Overall Rating Gold - expired
Overall Score 71.18
Liaison Kelli O'Day
Submission Date Sept. 13, 2013
Executive Letter Download

STARS v1.2

University of California, Davis
OP-T2-46: Non-Potable Water Usage

Status Score Responsible Party
Complete 0.25 / 0.25 Camille Kirk
Director of Sustainability and Campus Sustainability Planner
Office of Sustainability
"---" indicates that no data was submitted for this field

Does the institution use non-potable water (e.g., harvested rainwater or graywater) for irrigation and/or other applications?:

A brief description of the source of non-potable water and how it is used:

The campus has a dedicated non-potable water system used for landscape irrigation on the central campus. This system pumps lower- quality shallow groundwater for supply. This system decreases demand on the higher-quality potable water supply. Additionally, the campus wastewater treatment plant produces reclaimed water that can be used without restrictions for irrigation. The reclaimed water is used for landscape irrigation in the wastewater treatment plant district. Lastly, a rainwater harvesting system is in place at the Robert Mondavi Institute for Food and Wine. The system has 4 tanks with a storage capacity of 176,000 gallons. The water is used for non-potable uses within the building (e.g., toilet flushing).

Tertiary-treated wastewater from the on-campus wastewater treatment plant is used for irrigation of landscaping at the treatment plant. This is a pilot project to learn how the landscape performs with the tertiary-treated water.

The percentage of irrigation water usage from recovered, reclaimed or untreated sources :

The percentage of building space using water from recovered, reclaimed or untreated sources:

The percentage of water used in utility plants from recovered, reclaimed or untreated sources:

The website URL where information about the program, policy, or practice is available:

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.