I’ve just finished reading two important write-ups done for Chips Communities United on the use of PFAS chemicals in the tech sector, one about their presence in wastewater outflows from a semiconductor manufacturing site in Washington state (Siegel 2026b) and another about their use for cooling of data centres (Siegel 2026a). There’s a lot going on in both of these write-ups, so I want to draw out a few key points from each of them.

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