Chlorine has been used to disinfect public drinking water in the United States for over 100 years—and for good reason. Before widespread chlorination, waterborne diseases such as cholera and typhoid were common and often deadly.

Today, chlorine remains one of the most effective tools municipalities use to keep drinking water safe.

How Chlorine Works

Chlorine kills bacteria, viruses, and parasites by disrupting their cellular structure. Unlike UV or ozone treatment, chlorine continues disinfecting water as it travels through miles of pipes, protecting it from contamination before it reaches your tap.

Why Utilities Still Rely on Chlorine

• Affordable for large systems
• Proven effectiveness
• EPA-regulated with enforceable limits
• Works even in aging infrastructure

In states like Indiana, where many communities rely on older distribution systems, residual disinfectants like chlorine play a critical role.

Next: Chlorine in Drinking Water: Pros and Cons Every Homeowner Should Know