See article here: Columbia Gas issue
The defective pipe was installed between November 2009 and August 2010, almost all for new construction or replacement, with the work done by Columbia and subcontractors. The 17,600 customers affected in Ohio represent a little more than 1 percent of all Columbia customers in the state. In addition, the pipe was used by Columbia's sister companies in four other states - Pennsylvania, Kentucky, Maryland and Virginia - affecting a total of 28,300 customers, including those in Ohio.
Please call your builder & gas supplier - this could affect you. I'll be calling tomorrow - since my house is serviced by Columbia and construction began January 2010.