SCRANTON, Pa. (AP) — A law firm is demanding that state environmental regulators reverse their decision to allow a natural-gas driller to stop delivering replacement water to residents of a northeastern Pennsylvania town whose drinking water wells were contaminated.Cabot Oil & Gas Corp. has been delivering water to homes in the northeast village of Dimock since January of 2009. The Houston-based energy company says Dimock's water is safe to drink and won regulatory permission last month to stop the water deliveries by the end of November.Attorneys for several Dimock residents who are suing Cabot say test results show their well water is still contaminated. They accuse the state Department of Environmental Protection of colluding with the gas company. They sent a letter to the DEP on Thursday demanding that regulators order Cabot to continue paying for replacement water.