Toxic PFAS found in U.S. drinking water 2023, by location

Toxic fluorinated chemicals (PFAS) found in United States tap water as of June 2023, by select city and county

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Release date

July 2023


United States

Survey time period

May and June 2023

Supplementary notes

*Samples from multiple zip codes were tested in Los Angeles, Brooklyn, and Baltimore.
Sample collection kits for a panel of 40 PFAS from SimpleLab were shipped to volunteers. Samples were collected by volunteers in May and June 2023 from an unfiltered home tap following the lab’s instructions. Samples were analyzed using EPA Method 1633.
Results represent PFAS concentrations from a single sample, and may not show what is currently coming out of a tap, but rather a snapshot of a specific site on a specific day. The test results are likely representative of the water in the area where the sample was taken but are not intended to identify specific water systems.

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