Chlorinated water is everywhere—most tap water systems worldwide use chlorine to kill germs. It keeps water safe from bacteria and other nasties, but does the chemical itself pose problems for your health or well-being?
If you’ve ever wondered about that swimming pool smell or the taste of your tap water, you’re not alone. Chlorine is added on purpose and at controlled levels. Those levels are usually safe for daily drinking, showering, and cooking. In fact, the World Health Organization and local water authorities monitor how much goes in to make sure it knocks out bugs without hurting people.
Still, some folks complain of dry skin, brittle hair, or a funny taste in their coffee. Sensitive people—including kids or those with eczema—might notice more irritation. Some studies show that swimming in highly chlorinated pools can cause eye redness or worsen asthma, especially for frequent swimmers. But for daily tap water, the amounts are much lower.
What about the long-term effects? Most research says typical chlorine levels in drinking water carry low risk. There’s chatter about byproducts called trihalomethanes (THMs), which show up when chlorine reacts with organic stuff in water. These byproducts have been linked with a tiny increase in certain cancer risks, but only when consistently exposed to high levels over decades. Most municipal water supplies keep THM levels well below safety guidelines.
Worried about what’s coming out of your tap? Basic steps can help. Carbon or charcoal water filters remove most chlorine taste and many byproducts. Letting water sit uncovered for an hour or boiling can cut down the smell for cooking or tea. If you own a pool, testing chlorine levels matters—a cheap test kit at the store can make sure you're in a healthy range.
For households using well water or sources without chlorine, the risk flips: bacteria and parasites may sneak in. Boiling or installing a home chlorine injector can actually make your water safer in these cases.
Thinking about cutting out chlorine entirely? Just remember: historical outbreaks of typhoid and cholera pretty much disappeared after cities began adding chlorine. Clean, treated water saves lives, especially in places where other water treatments aren’t available.
At the end of the day, chlorinated water is a trade-off. It’s about balancing germ protection with the mild inconvenience of taste or minor irritation for those who are sensitive. If you have concerns, a simple filter or talking to your local water supplier can clear up what’s actually in your water—and help you make the best choice for your family’s health.
Swimming in chlorinated water may be beneficial for people with acne. The chlorine can kill bacteria and reduce inflammation, which could reduce outbreaks. Studies have also found that swimming in chlorinated water can reduce inflammation and irritation in the skin. Additionally, swimming in chlorinated water can provide a soothing and calming effect on the skin and reduce stress, which can also help to reduce acne. Therefore, swimming in chlorinated water could be a helpful way to reduce the severity of acne.