Where should storm water not be discharged?

Discharging storm water into groundwater is not advisable because it can lead to contamination of the aquifers that supply drinking water. Groundwater often serves as a crucial resource for irrigation and home use, and introducing storm water, which can carry pollutants such as oils, heavy metals, and chemicals from urban areas, poses significant risks to public health and environmental quality.

Groundwater is typically more vulnerable to contamination since it is stored below the surface, making it difficult to monitor and remediate if pollutants are introduced. In contrast, discharging storm water into lakes, rivers, or dry wells can be managed with appropriate treatment processes and is often regulated to ensure that the water quality is maintained. Therefore, the correct choice highlights the importance of protecting groundwater from potential pollutants associated with storm water runoff.