Why Does My Water Smell Like Chlorine?


Is your tap water releasing a strong scent of chlorine, leaving you wondering why and whether it’s safe to drink? While it’s common to encounter a mild chlorine odor in tap water, a strong smell can be disconcerting. This article dives into why your water might smell like chlorine and what you can do about it.

The Role of Chlorine in Water Treatment

Chlorine has been used as a disinfectant in water treatment processes for more than a century. Its primary role is to eliminate harmful bacteria and other microorganisms that may be present in the water supply. Chlorine is highly effective and helps ensure that the water reaching your tap is safe to consume.

Why Does Your Water Smell Like Chlorine?

In most cases, a chlorine smell in your tap water is a sign that your local water treatment plant is doing its job. However, a strong smell can be due to a high concentration of chlorine. This might be because:

  • Seasonal Changes: During certain periods of the year, particularly in warmer months, treatment plants increase the amount of chlorine to combat a higher rate of bacterial growth.
  • Changes in Treatment Process: Water utilities may change their disinfection process or increase chlorine levels due to maintenance or operational needs.
  • Location: If you live close to the water treatment plant, you might receive water with higher chlorine levels due to less time for the chlorine to off-gas naturally.

Is Chlorinated Water Safe to Drink?

According to health standards and regulations set by organizations like the U.S. Environmental Protection Agency, the presence of chlorine in your tap water is generally safe. However, this applies to water with a chlorine concentration of up to 4 milligrams per liter.

ParameterAcceptable Limit
Chlorine Concentration4 mg/L

That said, some people may be more sensitive to chlorine and may experience slight discomfort, such as a dry mouth or skin irritation.

How Can You Reduce the Chlorine Smell in Your Water?

While your tap water may be safe to drink, the chlorine smell can make it less appealing. Here are some easy ways to help reduce the chlorine smell:

  • Let It Stand: Pour water into an open jug and leave it uncovered. Over several hours, chlorine will evaporate from the water.
  • Use a Water Filter: A good quality water filter can effectively remove chlorine from your tap water. Consider installing a filter on your tap or using a filtered pitcher.
  • Boil Your Water: Boiling water can help dissipate the chlorine. Remember to let it cool before drinking.

Impact of Chlorine on Household Appliances

Chlorinated water isn’t just confined to your drinking glass; it also interacts with your appliances. Although chlorine helps keep water safe for consumption, high levels can cause issues over time. This includes:

  • Corrosion: High levels of chlorine can cause corrosion in metal pipes and appliances. This leads to increased wear and tear, potentially resulting in expensive replacements or repairs.
  • Discoloration: Chlorine can react with certain materials, leading to discoloration. This can affect the appearance of your appliances and surfaces over time.

Does Chlorine Affect Plant Growth?

If you’re a gardener, you might wonder about the impact of chlorinated water on your plants. While plants can tolerate small amounts of chlorine, high concentrations can be harmful. Excessive chlorine can hinder plant growth and may cause leaf burn. To avoid this, you could consider using filtered or de-chlorinated water for your plants.

Alternatives to Chlorine in Water Treatment

While chlorine remains the most popular disinfectant in water treatment, alternatives exist. These include:

  • Chloramines: A combination of chlorine and ammonia, chloramines last longer in the water system and produce fewer byproducts.
  • Ozone: Ozone is a powerful disinfectant but requires complex equipment to produce.
  • Ultraviolet (UV) Light: UV light can kill bacteria and other microorganisms, but it doesn’t provide a residual disinfectant in the water system.

The Role of Water Filters in Removing Chlorine

Water filters play a crucial role in removing chlorine from tap water. Various types of filters are available, each with different mechanisms and efficiencies:

  • Activated Carbon Filters: These filters remove chlorine through a chemical reaction that breaks down chlorine molecules.
  • Reverse Osmosis Filters: These systems push water through a semipermeable membrane, removing chlorine along with other contaminants.

However, it’s essential to maintain your filters properly to ensure their effectiveness.

What to Do if Your Water Smells Strongly of Chlorine

If your water smells strongly of chlorine, it’s advisable to take the following steps:

  1. Check with your local water supplier: They can provide information on current chlorine levels and any changes in the water treatment process.
  2. Get your water tested: If you’re still concerned, consider having a professional water test done. This will give you a precise measure of the chlorine levels.
  3. Consider a water filter: As mentioned earlier, water filters can effectively remove chlorine and improve the taste and smell of your water.

Remember, a strong chlorine smell doesn’t necessarily mean your water is unsafe, but understanding the cause and knowing your options can provide peace of mind.


While a chlorine smell in your water can be off-putting, it’s generally an indication that your water is being treated to make it safe for consumption. However, if the smell is very strong, or if you’re concerned about the chlorine levels in your water, it may be worthwhile to contact your local water supplier or consider testing your water. Remember, there are several ways you can reduce the chlorine smell, ensuring that your water is as fresh and clean as it is safe.

Frequently Asked Questions

1. Why does my water smell like chlorine?

Your water may smell like chlorine due to the disinfection process at your local water treatment plant. Chlorine is added to kill harmful bacteria and other microorganisms. However, a strong smell could be due to increased chlorine levels during certain seasons, changes in the treatment process, or your proximity to the treatment plant.

2. Is it safe to drink water that smells like chlorine?

Yes, it is generally safe to drink chlorinated water. Organizations like the U.S. Environmental Protection Agency deem it safe to consume water with a chlorine concentration of up to 4 milligrams per liter. However, individuals more sensitive to chlorine may experience discomfort, such as dry mouth or skin irritation.

3. How can I remove the chlorine smell from my water?

You can remove the chlorine smell from your water by letting it stand in an open container for a few hours, using a water filter, or boiling the water.

4. Can high levels of chlorine in water damage my household appliances?

Yes, high levels of chlorine can cause corrosion in metal pipes and appliances, leading to increased wear and tear. It can also cause discoloration of certain materials over time.

5. Does chlorinated water affect plant growth?

While plants can tolerate small amounts of chlorine, high concentrations can hinder plant growth and may cause leaf burn.

6. Are there alternatives to chlorine in water treatment?

Yes, alternatives to chlorine include chloramines, ozone, and ultraviolet (UV) light. However, these methods may require more complex equipment or processes.

7. What should I do if my water smells strongly of chlorine?

If your water smells strongly of chlorine, you can contact your local water supplier for information, get your water professionally tested, or consider using a water filter to remove the chlorine.

8. Does boiling water remove chlorine?

Yes, boiling water can help dissipate the chlorine. However, remember to let it cool before drinking.