Matthews sits right on the Union/Mecklenburg county line and has a wide mix of housing stock, from established older neighborhoods to newer builds closer to the Charlotte commute corridor.
Because Matthews straddles two counties, water source varies block by block — some homes are on Charlotte Water, others on Union County lines, and a smaller number are still on private wells in the older, larger-lot pockets of town.
With that much variation, your quote is based on your actual home — your water source, household size, and what you're seeing at the tap — not a generic assumption based on your zip code.
Indian Trail has been one of the fastest-growing towns in Union County for years, with subdivision after subdivision of newer construction built out along Highway 74.
Monroe is the Union County seat, with a mix of older homes near downtown on the city's municipal water system and newer construction further out toward the edges of town.