Pennsylvania American Water on Monday announced plans to buy 18 trucks fueled by compressed natural gas under terms of a $315,000 state grant funded from the Marcellus Shale impact fee.

The new vehicles will be based in the water company's Scranton operations. Pennsylvania American last year launched a pilot with four CNG-powered pickup trucks in Punxsutawney and Coatesville. In November, it also received a $62,800 Alternative Fuel Incentive Grant from the state Department of Environmental Protection to convert 14 new light-duty trucks to CNG.

This year's grant, financed by the impact fee paid by natural gas producers, was secured through a partnership with Greater Philadelphia Clean Cities Coalition, which serves 34 counties in eastern Pennsylvania to implement alternative fuel use in transportation.