Piedmont Natural Gas Files for Reductions in Natural Gas Sales Rates in North Carolina and South Carolina (Piedmont Natural Gas Co Inc)

(Source: Piedmont Natural Gas Co Inc) CHARLOTTE, N.C., Dec. 16, 2014 /PRNewswire/ -- Piedmont Natural Gas (NYSE: PNY) has filed for reductions in its natural gas sales rates for customers in North Carolina and South Carolina.  Last week's filings before both the North Carolina Utilities Commission and the Public Service...