Burning eyes and a strong “chlorine smell” are often seen as signs of clean, well-treated water. In reality, they usually indicate the opposite. These symptoms are clear warnings that your pool or spa water is out of balance — and that something needs attention.

Why Chlorine Smell Isn’t a Good Sign

The smell commonly associated with chlorine doesn’t come from chlorine itself. It comes from chloramines, compounds formed when chlorine reacts with organic contaminants such as sweat, cosmetics, body oils, or urine.

Chloramines:

• Produce the characteristic “pool smell”
• Reduce the disinfecting power of chlorine
• Cause eye, skin, and respiratory irritation

If you smell chlorine, it often means there isn’t enough free, effective chlorine in the water.

Why Eyes Burn in Pools and Spas

Burning or irritated eyes are another sign of chemical imbalance. The most common causes include:

• High levels of chloramines
• pH that is too high or too low
• Poor water circulation and filtration

Eyes are particularly sensitive to these imbalances, making discomfort one of the first symptoms swimmers notice.

The Role of pH in Comfort

Even when chlorine levels are correct, improper pH can cause irritation:

• pH below 7.2 makes water aggressive and irritating
• pH above 7.6 reduces chlorine efficiency, allowing chloramines to build up

Maintaining pH between 7.2 and 7.6 is essential for both comfort and effective disinfection.

How to Fix the Problem

1. Test free and combined chlorine levels
2. Adjust pH to the recommended range
3. Perform a chlorine shock treatment to break down chloramines
4. Improve filtration and circulation
5. Avoid overloading the pool or spa with too many bathers at once

Regular maintenance prevents irritation before it starts.

How EcO Helps Keep Water Comfortable

The EcO connected water analyzer monitors key parameters continuously, including chlorine, pH, ORP, and temperature.
The iopool app alerts you when values drift out of range and provides clear instructions on how to restore balance — before discomfort appears.

Conclusion

Burning eyes and that familiar “chlorine smell” are not signs of clean water — they’re warning signals. By understanding what causes them and maintaining proper water balance, you can keep your pool or spa comfortable, healthy, and enjoyable. With the help of EcO, staying ahead of these issues becomes simple and stress-free.