Chlorine is cheap. It’s effective. And it saves millions of lives every year. The World Health Organization calls it one of history’s greatest public health achievements.
But it’s not perfect. It can react with leaves and dirt to form trihalomethanes—chemicals that, in huge amounts, might be risky. So water plants monitor it like hawks. No rogue chemicals on their watch.
The key is balance. Too little chlorine = disease. Too much = funny taste. It’s the Goldilocks of disinfectants.
Pros and Cons of Chlorination in Drinking Water Treatment - Olympian
How You Can Test Your Own Water (Fun Home Experiment!)
Buy a simple pool test strip from the drugstore. Dip it in your tap water. Watch the little pads change color. You’ll see if you have free chlorine (active killer) or combined chlorine (used-up leftovers).
If the level is zero, your water might be stale. Let it run for 30 seconds first. Running water usually has fresh chlorine from the treatment plant.
You can also smell-test: a faint bleach smell is fine. A strong stink means the chlorine is reacting with something. Call your water company and say, “Hey, my tap smells like a pool day.” They’ll love that.
