For at least fifty years, phytoplankton and algae blooms have been a regular occurrence in summer on Lake Erie.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/giant-algae-bloom-turning-great-lakes-green-scientists-warn-severe-threat-toxic-bacteria
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-mail-united-kingdom
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lakes
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/blue-green-algae
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us