If fly larvae are found in your water supply, what should you first inspect?

When fly larvae are discovered in a water supply, the first step should be to inspect the condition of the screens on vents and overflows. This is crucial because these screens serve as barriers that prevent insects and other debris from entering the water system. If the screens are damaged, improperly installed, or have accumulated debris, they may not be effective in keeping out unwanted organisms, including fly larvae. Ensuring that these protective elements are intact and functioning properly helps to maintain the integrity of the water supply.

While other factors such as filters, treatment chemical levels, and the water source are important to monitor, the immediate concern when dealing with larvae is linked to how the water system is protected against contamination. Therefore, assessing the screens directly addresses the potential entry points for the larvae and can prevent further infestation.