Why Does Hair Turn Green After Swimming in a Pool?

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Why Does Hair Turn Green After Swimming in a Pool?

If you’ve ever noticed your hair — especially if it’s blonde or light-colored — turning a greenish tint after spending time in a pool, you’re not alone. This is a common problem many swimmers experience, especially during the summer months. But what causes this unexpected color change? Let’s clear the water on this issue.

It’s Not the Chlorine

Contrary to popular belief, chlorine isn’t the direct cause of green hair. While chlorine is essential for keeping pools clean and free of bacteria, the real culprit behind green hair is copper.

The Role of Copper in Pools

Copper can enter your pool water through various sources — from copper-based algaecides, corrosion of metal pipes, or even from your local water supply. When this copper dissolves in the water, it becomes a clear, invisible part of the pool.

Here’s where chlorine comes into play: when chlorine is added to the water, it oxidizes the copper. This oxidized copper can then bind to the proteins in your hair, particularly if your hair is light, porous, or chemically treated (like from coloring or bleaching). The result? A greenish hue that clings to the strands.

Who Is Most at Risk?

• Blondes and light-haired individuals: The green tint is more visible on lighter hair.

• Frequent swimmers: The more time you spend in the pool, the more exposure you have.

• Chemically treated hair: Bleached or damaged hair is more porous and absorbs minerals more easily.

How to Prevent Green Hair in the Pool

1. Wet your hair first: Rinse your hair with clean, fresh water before entering the pool. This helps fill the hair shaft and reduce absorption of pool water.

2. Use a swim cap: A simple and effective barrier.

3. Apply a leave-in conditioner: This adds a protective coating to the hair.

4. Rinse immediately after swimming: The sooner you rinse off the pool water, the less time copper has to bind to your hair.

5. Use a chelating shampoo: These are specially formulated to remove minerals and metals from the hair.

Pool Maintenance Matters

For pool owners, preventing green hair starts with proper pool maintenance. At O LIQUID, we always emphasize the importance of balanced pool water. Regularly test your pool’s copper levels and avoid excessive use of copper-based algaecides unless absolutely necessary. If copper levels are high, consider using a metal sequestrant to prevent oxidation and buildup.

In Summary

Green hair in the pool might seem like a mystery, but it all comes down to chemistry. With the right prevention techniques and proper pool care, you can enjoy crystal-clear water and healthy, vibrant hair.

Have questions about your pool water or need the right products to keep it balanced? Contact us at O LIQUID — Lebanon’s trusted name in pool care and supplies.