Stewart Drilling & Geothermal in New Castle, Pennsylvania is a water well drilling and pump installation company. We provide quality well drilling and install geothermal heat pump comfort systems. We offer a variety of services including Geothermal Heating and Cooling Systems. Our owner is a fourth-generation water well-drilling contractor. His family history dates back to the early 1900s when his wifes grandfather worked alongside his father drilling water wells using a steam-powered drilling rig.