Chlorine is a disinfectant commonly used to keep drinking water free from bacteria and viruses as it travels to our homes. However, its presence can also affect taste and smell, and may cause side effects for sensitive individuals or pets.
In this article, we explain why chlorine is added to tap water, what effects it can have and, most importantly, how to remove it effectively at home.
Why is chlorine added to tap water?
Water companies in Spain and around the world use chlorine or chloramines (a combination of chlorine and ammonia) to disinfect water and prevent disease. This practice is effective and safe, but it does have some drawbacks:
- It can alter the taste and smell of the water.
- When it reacts with organic matter, it can form by-products such as trihalomethanes (THMs), some of which are under review due to their potential health risks.
- It is harmful to certain pets (fish, reptiles, etc.) and plants.
How can you tell if your tap water contains chlorine?
A “swimming pool” taste or a strong smell can be an obvious sign. However, chlorine levels can vary depending on the area, the time of year or the condition of the pipes. If in doubt, you can use free chlorine test strips to measure its concentration.
Home methods for removing chlorine from water
1. Letting the water stand
Free chlorine evaporates over time. If you fill a jug with tap water and leave it uncovered for 24 hours, a large proportion of the chlorine will dissipate. This method is ideal for watering plants or preparing water for aquariums.
⚠️ This does not work with chloramines, as they do not evaporate easily.
2. Boiling the water
Boiling water for 10–15 minutes helps remove chlorine and is also useful as a disinfection method. However, as with letting water stand, it does not remove chloramines or other contaminants such as heavy metals or microplastics.
The most effective method: filtering water with activated carbon
Why use activated carbon filters?
Activated carbon filters, such as those used in EcoPro by Tappwater, remove up to 95–98% of chlorine and chloramines, as well as other common contaminants, including:
- Microplastics
- Lead
- Nitrates
- Unpleasant tastes and odours
This is achieved thanks to an organic activated carbon block, which works through both adsorption and catalysis, transforming hypochlorite (the active form of chlorine) into harmless chloride.
Advantages of EcoPro compared to other systems
- Easy installation with no tools required
- Biodegradable cartridges
- Does not remove beneficial minerals
- Ideal for tap water in Spain
EcoPro is certified by independent laboratories to ensure its effectiveness — a sustainable, safe and convenient solution for everyday use.
Why remove chlorine from tap water?
Although permitted chlorine levels do not pose a direct risk to human health, reducing its presence offers several benefits:
- Improves the taste of water, coffee and tea
- Reduces exposure to potentially harmful by-products
- Protects pets and plants
- Helps care for skin and hair when showering
Conclusion: filtering chlorine is a smart choice
Removing chlorine from tap water significantly improves your experience at home. If you’re looking for a practical, sustainable and effective solution, EcoPro Chrome SMR by Tappwater is your best ally.
Find out more about how to improve the quality of your home’s water on our blog and explore our range of certified filters.
