Jeff Frontz (coordinator of the website for smart spraying for West Nile mosquitoes) writes:

A  decision was handed down a few days ago from the US 6th Circuit Court of Appeals (Ohio is in the 6th Circuit).  The gist is that if you’re going to apply pesticides near a waterway, a Federal NPDES permit is needed.

 

This article has info about it in layperson’s terms:

http://enviro.blr.com/news.aspx?id=99129