How does pollution typically enter storm water?

Pollution typically enters storm water when industrial materials and operational procedures become exposed to precipitation, such as rain. This exposure can occur due to various factors, including inappropriate storage methods, leaks, spills, or inadequate containment measures. For example, if pollutants like oils, chemicals, or heavy metals are left uncontained or improperly managed, they can wash away into storm water systems during rain events.

This process is concerning because storm water drains often lead directly to waterways without treatment, meaning that pollutants can negatively affect water quality and aquatic ecosystems. Unlike the other choices, which imply a level of control or management that prevents pollution (like proper procedures or correct disposal), this correct option highlights the vulnerability of industrial operations to weather events and the associated risks of runoff carrying contaminants. Understanding this mechanism is critical for developing effective storm water management practices and complying with environmental regulations.