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What are PFAS?  Are they in your Drinking Water?  And How QK can Help.
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What are PFAS? Are they in your drinking water?

In August 2019, the California Division of Drinking Water (DDW) established notification levels for perfluorooctane sulfonic acid (PFOS) and perfluorooctanic acid (PFOA). The notification level for PFOS is 6.5 parts per trillion and 5.1 parts per trillion for PFOA. Collectively, PFOS and PFOA are know as PFAS (per- and polyfluoroalkyl substances). Notification levels are a non-regulatory, precautionary health-based measure for levels in drinking water that warrant notification and further monitoring and assessment.

Photo Credit: US EPA

Where did PFAS come from?

The major sources of PFAS are: fire training/fire response sites, industrial sites, landfills, and wastewater treatment plants/biosolids. In 2019, the DDW ordered 600 water systems and 250 locations near major source area to sample for PFAS. The results of this sampling are available on the DDW website.

What should I do?

Public water systems are encouraged to test their water for PFAS. There are only a handful of analytical laboratories in the State accredited to test for PFAS. QK can assist you in attaining the proper samples and work with an accredited lab to have the samples tested.

What if I have PFAS?

If testing shows PFAS above the notification levels, QK can assist you in evaluating options to mitigate the concentration on PFAS. Treatment of PFAS is dependent upon which of the PFAS chemicals are present. Treatment may involve activated carbon, anion exchange, or membranes. Treatment should be considered a last resort. QK will work with you to investigate the options of blending, sealing off zone of high PFAS in an existing well or drilling a new well.

If you have questions on how to treat PFAS in your existing water system and would like to discuss, please don’t hesitate to contact Brian Shoener, Senior Engineer at (559) 449-2400 or Brian.Shoener@qkinc.com.

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