Explore the critical topic of water security in this comprehensive lecture focusing on Contaminants of Emerging Concern (CECs). Delve into the complexities of Environmental Science of Our Change (ESS) and its role in addressing key water-related issues. Examine the staggering challenge posed by 147 million chemicals and their impact on compliance and regulatory frameworks. Investigate the concept of pristine catchments and the burden of proof in water management. Analyze the potential of water recycling and innovation as levers for change. Assess various risky activities affecting water quality, including the specific risks associated with recycled water. Gain insights into the environmental impacts of fire-related products on water resources.