The East Coast Flood Project Report examines the impacts of the severe storms and flooding events of 2022 on waterways across New South Wales. The report details water quality monitoring results from 20 waterways in the North Coast, Mid Coast, and Hawkesbury–Nepean regions, using a multifaceted methodology combining historical data, spatial analysis, and statistical assessments. Key findings address flood-related water quality changes, catchment characteristics, and recovery processes. The report also highlights community and stakeholder engagement, including citizen science initiatives, to enhance waterway management and inform future resilience strategies. This resource supports ongoing environmental recovery and adaptive management efforts.