Final answer:
Surface water is the feature of this day which is not part of the ground water system.
Step-by-step explanation:
From the given information, we can conclude that the feature of this day which is not part of the ground water system is surface water. Although the majority of community water systems are supplied by ground water, more people are supplied year-round by community water systems that use surface water. Groundwater exists in the pores between particles in sand and gravel or in the fissures in rocks, while surface water refers to water found on the Earth's surface, such as rivers, lakes, and oceans.