Pine Castle is one of southeast Orlando's older communities, settled back in the 1870s along what is now the corridor south of downtown, near the Conway Chain of Lakes. Today it is served largely by municipal water, so most homes here are not on a private well.
Wells are found on older and lakefront lots that kept a private well, and on homes that run a separate irrigation well to keep a lawn green. Those wells draw from the Floridan Aquifer, commonly 100 to 400 feet down, through Central Florida limestone that leaves hardness and mineral scale inside pumps, tanks, and check valves over time.