Ocean Water or Chlorine? An ENT Specialist Explains

As summer arrives on Long Island, many families spend more time in pools and at the beach. While swimming is a fantastic full-body workout and a great way to cool off, it can also provide natural sinus relief for many. However, some swimmers notice mild pressure, congestion, or a runny nose after getting out of the water.

One of the most common questions patients ask is whether chlorine pools or ocean water is worse or better for the sinuses. The answer depends on both the water environment and your individual anatomy.

Ocean Water: Nature’s Natural Nasal Rinse

Ocean water has incredible natural benefits for sinus health. In fact, the saline nasal sprays and sinus rinse kits sold in local pharmacies are simply sterilized formulations designed to mimic ocean water.

• The Benefits: Salt water naturally thins out thick mucus, clears the sinus passages, and helps wash away trapped allergens like pollen and dust. Many people find that they can breathe much more clearly immediately after a swim in the ocean.
• The Caveats: However, diving under crashing waves or swimming deep underwater can force water into the sinus cavities too quickly due to pressure. Additionally, natural elements in the ocean, like sand particles, algae, or microorganisms, can occasionally trigger mild inflammation in highly sensitive individuals.

Chlorine Pools: Clean Water with a Chemical Catch

Chlorine is essential for keeping public and backyard pools clean, hygienic, and free from waterborne bacteria that could cause infections.

• The Benefits: Swimming in a well-regulated and properly ventilated pool keeps the nasal passages humidified and helps improve respiratory coordination.
• The Caveats: Discomfort usually arises when chlorine levels are exceptionally high or when swimming in poorly ventilated indoor pools where chemical vapors get trapped. Chlorine is a chemical irritant that can dry out the delicate mucosal lining inside the nose. For those with chronic allergies or sinusitis, this dryness can prompt the body to overcompensate by producing extra mucus leading to that post-swimming congestion.

The Anatomy Factor: If you have an underlying structural issue like a deviated septum, enlarged turbinates, or nasal polyps, your sinuses already have a hard time draining. In these cases, both the physical pressure of ocean water and the drying effect of chlorine can amplify your symptoms. Sometimes, it’s not the water itself; it’s the tight spaces inside the nose.

How to Get the Best of Both Worlds

You don't have to stay out of the water to keep your sinuses happy. You can enjoy the best of Long Island's waters this summer with a few simple habits:

• Post-Swim Rinse: As soon as you get out of the pool or the ocean, gently rinse your nose with a clean, sterile saline spray. This washes away any lingering chlorine or ocean debris before they irritate.
• Use Nose Clips: If you love diving but hate the sinus pressure, a simple nose clip is an easy, effective way to keep water out of your nasal passages entirely.
• Stay Hydrated: Drinking plenty of fresh water throughout the day helps counteract the drying effects of pool chemicals from the inside out.

When to See a Local Specialist

If your post-swimming congestion, facial pressure, or sinus headaches last for several days or turn into a full-blown sinus infection, it may be time to look beyond seasonal irritation. Persistent symptoms often point to a structural ENT condition that needs professional evaluation.

Dr. Roger Horioglu is a double board-certified ENT and facial plastic surgeon practicing in Rockville Centre, New York.

Learn more: southshoreclinic.com