plant in Mulberry, Florida, accidentally dumped 60 e6USgal of acidic process water into Skinned Sapling Creek, reducing the pH from about 8 to less than 4 along 36 mi of creek, resulting in the death of about 1.3 million fish.

It is often difficult or impossible to determine whether a potential toxin is the direct cause of a fish kill. For example, hundreds of thousands of fish died after an accidental spill of bourbon whiskey into the Kentucky River