Chlorine in Your Tap Water? 5 Ways to Remove It

That sharp pool smell in a glass of tap water is chlorine, and it is there on purpose. Utilities add it so the water arriving at your faucet is free of the bacteria and viruses that once made drinking water dangerous.

The catch is that chlorine keeps working long after it has done its job. It can leave a chemical taste in your coffee, dry out skin and hair in the shower, and react with organic matter to form byproducts you would rather not swallow.

Getting it out is simple and mostly cheap. Below are five ways to remove chlorine from water, from a free pitcher trick to a whole-house filter, plus what changes if your utility has switched to chloramine.

What Is Chlorine?

Chlorine is a chemical element that water utilities add to the public supply as a disinfectant, where it kills bacteria, viruses, and parasites before the water reaches your house. It is also used in pesticides, paints, textiles, and some medicines.

In its natural form, chlorine is a gas. Treatment plants compress it into a liquid and dose it into the supply because it is cheap, effective, and keeps working all the way through the pipes. That last part is why it became the backbone of municipal water treatment more than a century ago.

Is Chlorine Safe to Drink?

Yes, chlorinated tap water is safe to drink at the levels U.S. utilities use. The EPA caps residual chlorine in drinking water at 4 mg/L, and the CDC treats water at or below that level as unlikely to make anyone sick.

Most systems run well under that ceiling. A typical free chlorine residual measured at the tap falls between 0.5 and 3.5 mg/L, according to the CDC, which is enough to hold off regrowth in the pipes without turning your water into a pool.

Chlorinated water still gets blamed for dry skin, brittle hair, and stinging eyes after a swim, so it has picked up a bad reputation over the years.

Here is a slightly gross fact: chlorine itself usually is not what burns your eyes at the pool. That sting comes from chloramines, which form when chlorine reacts with organic matter like sweat and urine ⁽¹⁾.

As unpleasant as that sounds, it is exactly why chlorine belongs in your tap water. It binds to bacteria, viruses, and parasites and destroys them. Without it, the water supply would be an open door to diseases like cholera and typhoid.

Killing germs, though, does not make chlorine harmless to people in large amounts. It is a toxic chemical that needs careful handling ⁽²⁾.

The Dangers of Chlorine

By the time water reaches your tap, the chlorine has already done its job, and drinking or bathing in it long term carries a few potential downsides:

• Gut health issues: Chlorine is built to kill bacteria, and it cannot tell a harmful pathogen in the pipes from the friendly bacteria in your gut. Regularly drinking chlorinated water may disrupt your microbiome ⁽³⁾.
• Trihalomethanes (THMs): When chlorine reacts with organic matter in water, it forms byproducts called trihalomethanes. The EPA caps total trihalomethanes at 80 parts per billion, sets the health goal at zero, and links long-term exposure to a higher risk of bladder cancer ⁽⁴⁾.
• Potential birth defects: Some studies point to a link between chlorination byproducts and adverse reproductive outcomes. A Taiwanese study noted a possible connection between high exposure and issues like cleft palates ⁽⁵⁾.
• Food sensitivities: Early research suggests chlorine byproducts might influence how our bodies react to certain foods. More work is needed, but a study in the Annals of Allergy, Asthma, and Immunology flagged a possible correlation ⁽⁶⁾.

The Chloramine Complication

Before you pick a method, find out which disinfectant your utility uses, because chloramine changes the answer. Many systems have switched from plain chlorine to chloramine, a blend of chlorine and ammonia, because it stays stable in the pipes far longer.

That stability is the problem. Chloramine does not evaporate, heat does not break it up, and a standard activated carbon cartridge reduces chlorine much better than it reduces chloramine ⁽⁷⁾. Your annual water quality report, mailed or posted by your utility, names the disinfectant in use.

How Do You Remove Chlorine from Water?

You remove chlorine from water by filtering it through activated carbon, letting it evaporate, boiling it, neutralizing it with vitamin C or a Campden tablet, or running it past a high-output UV lamp. Which one fits depends on how much water you need at once, and whether your utility uses chlorine or chloramine.

Water Filtration

The most reliable way to strip chlorine and chloramine is filtration, and activated carbon does most of the heavy lifting.

Carbon filters work by adsorption. As water flows through, the carbon grabs the chlorine molecules and holds onto them, letting cleaner water pass. Contact time matters, so a slow-flowing carbon block clears more than a fast, high-flow filter, and an undersized cartridge on a shower head clears less than the label suggests.

For deeper cleaning, reverse osmosis systems push water through a semi-permeable membrane. They are the gold standard for home purification, taking out chlorine, fluoride, lead, and almost everything else ⁽⁸⁾. For chloramine specifically, it is the carbon pre-filter in the system, not the membrane on its own, that does the work.

Evaporation

Chlorine is volatile, meaning it shifts from liquid to gas on its own over time. If money is tight, you can simply let the water breathe.

Fill a pitcher, leave it uncovered on the counter or in the fridge, and most of the free chlorine will drift off within about 24 hours. Warmth speeds it up, so room-temperature water clears faster than cold, and an occasional stir helps even more. That makes it a fit for watering plants or topping up a fish tank, where standing time costs nothing.

This method does nothing for chloramine. If your city uses it, the water can sit for days without much changing.

Chemical Neutralization

Using a chemical to clear a chemical sounds backward, but brewers and winemakers do it every day.

Potassium metabisulfite, sold as Campden tablets, is a strong scavenger that neutralizes both chlorine and chloramine almost instantly. A single tablet treats up to 20 gallons of water, which is why homebrewers reach for it before a mash.

Vitamin C (ascorbic acid) is the other solid option, and it is the one to know if chloramine is your problem. It reduces both chlorine and chloramine to harmless chloride within seconds, it is edible, and it does not need plumbing, so a crushed tablet stirred into a bathtub gives you a chlorine-free soak.

Boiling

When you need chlorine-free water for cooking or tea, the stove works. Heat speeds up evaporation, and the CDC puts a rolling boil of roughly 15 minutes at the point where free chlorine has been driven off.

Boiling handles free chlorine only. Chloramine is heat stable, so it stays in the pot no matter how long the water bubbles.

UV Light

Ultraviolet (UV) light is best known for killing bacteria, but a strong enough dose also breaks down chlorine and chloramine.

As water passes through a high-output UV chamber, the light energy splits the chemical bonds holding the chlorine together. It is a physical process that adds nothing to the water and leaves the taste alone.

Effective as it is, UV usually rides along as one stage of a larger filtration setup rather than a standalone chlorine solution.

FAQs

Conclusion

Chlorine does essential work in modern sanitation, heading off waterborne disease every single day. Once the water reaches your faucet, though, that work is finished, and what is left can dry your skin, dull the taste of your drinks, and add byproducts you would rather not swallow.

Start by checking your utility’s water quality report. If you have plain chlorine, a carbon pitcher or a pitcher left out overnight is enough. If you have chloramine, skip the boiling and the counter pitcher and go straight to catalytic carbon, reverse osmosis, or vitamin C.