River Ridge shares Jefferson Parish's East Bank surface-water source, yet the water at two nearby houses can present differently after traveling through separate service lines and plumbing systems. A consumer-confidence report is the correct system-level reference; an address-level sample is the correct basis for sizing residential treatment.
That keeps the recommendation tied to evidence. A point-of-entry carbon system may fit a whole-home taste or disinfectant goal. Reverse osmosis may fit a drinking-water target at one faucet. A softener should follow a measured hardness result, not a generalized statement about Louisiana water.
The same precision matters after severe weather. A home filter is equipment inside the property, not a substitute for a public-system advisory. Pressure restoration, flushing, disinfection, sampling, and an official clearance remain the utility's process.