[artsrc]

In the discussing the "acid rain scare" and Scandinavia, the situation with fish and lakes there is worthwhile understanding. I did a quick google, but my searching is probably no better than yours:

https://link.springer.com/chapter/10.1007/978-94-009-3385-9_...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3698327/

There may or may not be be a story on acidification of lakes in the USA, but I am ignorant on that.