You can technically use table salt in a neti pot, but it’s not recommended. Table salt contains additives like iodine and anti-caking agents that can irritate the delicate lining of your nasal passages, causing burning or stinging. A better choice is any pure salt without additives: pickling salt, canning salt, or kosher salt (check the label for no added ingredients). These are inexpensive and widely available at grocery stores.
Why Table Salt Causes Problems
Table salt isn’t just sodium chloride. Most brands contain added iodine and anti-caking agents like sodium ferrocyanide or calcium silicate to keep it from clumping. The American Academy of Allergy, Asthma & Immunology specifically notes that iodide, anti-caking agents, and preservatives can be irritating to the nasal lining. While these additives are perfectly safe to eat, nasal tissue is far more sensitive than your digestive tract.
The irritation isn’t dangerous in a lasting way, but it defeats the purpose. If your saline rinse makes your nose burn, you’re less likely to use it consistently, and consistency is what makes nasal irrigation effective for allergies, sinus congestion, and post-nasal drip.
Which Salts Work Best
The simplest swap is pickling salt or canning salt, both of which are pure sodium chloride with nothing else added. Kosher salt also works well, though some brands include an anti-caking agent, so check the ingredient list. You want a label that says only “salt” or “sodium chloride.” Pre-mixed nasal saline packets sold at pharmacies are another option and take the guesswork out of measuring.
Sea salt is fine as long as it’s pure and finely ground enough to dissolve completely. Coarse crystals that don’t fully dissolve can irritate your nasal passages on their own.
Getting the Salt-to-Water Ratio Right
The concentration matters as much as the type of salt. Your goal is an isotonic solution, meaning the salt level matches your body’s own fluids (about 0.9% salt). Too little salt and the water will sting. Too much and it will burn and dry out your nasal lining.
The Cleveland Clinic recommends mixing 3 teaspoons of non-iodized salt with 1 teaspoon of baking soda as a dry base mix. Store that in a sealed container, then add 1 teaspoon of the mixture to 8 ounces of lukewarm water each time you rinse. The baking soda serves as a buffer that keeps the solution closer to your body’s natural pH, which reduces that stinging sensation some people get.
If you experience burning even with the right salt, try reducing the amount slightly. Temperature also matters. The water should feel lukewarm, not hot or cold.
Water Safety Is the Bigger Concern
The type of salt gets a lot of attention, but the water you use is actually a more serious safety issue. You should never use plain tap water in a neti pot. Tap water can contain low levels of bacteria and amoebas that are harmless to swallow but potentially dangerous when pushed directly into your nasal passages.
In 2011, two adults in Louisiana died from a rare brain infection after using tap water in neti pots for regular sinus irrigation. The culprit was Naegleria fowleri, an amoeba that enters through the nose and travels along the nerve connecting the nasal cavity to the brain. This organism is resistant to standard chlorine levels found in treated municipal water, so even filtered or treated tap water isn’t necessarily safe.
The CDC recommends using one of three types of water for sinus rinsing:
- Store-bought distilled or sterile water, which is the easiest and safest option
- Boiled tap water, brought to a rolling boil for at least 1 minute (3 minutes above 6,500 feet elevation), then cooled to lukewarm
- Water filtered through a device with a pore size of 1 micron or smaller, labeled “NSF 53” or “NSF 58”
Boiling and cooling a batch of water ahead of time and storing it in a clean sealed container makes daily rinsing more convenient.
Keeping Your Neti Pot Clean
Rinse your neti pot or squeeze bottle thoroughly after every use and let it air dry completely. Bacteria and mold can grow in moist devices, especially in the spout or cap areas. Most neti pots are dishwasher safe, and running them through a cycle periodically helps. Replace squeeze bottles every few months, since they’re harder to dry completely inside.
If you’ve been using table salt and haven’t had problems, you’re not in danger. But switching to a pure, additive-free salt will likely make the experience more comfortable and reduce any mild irritation you may have been attributing to the rinse itself. A box of pickling salt costs a few dollars and will last months of daily use.