Weekly Update: Project Clean Up Newsletter - Vol. 1, Issue 33

Date: January 23, 2026

The Volatile Bridge: Tracking the Global Journey of FOSA

Welcome back to the Project Clean Up (PCU) weekly newsletter! Last week, we looked at the "chemical magnets" of DAC Sorbents and how they are scrubbing our atmosphere. This week, we focus on a compound that often hitches a ride in that same atmosphere: FOSA (Perfluorooctane Sulfonamide).

FOSA is a unique member of the PFAS family. Historically used in paper packaging and as a key ingredient in older insecticide formulations, its most dangerous characteristic is its volatility. Unlike its cousin PFOS, which stays largely in the water, FOSA can vaporize into the air. Once airborne, it can travel vast distances before falling back to earth in rain or snow, where it eventually degrades into the even more persistent PFOS. .

At Project Clean Up (PCU), we recognize that to stop "forever chemicals," we must target these volatile bridges. Our 2026 strategy involves not just cleaning the water, but intercepting these airborne precursors before they can settle and transform.