Helpless,
I don't know if these links can help but maybe try giving them a call. The DNR usaully takes water problems very seriously . usually so much so that it makes it hard for the little guys to even have a pond. I would think that someone piosoning a pond would be right up their ally.

http://offices.sc.egov.usda.gov/locator/...as&stateCode=05

http://www.agfc.com/

Good luck!
Let us know how you make out.