What Is Chlorine Residual and Why It Is Important in Water Treatment?
Posted by David Cannon on 22nd Oct 2026
Chlorine is widely used in drinking water treatment to control harmful microorganisms and maintain water quality. However, adding chlorine is only one part of the disinfection process. Monitoring chlorine residual in water treatment helps operators assess the disinfectant remaining in treated water. This guide explains what chlorine residual is, its importance in water treatment, recommended levels for drinking water, and how it is measured and monitored.
What Is Chlorine Residual in Water Treat