A federal jury has awarded two couples nearly $4.25 million after finding one of the largest natural gas drillers in Pennsylvania polluted their well water. The verdict Thursday comes at the end of a bitter and long-running federal lawsuit pitting homeowners in the village of Dimock against Houston-based Cabot Oil & Gas Corp. Dimock was the scene of the most highly publicized case of methane contamination to emerge from the early days of Pennsylvania's natural-gas drilling boom.