A catalytic-carbon tank on the main line, sized for New Orleans city water. Independent 2026 lab tests of this class of system dropped disinfection byproducts (THMs) to non-detect on municipal water, with almost no pressure loss. Treats every fixture in the house: showers, laundry, cooking, ice. Media lasts about a million gallons, so upkeep is roughly $40 a year after install.

This is our pick for SWBNO water. Mississippi River organics plus chlorine form chloroform, bromodichloromethane, and haloacetic acids in the pipes. A pitcher never sees the shower. This tank does.

Sized for 1–3 bathrooms at the standard flow, or 4+ bathrooms if you run more fixtures at once. Ships to your door. Professional install recommended on the main line after the meter.