**Phoenix Algae: Are "Clean" Pools Breeding Estrogen?**

By Franklin Everett Shaw

August 4, 2025

Imagine diving into your backyard pool on a sweltering Phoenix afternoon, seeking respite from the desert heat. But what if that seemingly pristine water held a hidden danger, a cocktail of chemicals disrupting your family’s hormonal balance? It’s a chilling thought, especially considering the potential for endocrine-disrupting chemicals (EDCs) to leach into our water sources, even from the very products we use to keep our pools “clean.”

The sun beats down relentlessly on Phoenix, Arizona. Many residents rely on their backyard pools for relief. But are these pools as safe as we think, especially for those in Scottsdale using well water? Let’s dive into the potential presence of endocrine-disrupting chemicals (EDCs) in Phoenix-area pools and what you can do about it.

EDCs are substances that interfere with the body’s endocrine system, mimicking or blocking hormones and potentially leading to developmental, reproductive, neurological, and immune effects. They’re found in a surprising number of everyday products, from plastics and pesticides to personal care items and, yes, even some pool chemicals.

The problem is compounded for Scottsdale residents using well water. Unlike municipal water sources, well water isn’t always subject to the same rigorous testing and treatment processes. This means that EDCs present in the surrounding environment can more easily leach into the water supply and, subsequently, into your pool.

Traditional pool maintenance often relies on chlorine-based products. While effective at sanitizing, chlorine can react with organic matter in the water to form disinfection byproducts (DBPs), some of which are known EDCs. Furthermore, certain algaecides and clarifiers may contain chemicals with endocrine-disrupting properties.

So, how do you know if your pool water is contaminated? The first step is testing.

Here’s a step-by-step guide for Scottsdale residents using well water:

1. Choose the Right Test: Don’t rely on standard pool test kits. You need a specialized test that specifically screens for EDCs. Look for kits that test for common EDCs like phthalates, bisphenol A (BPA), and certain pesticides. A good starting point is to search online for “endocrine disruptor water test kit.”
2. Collect Your Sample: Follow the instructions provided with your test kit meticulously. Typically, this involves collecting a water sample from your pool in a sterile container. Be sure to collect the sample away from the skimmer and any areas where chemicals are directly added.
3. Send It to a Lab: Most EDC test kits require you to send the sample to a certified laboratory for analysis. The lab will provide you with a detailed report of the EDC levels in your water.
4. Interpreting the Results: This is where things get tricky. There are no universally accepted “safe” levels for EDCs in pool water. However, the report will likely provide a comparison to established guidelines or recommendations for drinking water. Use this as a benchmark, keeping in mind that pool water is often ingested accidentally.
5. Consider a Second Opinion: If you’re concerned about the results, consult with a water quality expert or a toxicologist. They can help you interpret the data and assess the potential health risks.

Now, let’s talk about alternative pool cleaning methods. California, with its stringent environmental regulations, has been a pioneer in adopting less estrogenic pool maintenance practices.

Here are some options inspired by California’s approach:

• Saltwater Systems: Saltwater pools use a salt chlorine generator to produce chlorine from salt. While they still use chlorine, they often result in lower levels of chloramines, a type of DBP.
• Ozone Generators: Ozone is a powerful oxidizer that can kill bacteria and algae without producing harmful DBPs.
• UV Sanitizers: UV light can effectively disinfect pool water by destroying the DNA of microorganisms.
• Mineral Systems: These systems use minerals like silver and copper to inhibit algae growth and reduce the need for chlorine.
• Enzyme-Based Cleaners: Enzymes can break down organic matter in the water, reducing the formation of DBPs and improving water clarity.

It’s crucial to remember that no single method is a silver bullet. A combination of these approaches, along with regular water testing and proper pool maintenance, is often the most effective way to minimize EDC exposure.

Phoenix news outlets have reported on concerns about water quality and potential health risks associated with chemical exposure. While these reports may not specifically focus on EDCs in pools, they highlight the broader issue of environmental contamination and the importance of being proactive about protecting your health.

For example, recent articles have discussed the presence of PFAS (per- and polyfluoroalkyl substances) in Arizona’s water supply. While PFAS are not the same as EDCs, they share similar concerns about their potential health effects and persistence in the environment.

Furthermore, studies have linked exposure to certain EDCs to increased rates of breast cancer, prostate cancer, and reproductive disorders. While these studies may not be specific to Phoenix, they underscore the potential health risks associated with EDC exposure and the importance of taking steps to minimize your risk.

Here are some actionable steps you can take to mitigate potential risks for yourself and your family:

• Filter Your Well Water: Install a high-quality water filter in your home to remove EDCs from your drinking water. Look for filters certified to remove specific EDCs, such as phthalates and BPA.
• Shower After Swimming: Showering after swimming can help remove any residual chemicals from your skin.
• Choose Safer Pool Products: Opt for pool chemicals that are labeled as “EDC-free” or “phthalate-free.”
• Reduce Plastic Use: Minimize your use of plastic products, especially those that come into contact with food and water.
• Eat Organic: Choose organic fruits and vegetables to reduce your exposure to pesticides.
• Support Local Advocacy: Advocate for stricter regulations on the use of EDCs in consumer products and industrial processes.

The challenge lies in the fact that EDCs are often invisible and odorless. You can’t simply look at your pool water and know if it’s contaminated. This is why regular testing and a proactive approach to pool maintenance are so important.

One common mistake developers make is assuming that all pool chemicals are created equal. They may not realize that certain products contain EDCs or that chlorine can react with organic matter to form harmful DBPs.

Another pitfall is neglecting to properly maintain the pool. Poor water circulation, inadequate filtration, and infrequent cleaning can all contribute to the buildup of EDCs and other contaminants.

To overcome these challenges, developers need to educate themselves about the potential risks associated with pool chemicals and adopt best practices for pool maintenance. This includes choosing safer products, implementing alternative cleaning methods, and regularly testing the water for EDCs.

In conclusion, while a refreshing dip in your Phoenix pool offers a welcome escape from the heat, it’s crucial to be aware of the potential presence of EDCs. By testing your water, exploring alternative cleaning methods, and taking proactive steps to protect your health, you can enjoy your pool with greater peace of mind. Don’t let the pursuit of a “clean” pool compromise your family’s well-being.