The podcast episodes provided cover various aspects of water treatment, including the history of water treatment practices, the need for improved water treatment systems, and the latest regulations and technologies being implemented to address water quality issues.

For example, the episode The 1854 Broad Street Cholera Outbreak (Encore) discusses how the identification of a contaminated water pump as the source of a cholera outbreak in London led to advancements in the understanding of waterborne diseases and the importance of proper water treatment. Similarly, the episode What To Know About The New EPA Rule Limiting 'Forever Chemicals' In Tap Water covers the recent EPA regulations on PFAS chemicals in drinking water and the treatment technologies required to comply with the new standards.

The episode The Taste of Water: A Conversation with Christy Spackman focuses more on the processes and techniques used to manage the taste and odor of treated drinking water, underscoring the importance of ensuring water not only meets safety standards but also has an appealing flavor.