If you're in the Bay Area, algae is already likely affecting you: https://abc7news.com/health/toxic-algae-bloom-in-oaklands-lake-temescal-prompts-closure/21565

If you're in the Bay Area, algae is already likely affecting you: https://abc7news.com/health/toxic-algae-bloom-in-oaklands-lake-temescal-prompts-closure/2156561/ https://abc7news.com/health/toxic-algae-bloom-in-oaklands-la... http://claycord.com/2017/08/07/contra-costa-residents-experiencing-taste-and-odor-issues-with-their-water/ http://claycord.com/2017/08/07/contra-costa-residents-experi... https://coastalscience.noaa.gov/news/four-different-algal-toxins-found-san-francisco-bay-mussels/ https://coastalscience.noaa.gov/news/four-different-algal-to... https://www.sfchronicle.com/bayarea/article/toxic-algae-clearlake-oaks-lake-co-cyanobacteria-13095521.php https://www.sfchronicle.com/bayarea/article/toxic-algae-clea... These cyanobacteria levels are unusual--we don't have hundreds of years of records, but we certainly have never seen algae blooms happening regularly every year in so many bodies of water. This isn't limited to SF, e.g. Toledo has been having regular algae blooms that have shut down their municipal water for years now: https://www.bridgemi.com/michigan-environment-watch/lake-eries-algae-bloom-growing-again-after-paralyzing-toledo-water-system https://www.bridgemi.com/michigan-environment-watch/lake-eri...