In 2000 the small township of Walkerton Ontario witnessed the largest outbreak of E.Coli infections in Canada's history. The water utility claimed the town water was safe, but it wasn't and many people paid with their lives.
With John Chidgey.

Links of potential interest:

Support Causality on Patreon

Episode Gold Producer:

'r'.
Episode Silver Producers:

Carsten Hansen, John Whitlow, Joseph Antonio and Kevin Koch.

With thanks to

Jon Paul

for the topic suggestion.