**Phoenix Pools: City Algae Crashing Summer Skin?**

Photograph of Franklin Everett ShawBy Franklin Everett Shaw
November 9, 2025

The shimmering heat rising off the asphalt in Phoenix isn’t just a visual effect; it’s a constant reminder of the scorching summers. And what better way to beat the heat than a refreshing dip in a public pool? But before you cannonball in, there’s a less-than-pleasant side effect of those sun-drenched pools that every Phoenix resident should be aware of: algae-related skin issues. It’s not just about cloudy water; it’s about what that water can do to your skin.

Algae in swimming pools isn’t just an aesthetic problem; it’s a potential health hazard, especially in the hot, humid climate of Maricopa County. While chlorine is meant to keep these pools clean, it’s not always enough, and algae can thrive, leading to skin irritations and infections. Let’s dive into how to identify, treat, and prevent these issues, so you can enjoy your summer swims without the itchy aftermath.

First, let’s talk about the usual suspects: the different types of algae you might encounter in a Phoenix public pool. Green algae is the most common, turning the water a murky green. Black algae, often found in cracks and crevices, appears as dark, stubborn spots. Mustard algae, also known as yellow algae, has a powdery, yellowish appearance and can be mistaken for sand or dirt.

Each type of algae can cause different skin reactions. Green algae, while generally less harmful, can still contribute to skin irritation, especially in those with sensitive skin. Black algae is more problematic, as it can harbor bacteria and lead to folliculitis, an inflammation of the hair follicles that presents as small, itchy bumps. Mustard algae can also cause irritation and, like black algae, can be a breeding ground for bacteria.

So, you’ve taken a dip, and now you’re noticing some unwelcome changes on your skin. What do you do? For mild irritation, over-the-counter remedies are your first line of defense. A simple antihistamine cream like Benadryl can help relieve itching. Hydrocortisone cream can reduce inflammation. And a gentle, fragrance-free moisturizer can help restore your skin’s natural barrier.

But what if it’s more than just a little itch? If you suspect folliculitis, look for antibacterial soaps containing benzoyl peroxide or chlorhexidine. Wash the affected area gently twice a day. A topical antibiotic ointment like Neosporin can also help prevent further infection.

Here’s a crucial step that many people miss: shower immediately after swimming. Don’t just rinse; use soap and water to remove any lingering algae or bacteria from your skin. Pay special attention to areas prone to trapping moisture, like your armpits and groin.

Now, let’s talk prevention. Before you even get in the pool, take a good look around. Is the water clear? Are the pool walls and floor free of visible algae? If something seems off, it’s best to err on the side of caution and choose a different pool.

Another key preventative measure is to create a barrier between your skin and the pool water. Applying a waterproof sunscreen with zinc oxide or titanium dioxide not only protects you from the sun but also acts as a physical barrier against algae and other irritants.

After swimming, change out of your wet swimsuit as soon as possible. Damp swimsuits can trap moisture and create a breeding ground for bacteria, increasing your risk of skin irritation. Rinse your swimsuit thoroughly with fresh water to remove any residual chlorine or algae.

One often-overlooked aspect of pool safety is the importance of maintaining your skin’s natural barrier. Dry skin is more susceptible to irritation and infection. So, after showering, apply a generous amount of moisturizer to keep your skin hydrated and healthy. Look for products containing ceramides, which help to repair and strengthen the skin’s barrier function.

But what if your skin issues persist despite your best efforts? When should you seek professional medical advice in Maricopa County? If you develop a rash that doesn’t improve with over-the-counter treatments, or if you notice signs of infection, such as pus, redness, or swelling, it’s time to see a doctor. A dermatologist can properly diagnose your condition and recommend the appropriate treatment, which may include prescription-strength creams or antibiotics.

Here’s a specific scenario: You’ve been swimming at the Papago Park pool, and a few days later, you notice small, itchy bumps on your legs and arms. You’ve tried over-the-counter antihistamine cream, but it’s not helping. This could be a sign of folliculitis, and it’s time to see a doctor. A dermatologist in Scottsdale can examine your skin and prescribe a topical antibiotic to clear up the infection.

Another common mistake is assuming that all pool chemicals are created equal. Not all pools are maintained properly, and some may have imbalances in their chemical levels. This can make the water more irritating to your skin. If you’re consistently experiencing skin problems after swimming at a particular pool, it’s worth reporting your concerns to the pool management.

Let’s consider another real-world application: You’re planning a pool party at your home in Tempe. To minimize the risk of algae-related skin issues for your guests, make sure your pool is properly chlorinated and that the pH level is balanced. Regularly brush the pool walls and floor to prevent algae from taking hold. And encourage your guests to shower before and after swimming.

Here’s a pro tip for Phoenix residents: invest in a good quality pool test kit. Regularly testing your pool water can help you identify and address any imbalances before they lead to problems. This is especially important during the hot summer months when algae growth is more prevalent.

Don’t underestimate the power of a healthy lifestyle. A strong immune system can help your body fight off infections and reduce your risk of skin problems. Eat a balanced diet, get enough sleep, and manage your stress levels.

Finally, remember that prevention is always better than cure. By taking these simple steps, you can protect your skin from algae-related issues and enjoy your summer swims in Phoenix without worry. So, go ahead, take a dip – just do it safely and smartly.

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