Metairie Terrace Water Hardness & Quality Report (2026)

Metairie Terrace is served by the Jefferson Parish Water System, which draws its supply from the Mississippi River. The Mississippi at New Orleans drains the entire central North American continent, collecting runoff from 31 states before reaching the Jefferson Parish intake. The Jefferson Parish Water System treats this river water before distributing it to residents across Jefferson Parish, including the Metairie Terrace community, providing a river-sourced supply that reflects the diverse mineral character of the broad continental watershed.

The Mississippi River at New Orleans carries a mixed carbonate and sedimentary mineral load derived from Carboniferous and Paleozoic limestone, Cretaceous chalk, and Devonian carbonate terrain across its vast drainage basin spanning 31 states. This diluted continental blend — where waters from numerous rock types and geological periods converge and mix over great distances — arrives at the Jefferson Parish intake already moderately mineralised. The result is a moderately hard supply reflecting the averaged geological character of central North America rather than any single local aquifer or formation.

At a moderately hard level, residents can expect some scale deposits on fixtures, faucets, and inside water heaters and dishwashers over time, though effects are less severe than with very hard supplies. Soap lathering is slightly reduced compared to soft water. Periodic descaling of kettles, showerheads, and faucet aerators is recommended to maintain appliance performance and efficiency. A water softener may benefit households with sensitive appliances, though it is not strictly required at moderate hardness levels.