Climate change is altering both freshwater availability and quality, with consequences for waterborne illness. This paper reviews evidence from IPCC and WHO assessments, peer-reviewed studies, and outbreak investigations. It examines changes in water supply, water quality, and disease outcomes, including cholera, typhoid, cryptosporidiosis, and diarrhoea. Warming intensifies water-cycle variability, raises flood and drought risks, can accelerate pathogen growth, and may promote harmful algal blooms. Children and communities with inadequate sanitation face the greatest risks. Climate-resilient water and sanitation systems, water safety planning, and early-warning surveillance are key responses.

Sushma M V, Yashaswini M M, Impana RH, Manukrishna, Harshith Gowda A T, "Water Resources Availability and Quality, and Waterborne Diseases" International Journal of Scientific Research and Engineering Development, V9(6): Page(51-55) November - December 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.