HONOLULU — Recent tests show low levels of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in the Kulaʻimano Well A, part of the Pepeʻekeo water system in Hawaiʻi. This well provides water for the Pepeʻekeo area.
Measurements indicated Perfluorooctane Sulfonic Acid (PFOS) levels between 2.6 and 3.0 nanograms per liter (ng/L). These figures are below the EPA’s safe limit of 4.0 ng/L, suggesting no immediate health risks for residents. The Hawaii County Department of Water Supply (DWS) informed the Department of Health (DOH) about these findings on October 8, 2025, following tests on August 18 and September 23.
PFAS are chemicals that have been around since the 1940s. You might find them in everyday items, from stain-resistant fabrics to nonstick cookware. They’re also used in firefighting foam. The widespread use of these substances has raised concerns, leading to increasing scrutiny over their impact on health. According to the CDC, 18% of the U.S. population may have been exposed to PFAS through drinking water, underscoring the importance of monitoring water safety.
Experts recommend that communities stay informed about water quality and advocate for continuous testing to ensure safety. Need more details? Check out the EPA’s page on PFAS here.
This announcement aligns with Hawaii’s regulations requiring transparency about contaminants in drinking water. It’s an essential step in keeping the public informed about potential health risks in their water supply.
Remember, it’s always a good idea to stay updated on local water quality reports to ensure you’re drinking safe water.

