This is an update from a previous post that has become so huge I will have to do something, not sure what yet. Anyway, here is the info on Ohio:
Update, February 1, 2014 regarding Ohio:
After checking the Ohio gov’t website, I found nothing stating that rain water harvesting (setting up rain barrels) is against the law. It is encouraged. See see the numerous links that follow:
A rain barrel store in Westlake Ohio sells rain barrels
Ohio has lots of rules about water. Be sure to read up before you start your rainwater harvesting project. It is highly likely that its not against the law to harvest rain water in Ohio, but watch the regulations and read the definitions.