Properties from Cannondale down through Silvermine sit on larger lots with established septic systems, but many homes were built in the 1950s through 1970s when design standards were different. High annual precipitation (52 inches versus the 38-inch national average) and freeze-thaw cycles put pressure on older drain fields and tank placements, creating a real need for properly sized replacement systems designed around Wilton’s soil conditions and seasonal moisture load. Customers near Route 7 and throughout the residential districts want honest site evaluations that account for what the land can actually handle and what the town health department will approve.