I found the link I had archived three years ago (when I mentioned researching this some years back): a Chicago Tribune article from 1994 [0]! There are lots of

I found the link I had archived three years ago (when I mentioned researching this some years back): a Chicago Tribune article from 1994 [0]! There are lots of other search results that discuss the byproducts of various algal blooms contributing to a particular stink in Lake Michigan water, some mention the active carbon filtration and another [1], the use of ozone to neutralize the responsible compounds, but only the 1994 article actually names the responsible compounds: geosmin and 2-methylisoborneol (2-MIB). (I remembered geosmin – the sometimes nice, sometimes not, smell of the earth after a rain – while writing my reply yesterday but could not recall the second compound for the life of me and I knew/know geosmin wasn’t solely responsible for the smell on its own.) [0]: https://www.chicagotribune.com/news/ct-xpm-1994-11-20-9411200261-story.html https://www.chicagotribune.com/news/ct-xpm-1994-11-20-941120... archived at https://archive.ph/qV723# https://archive.ph/qV723# [1]: https://www.chicagotribune.com/news/ct-xpm-1999-06-25-9906250245-story.html https://www.chicagotribune.com/news/ct-xpm-1999-06-25-990625... just archived at https://archive.ph/wip/ybQ9N https://archive.ph/wip/ybQ9N —- There’s also this 53-page survey of contributors to taste and smell in water supplies from the Illinois State Water Survey out of UIUC that I would love to get around to reading (or at least skimming through): https://www.isws.illinois.edu/pubdoc/C/ISWSC-127.pdf https://www.isws.illinois.edu/pubdoc/C/ISWSC-127.pdf