Ohio River Valley Water Sanitation Commission

Sarah Ramsey

Enforcement of new mercury standards for industrial and wastewater treatment plants along the Ohio River may be delayed and that has environmental groups concerned.

Documents show there are dozens of companies and municipalities with mercury monitoring requirements that dump into the Ohio River.

Mercury levels based on Great Lakes

Jeanne Ison / ORSANCO

HollNearly a quarter century after it began, the massive cleanup effort along the banks of the Ohio River and its tributaries still draws tens of thousands of volunteers.  They'll be combing more than 3,000 miles of shoreline, picking up trash and debris for River Sweep on June 15. 

Jeanne Ison with the Ohio River Valley Water Sanitation Commission, the sponsoring organization for River Sweep, said the event has been very effective since its inception.