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PA Adopts New LOWER PFAS Limits for Drinking Water 

PA Adopts New LOWER PFAS Limits for Drinking Water  | Newtown News of Interest |

[Image: Composite from test data provided by the Newtown Artesian Water Company.]


The Environmental Quality Board (EQB) published notice in the January 14, 2023, edition of the PA Bulletin of an amendment to Title 25, Chapter 109 of the PA Code relating to safe drinking water. This amendment sets maximum contaminant level goals and maximum contaminant levels for perfluoroalkyl substances (PFAS) in drinking water.  


Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) are members of the chemical group called PFAS. These are human-made chemicals that do not occur naturally in the environment. These chemicals are often known for use in surface protection products (including cookware treatments), food packaging materials, and some foam firefighting materials.  


The new maximum contaminant levels (MCLs) for PFOA and PFOS are 14 ng/L (ppt) and 18 ng/L (ppt), respectively, considerably lower than the current 2016 EPA health advisory level of 70 ng/L (ppt). 


While EPA has begun the process of setting more stringent standards for PFOA and PFOS in drinking water, the federal rulemaking is expected to take years to complete.  

Until then, these new levels will apply to all water systems in the commonwealth. Initial compliance monitoring for community water systems serving more than 350 persons will begin January 1, 2024; initial monitoring for community water systems serving less than or equal to 350 persons will begin January 1, 2025.  


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Newtown News of Interest
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