Treatment plants are often not set up to deal with the pathogens we are concerned about and in many cities the storm runoff runs into the sewer lines which results in the flushing of untreated water into the discharge areas during heavy snowmelt or rain events.That makes sense. I figured you would dump it down the drain or something, and if you did that here, it would go to the treatment plant and wouldn't be a problem.
How do you sterilize it?
It is easy to disinfect, use household bleach and let sit until the water clears and neutralize it with dechlorinator.
Ed