Most people blame “too much chlorine” for stinging eyes, that strong pool smell, and green-tinged hair. Almost every time, the real cause is the opposite — water that’s out of balance or not sanitized enough. Here’s what these everyday complaints are actually telling you about your pool. Noah’s Pool Service reads these signs every day.

That strong ‘chlorine’ smell means dirty water, not clean

A well-balanced pool barely smells at all. That heavy chlorine odor comes from chloramines — chlorine that has already bonded with sweat, sunscreen, and organic debris and is now spent. In other words, the smell is a sign the water needs more fresh chlorine (a shock), not less. If your pool smells strong, it’s overdue for a reset, not over-chlorinated.

Stinging red eyes are usually a pH problem

Comfortable water is close to the pH of your tears. When pH drifts too low (acidic) or too high, and when chloramines build up, your eyes sting and turn red. It’s rarely “too much chlorine” — it’s unbalanced water. Correcting pH and clearing chloramines fixes it, and it’s a good reminder that balance, not just sanitizer, is what makes water comfortable.

Green hair comes from copper, not chlorine

Blonde and light hair can pick up a green tint after swimming, and the culprit is usually copper in the water — from metal in fill water, old plumbing, or copper-based algaecides — that oxidizes and binds to hair. Chlorine helps the reaction along, but chlorine isn’t the cause. Keeping metals sequestered and water balanced prevents it (rinsing off right after swimming helps too).

Itchy or dry skin after swimming

Dry, itchy skin usually points to high pH or high chloramines pulling moisture and irritating the skin. Balanced water feels noticeably better to swim in — another sign that comfort and clean water go hand in hand.

The common thread: balanced water

Every one of these complaints traces back to the same thing — water chemistry that’s drifted out of range or sanitizer that’s fallen behind. That’s exactly what consistent weekly testing and balancing prevents. If your pool smells strong or your family’s eyes sting after every swim, that’s your water asking for attention. See what weekly service includes, or read our guide on keeping water clear all season.

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Frequently asked questions

Why does my pool smell strongly of chlorine?

Counterintuitively, a strong chlorine smell means the water is dirty, not over-chlorinated. The odor comes from chloramines — spent chlorine bonded to sweat, sunscreen, and debris. The fix is fresh chlorine (a shock), not less.

Why do my eyes sting and turn red in the pool?

Usually unbalanced pH and a buildup of chloramines, not ‘too much chlorine.’ Comfortable water sits near the pH of your tears; when it drifts, eyes sting. Correcting pH and clearing chloramines resolves it.

Why does my hair turn green after swimming?

Green hair comes from copper in the water — from fill water, old plumbing, or copper-based algaecides — oxidizing and binding to hair, especially light-colored hair. It’s not chlorine. Keep metals sequestered, balance the water, and rinse off right after swimming.

Is a strong chlorine smell a sign of too much chlorine?

No — it’s the opposite. A strong smell indicates chloramines from spent chlorine and a heavy organic load, meaning the pool needs more fresh chlorine, not less. A properly sanitized, balanced pool has almost no odor.

Why does my skin feel dry or itchy after swimming?

Typically high pH or elevated chloramines irritating and drying the skin. Balanced water feels noticeably more comfortable — consistent testing and balancing is the fix.