California NL for PFBS

On March 5, 2021, the Division of Drinking Water (DDW) issued the final Notification Level (NL) and Response Level (RL) for perfluorobutane sulfonic acid (PFBS).

The final NL is 0.0005 mg/L = 500 ng/L

The final RL is 0.005 mg/L = 5,000 ng/L

Enclosed ( pfbs_nl_issuance_03052021_FINAL_signed) is DDW’s notice of the final NL and RL.