Between 2000 and 2010, ~10% of the global population faced adverse water quality issues . Adverse drinking water quality has been associated with extreme weather events in countries located in Asia, Africa and South and North America  . Dilution factors in 635 of 1049 US streams fell extremely low during drought conditions. Additionally, the safety threshold for endocrine-disrupting compound concentration exceeded in roughly a third of streams studied . Natural acid rock drainage, which can potentially release toxic substances, has experienced intensification in an alpine catchment of the Central Pyrenees due to climate change and severe droughts in the last decade. River length affected by natural acid drainage increased from 5 km in 1945 to 35 km in 2018 . Threefold increases in contaminants and fivefold increases in nutrients have been observed in water sources after wildfires . Due to permafrost thawing, the concentration of major ions, especially SO42- in two high Arctic lakes, has rapidly increased up to 500% and 340% during 2006-2016 and 2008-2016, respectively . The exports of dissolved organic carbon , particulate organic carbon and mercury in six Arctic rivers were reported to increase with significant deepening of active layers caused by climate warming during 1999-2015 . Sustained warming in Lake Tanganyika in Zambia during the last ~150 years reduced lake mixing, which has depressed algal production, shrunk the oxygenated benthic habitat by 38% and further reduced fish and mollusc yield . From 1994 to 2010, coastal benthos at King George Island in Antarctica have observed a remarkable shift primarily linked to ongoing climate warming and the increased sediment runoff triggered by glacier retreats . The recovery time of macroinvertebrates from floods was found longer in cases of pre- existing pollution problems .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report