Water on more sides than most towns deal with. Jupiter sits where the Loxahatchee River meets the Atlantic, and it connects south through the Indian River Lagoon to the Jupiter Inlet, so a great many properties here face brackish water at the back of the lot as well as salt air over the roof.
Copper is what suffers most. In this setting it corrodes from both directions at once: salt working inward from the surface, mineral content working outward from inside the pipe. Even a fairly young run can still develop a pinhole, and that pinhole is rarely an isolated event; it’s a preview of what the rest of the line is about to do.
The town also supplies its own water rather than buying it in. Thirty million gallons of daily capacity is the ceiling, and the customer base runs past 86,000, not just Jupiter, but Juno Beach too, plus the unincorporated edges of both Palm Beach and Martin Counties.