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 (Section 14.5.6.5; Allaire et al., 2018; Baeza et al., 2018; California State Water Resources Control Board, 2021; Navarro-Espinoza et al., 2021; Water and Tribes Initiative, 2021).14.5.3.2 Projected Impacts and Risks Climate change is projected to amplify current trends in water resource impacts, potentially reducing water supply security, impairing water quality and increasing flood hazards to varying degrees across North America