Phoenix Pools: Chlorine Lies Hiding Summer Mites?

By Franklin Everett Shaw

May 28, 2026

Imagine diving into the cool, refreshing waters of your Phoenix pool on a scorching summer day. The sun beats down, the air shimmers, and that crystal-clear water beckons. But what if that idyllic scene hides a less-than-pleasant surprise: swimmer’s itch? It’s a real concern for Phoenix residents, and understanding how to prevent and treat it is crucial for enjoying our pools safely.

Swimmer’s itch, or cercarial dermatitis, is a skin rash caused by microscopic parasites that infect certain birds and mammals. These parasites release larvae into the water, which can then burrow into your skin, causing an itchy, bumpy rash. While it’s not dangerous and the parasites can’t survive in humans, the itch can be intensely irritating, especially in our hot, dry Arizona climate.

The desert environment of Phoenix presents unique challenges when it comes to swimmer’s itch. The intense heat can exacerbate the itching, and the dry air can lead to further skin irritation. Furthermore, the alkaline soil common in the Phoenix area can affect the pH balance of pool water, potentially creating a more favorable environment for the snails that host the parasites.

So, how can Phoenix residents protect themselves and their families from swimmer’s itch? The key lies in prevention, early detection, and effective treatment.

First, let’s talk about prevention. Maintaining proper pool chemistry is paramount. This means regularly testing and adjusting the pH, alkalinity, and chlorine levels. The Maricopa County Environmental Services Department provides guidelines for pool maintenance, and it’s essential to adhere to these standards.

Aim for a pH between 7.2 and 7.8.
Maintain a chlorine level of 1-3 parts per million (ppm).
Regularly shock your pool, especially after heavy use or rainfall.

But chlorine isn’t the only answer. In fact, some people are sensitive to chlorine, and prolonged exposure can lead to skin and respiratory irritation. Fortunately, there are chlorine alternatives that can be effective in preventing swimmer’s itch.

UV sanitization is an excellent option. UV systems use ultraviolet light to kill bacteria, viruses, and parasites, including the cercariae that cause swimmer’s itch. They’re also gentler on the skin and hair than chlorine, making them a popular choice for families with young children or those with sensitivities. Many pool supply stores in Phoenix, such as Leslie’s Pool Supplies and In The Swim, offer a variety of UV sanitization systems.

Another alternative is ozone sanitization. Ozone is a powerful oxidizer that can kill microorganisms and break down organic matter in pool water. Like UV systems, ozone generators are available at many Phoenix pool supply retailers.

Beyond pool chemistry, there are other preventative measures you can take.

Towel off immediately after swimming. Vigorous drying can help remove any larvae that may be on your skin.
Shower with soap and water as soon as possible after swimming.
Avoid swimming in areas known to have swimmer’s itch. This can be tricky, as the presence of the parasites isn’t always obvious. However, if you notice a lot of snails in the water, it’s best to avoid swimming there.

Now, let’s say you’ve taken all the necessary precautions, but you still develop swimmer’s itch. What do you do?

The first step is to recognize the symptoms. Swimmer’s itch typically appears as small, red, raised bumps on the skin. The bumps are usually very itchy, and they may appear within hours or days of swimming. In Phoenix, the intense heat can make the itching even more unbearable.

Here are some effective natural remedies for treating swimmer’s itch, particularly helpful in Arizona’s dry climate:

Apply a cold compress to the affected area. This can help reduce inflammation and itching.
Use calamine lotion or hydrocortisone cream. These over-the-counter medications can help relieve itching and inflammation. You can find these at any pharmacy in Phoenix, such as Walgreens or CVS.
Take an antihistamine. This can help reduce the allergic reaction that causes the itching.
Apply aloe vera gel. Aloe vera is known for its soothing and anti-inflammatory properties. It’s readily available at most drugstores and supermarkets in Phoenix. Look for pure aloe vera gel without added fragrances or alcohol, which can further irritate the skin.
Oatmeal bath: A colloidal oatmeal bath can provide significant relief from itching. The oatmeal helps to soothe and moisturize the skin. You can find colloidal oatmeal at local pharmacies or make your own by grinding plain oatmeal into a fine powder.

It’s important to note that swimmer’s itch is not contagious. You can’t spread it to others. However, if your symptoms are severe or don’t improve with home treatment, it’s best to see a doctor.

One common mistake people make is scratching the affected area. Scratching can break the skin and increase the risk of infection. Instead, try applying a cold compress or using an anti-itch cream.

Another pitfall is assuming that swimmer’s itch is caused by something else, such as a mosquito bite or poison ivy. This can delay treatment and prolong the discomfort. If you’ve been swimming and develop an itchy rash, swimmer’s itch is a likely culprit.

DIY testing kits are available at some pool supply stores in Phoenix, but they typically don’t test directly for the parasites that cause swimmer’s itch. Instead, they focus on testing water chemistry, which is an indirect way of assessing the risk. Maintaining proper water chemistry is crucial for preventing swimmer’s itch, so these kits can be helpful.

Finally, it’s important to be aware of local pool maintenance standards. The Maricopa County Environmental Services Department regulates public pools in Phoenix. They conduct regular inspections to ensure that pools are properly maintained and that water quality standards are met. If you have concerns about the maintenance of a public pool, you can contact the department to file a complaint.

Enjoying your pool in Phoenix doesn’t have to come with the risk of swimmer’s itch. By taking preventative measures, recognizing the symptoms, and using effective treatments, you can keep your skin healthy and enjoy the refreshing waters of your pool all summer long. Remember, a little knowledge and proactive care can go a long way in preventing this itchy nuisance.