Test strips are convenient tools that enable rapid, semi-quantitative analysis of a variety of parameters. However, the detection limits of currently available free chlorine test strips are not low enough to confirm the required residual amounts of chlorine in drinking water. To monitor water quality and ensure public health, Creative Diagnostics established user-friendly lateral flow tests capable of detecting extremely small amounts of free chlorine in a short period of time. This innovative solution provides a reliable and convenient method of detecting free chlorine for efficient water quality management.