NL for PFBS

On January 15, 2021, the Division of Drinking Water (DDW) posted an Office of Environmental Health Hazard Assessment (OEHHA) recommendation for a Notification Level (NL) for perfluorobutane sulfonic acid (PFBS).  Copy here (OEHHA PFBS NL Recommendation). OEHHA’s recommended NL is 0.5 µg/L.

Background: On February 6, 2020 DDW submitted a request to OEHHA to complete a review of available health effects information and make recommendations for notification levels for the following 7 PFAS compounds:

  • perfluorohexane sulfonic acid (PFHxS)
  • perfluorobutane sulfonic acid (PFBS)
  • perfluorohexanoic acid (PFHxA)
  • perfluoroheptanoic acid (PFHpA)
  • perfluorononanoic acid (PFNA)
  • perfluorodecanoic acid (PFDA)
  • 4,8-dioxia-3H-perflourononanoic acid (ADONA)