I'm not the commenter you originally replied to. Regardless, I think you might have misinterpreted the article:
3M is a huge manufacturer in material sciences, probably best known for adhesives/tape.
They were one of the high-profile sources of PFAS (Dupont is another that springs to mind).
The affected population is global. The "11,000 U.S. public water systems alleging PFAS contamination" is part of that global impact, not something related to datacenters.
They moved away from PFAS due to the lawsuits.
The topic of this article is: One of the things 3M stopped producing was a large piece of the supply chain for the fluid cooling process in datacenters.