California's textile PFAS law took effect on January 1, 2026, and the number at its centre — 100 ppm total organic fluorine — is where a lot of confusion lives. Here's what it means, with the arithmetic.
Two ways to be "regulated PFAS"
Under the statute, a textile contains regulated PFAS if either: (1) PFAS were intentionally added, or (2) total organic fluorine is measured at 100 ppm or above — dropping to 50 ppm on January 1, 2027. The second route is the one that catches brands off guard, because it doesn't care about intent.
What 100 ppm looks like
Parts per million is milligrams per kilogram. So 100 ppm means 100 mg of organic fluorine per kilogram of fabric — a very small amount. It's low enough that PFAS drifting in from a contaminated production line, a shared coating bath, or recycled fibre can push a product over the line even when nobody chose to add a "forever chemical." That's the point: the threshold is a backstop against "we didn't mean to."
The limit doesn't ask what you intended. It asks what the lab measured.
Maine and Vermont took broader "intentionally added" approaches on the same date; Connecticut focused on labelling severe-wet outdoor gear. The through-line: a brand selling nationally now has to build to the strictest number on the map.
Sources
- Buchalter, "The 2026 PFAS Surge" (California thresholds), 2026.
- Manufacturing Dive, "State PFAS laws and regulations taking effect in 2026."