Chlorine in Swimming Pools: What It Does to Your Body and How to Protect Yourself

Photo of author

Chlorine is commonly used as a disinfectant in swimming pools to kill bacteria and prevent the spread of waterborne diseases. While chlorine is effective in maintaining the cleanliness of pools, it can have various effects on the human body and overall health. In this article, we will explore the potential impacts of chlorine exposure and discuss ways to mitigate its effects.

Understanding the Impact of Chlorine Exposure in Swimming

Swimming is a popular recreational activity that offers numerous health benefits. However, prolonged exposure to chlorine in swimming pools can have both short-term and long-term effects on the body. Let’s delve into the potential impacts of chlorine exposure:

  1. Irritation to the Skin and Eyes: Chlorine can cause skin dryness, itchiness, and redness, especially for individuals with sensitive skin. It can also lead to eye irritation, redness, and blurry vision.
  2. Respiratory Issues: Breathing in chlorine fumes or chlorinated water vapor can irritate the respiratory system, triggering symptoms such as coughing, wheezing, and shortness of breath. This can be particularly problematic for individuals with pre-existing respiratory conditions like asthma.
  3. Disruption of the Microbiome: Chlorine is known to kill not only harmful bacteria but also beneficial bacteria present on the skin and in the gut. This can disrupt the delicate balance of the body’s microbiome, which plays a crucial role in overall health.
  4. Dryness and Damage to Hair: Chlorine can strip the natural oils from the hair, leaving it dry, brittle, and prone to breakage. It can also cause discoloration and a greenish tint in light-colored hair.

How Chlorine Affects Your Skin, Eyes, and Respiratory System

Chlorine can have specific effects on different parts of the body, including the skin, eyes, and respiratory system. Let’s take a closer look at these impacts:

  1. Skin: Chlorine can cause dryness, itching, and redness of the skin. It can also exacerbate existing skin conditions such as eczema and dermatitis. To minimize these effects, it is recommended to shower before and after swimming to remove residual chlorine from the skin and apply moisturizers to keep the skin hydrated.
  2. Eyes: Chlorine is known to irritate the eyes, leading to redness, itching, and a burning sensation. Wearing swim goggles can provide a protective barrier and reduce direct contact between chlorine and the eyes. Additionally, using lubricating eye drops after swimming can alleviate any discomfort.
  3. Respiratory System: Inhalation of chlorine fumes or chlorinated water vapor can irritate the respiratory system, causing symptoms like coughing, wheezing, and shortness of breath. Individuals with pre-existing respiratory conditions such as asthma should take extra precautions when swimming in chlorinated pools, such as using a nose clip and ensuring proper ventilation in indoor pool areas.

The Potential Risks of Chlorine and Swimming Pool Chemicals

While chlorine is an effective disinfectant, there are potential risks associated with its use in swimming pools. These risks include:

  1. Formation of Disinfection Byproducts (DBPs): When chlorine reacts with organic matter, such as sweat, urine, and skin cells, it can form disinfection byproducts (DBPs). Some DBPs, such as chloramines and trihalomethanes, have been linked to adverse health effects, including respiratory issues and even certain types of cancer.
  2. Chemical Sensitivities: Some individuals may develop sensitivities or allergies to chlorine or other pool chemicals. This can manifest as skin rashes, respiratory symptoms, or other allergic reactions. It is essential to be aware of any adverse reactions and seek medical advice if necessary.
  3. Combined Chlorine: Combined chlorine refers to the chlorine that has already reacted with organic matter and is no longer effective in killing bacteria and other microorganisms. High levels of combined chlorine can indicate inadequate pool maintenance and may increase the risk of waterborne illnesses.

Exploring the Health Concerns Associated with Chlorine in Pools

The use of chlorine in swimming pools raises several health concerns that require attention. Let’s delve into these concerns:

  1. Asthma and Respiratory Conditions: Chlorine exposure can trigger asthma symptoms and worsen respiratory conditions. This is particularly significant for competitive swimmers or individuals who spend extended periods in chlorinated pools. Proper ventilation and regular cleaning of pool filters can help reduce chlorine fumes and maintain better air quality.
  2. Swimmer’s Itch: Although chlorine effectively kills most bacteria, it may not eliminate all parasites. Swimmer’s itch, also known as cercarial dermatitis, is a skin rash caused by an allergic reaction to certain parasites found in freshwater bodies treated with chlorine. Avoiding swimming in areas with stagnant water or using protective creams can reduce the risk of developing swimmer’s itch.
  3. Cancer Risks: While the risk of developing cancer from swimming in chlorinated pools is generally low, long-term exposure to certain disinfection byproducts (DBPs) formed by chlorine can increase the risk. It is essential to maintain proper pool maintenance and water quality to minimize DBP formation.


Q1: Can chlorine cause allergic reactions?

A1: Yes, some individuals may develop sensitivities or allergies to chlorine, which can manifest as skin rashes, respiratory symptoms, or other allergic reactions. It is essential to seek medical advice if you experience any adverse reactions.

Q2: How can I protect my skin from chlorine?

A2: Before swimming, you can apply a layer of petroleum jelly or a waterproof sunscreen to create a barrier between your skin and the chlorine. After swimming, rinse off with fresh water and apply a moisturizer to keep your skin hydrated.

Q3: What are the alternatives to chlorine for pool disinfection?

A3: There are alternative pool disinfection methods available, such as saltwater chlorination systems or UV disinfection. These methods can reduce the reliance on chlorine and potentially minimize its associated health effects.

Q4: Is it safe to swim in chlorinated pools during pregnancy?

A4: Generally, swimming in chlorinated pools during pregnancy is considered safe. However, pregnant women should consult with their healthcare provider for personalized advice and take necessary precautions to minimize exposure to chlorine and other pool chemicals.

Q5: How can I reduce chlorine fumes in indoor pools?

A5: Proper ventilation is crucial in indoor pools to reduce chlorine fumes. Ensuring adequate airflow, using exhaust fans, and maintaining regular maintenance of the pool’s air handling systems can help minimize the concentration of chlorine fumes.

Q6: Can chlorine cause hair damage?

A6: Chlorine can strip the natural oils from the hair, leading to dryness, brittleness, and discoloration. To protect your hair, wet it with clean water before swimming and wear a swim cap to reduce direct contact with chlorinated water. After swimming, rinse your hair thoroughly and use a clarifying shampoo to remove any residual chlorine.

Q7: Are there any long-term health effects of swimming in chlorinated pools?

A7: While the long-term health effects of swimming in chlorinated pools are still being studied, prolonged exposure to certain disinfection byproducts (DBPs) formed by chlorine can potentially increase the risk of certain health conditions. Maintaining proper pool maintenance, water quality, and practicing good hygiene can help minimize these risks.