Importance of Groundwater



Groundwater is the largest source of usable and renewable fresh water in the world. It is water that soaks into the soil from rain and other precipitation that percolates through layers of rock and sand to fill the spaces between with water.

Depending on environmental conditions, such as the amount of rain that has fallen, groundwater renewal rates vary greatly. In the U.S., approximately 25% of all rainfall becomes groundwater.

The recent rain and snowfall we received in Santa Clarita in late 2016 and early 2017 have been helpful in replenishing groundwater resources; however, it may take several rainy seasons to fully replenish our groundwater supplies. This is important because half of our water supply in the SCV comes from groundwater and is used in our homes, businesses and for landscape irrigation.

Groundwater supplies are replenished, or recharged, by rain and snow melt that seeps down into the cracks and crevices beneath the land’s surface. The water table may be deep or shallow; and may rise or fall depending on many factors. Heavy rains or melting snow may cause the water table to rise, or heavy pumping of groundwater supplies may cause the water table to fall.