Pitcher, fridge filter, or reverse osmosis?
Updated August 2026
Most households own at least one of these already. Each one is a real filter doing a real job, and each one has a line where its job ends. Knowing where that line sits for your water saves you from buying the same fix three times.
The filter pitcher
A pitcher pulls water through a small cartridge of granular carbon by gravity. Carbon grabs chlorine and some off-tastes on contact, so on a Northshore system running free chlorine, a fresh cartridge genuinely improves the first glass.
The limits come from size and time. Water spends a few seconds in a cartridge the size of a coffee cup, and that is enough contact for chlorine and not much else. Chloramine, the disinfectant most of the New Orleans area uses, mostly rides through. Dissolved solids, sodium, and hardness pass untouched, because carbon does not hold minerals at all. Cartridges also fade quietly; the water keeps flowing long after the carbon quit, and the pitcher gives you no way to know. A household that follows the replacement schedule spends real money every year on cartridges for two or three pints of cold water at a time.
The fridge filter
The filter inside the refrigerator door is the same idea with better plumbing: a carbon cartridge, pressurized this time, feeding the water and ice dispensers. Certified models carry NSF claims for chlorine taste, and some carry a lead claim as well. On free-chlorine water it earns its keep.
Its limits are the pitcher's limits. Contact time is short, chloramine gets through in the towns that use it, and minerals pass straight through. The cartridge is supposed to change every six months, costs a surprising amount at the parts counter, and in most houses it quietly serves years past its rating. It also only covers what the fridge dispenses, so the pot you fill at the sink and the coffee maker's reservoir never see it.
Under-sink reverse osmosis
Reverse osmosis is a different mechanism, and that is the point. Instead of asking carbon to grab things on the way past, RO pushes water through a membrane whose openings are smaller than dissolved solids, metals, and salts. It is the only option on this page that reduces lead, sodium, nitrates, and the dissolved-solids load itself, and certified systems document exactly which claims they carry. Carbon prefilters are built in, so the disinfectant goes too, chloramine included. We wrote up the full picture in what reverse osmosis actually removes.
Its limits are scope and plumbing. It serves the one tap it is installed at, it needs a cartridge change once a year, and it sends some water to the drain as it works. It costs more than a pitcher because it is doing a categorically different job.
Which one fits which problem
- A renter on free-chlorine water who wants better-tasting cold water is well served by a pitcher.
- A fridge filter covers the dispenser and ice on chlorine systems, and its cartridge deserves to be changed on schedule.
- A household in a chloramine town that wants the pool taste gone at the kitchen tap is past what small carbon can do, and RO with proper prefilters is the tool that actually gets there.
- A house with a published lead result, sodium concerns, or white film on glasses has a dissolved-solids problem, and only the membrane addresses it.
- When the complaint covers every shower and faucet in the house, no drinking-water filter is the answer, and the conversation moves to whole-home equipment.
Start with what your water actually carries
The right choice depends on your system's numbers, and every system around here publishes them. Covington's city system, the parish systems around it, New Orleans, Metairie, and the Westbank each run different disinfectants at different levels, and we keep plain-language reports for neighborhoods across both shores. Read yours before buying anything, including from us.