CDPH Water Distribution Grade 2 Practice Test

The two primary types of water sources are surface water and groundwater because they represent the main categories through which water is naturally sourced for various uses, including drinking water supply, irrigation, and industry.

Surface water includes any water bodies such as lakes, rivers, streams, and reservoirs that are found above ground. This type of water is typically subject to evaporation and pollution but can be readily accessed and treated for direct use.

Groundwater refers to the water found beneath the Earth's surface in aquifers, which are geological formations that can store and transmit water. Groundwater is often tapped for drinking water through wells and is typically protected from some forms of contamination, making it a vital source, particularly in areas where surface water is scarce.

Understanding the distinction between surface water and groundwater is fundamental when discussing water supply management, conservation practices, and the overall water cycle. Knowing these two main types helps professionals address issues related to water sustainability and resource allocation effectively.