Climate trends are affecting riverine, lake and reservoir water quality . Droughts and increased evapotranspiration have impaired water quality by concentrating pollutants in diminished water volumes . Cyanobacterial blooms and pathogen exposure events are increasing in frequency, intensity and duration in North America . They are closely associated with observed changes in precipitation intensity and associated nutrient loading , elevated water temperatures and eutrophication . These events endanger human and animal health, recreational and drinking water uses and aquatic ecosystem functioning, and cause economic losses . Households and communities dependent on substandard wells, unimproved water sources or deficient water provision systems are more exposed than others to experience climate- related impairment of drinking water quality .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report