COVID-19 UPDATE | The City is coordinating closely with our public health officials at the Santa Cruz County Health Department to prevent the further spread COVID-19. In an effort to protect you and our community, changes and measures have been adopted in daily operations and activities. For further details please click here for the City’s Response to COVID-19

Where Does Our Water Come From?

Press Enter to show all options, press Tab go to next option

Water Map 

Ninety-five percent of Santa Cruz's water supply comes from local surface waters. The remaining 5% comes from groundwater. The main source of our water, the San Lorenzo River, makes up 47% of our supply. Other flowing sources include Majors Creek, Laguna Creek and Liddel Spring, which account for 32% of our supply.

The only reservoir for the City of Santa Cruz is Loch Lomond Reservoir, which holds 2.8 billion gallons.

Still Morning on Loch Lomond 

Loch Lomond Reservoir stores water from the Newell Creek watershed and the San Lorenzo River

Through dams and pumps, water is piped from its source to the Graham Hill Water Treatment Plant. At the plant, raw surface water is cleaned, treated, tested and made into the high-quality, safe drinking water we enjoy.

Margo at scope

GHTP Tank, Summer 2014