Stanford University
327 Bonair Siding
Stanford, California 94305-7272
Phone: (650) 723-9747 Fax: (650) 723-3191
Web: suwater.stanford.edu
Service Area
The Stanford Sustainability & Energy Management Department supplies water to the campus area and nearby Stanford unincorporated lands.
System
Profile
|
Area Size |
3.1 square miles |
|
Service Population |
33,827* |
|
Number of Accounts |
n/a |
|
Number of SF RWS Connections |
3 |
|
Connections To SF RWS Mains |
BDPL 3 and 4, 1 turnout off Palo Alto pipeline |
|
Avg. Day Demand (mgd) |
2.50 |
|
Avg. Day Purchases From SF RWS (mgd) |
1.39 |
|
% Demand Met With SF RWS Supplies |
55.45% (100% of drinking water) |
|
Average Day Local Water Production (mgd) |
1.1 |
|
Alternative Supply Sources |
Local groundwater, surface water, recycled water** |
|
Interties With Other Agencies |
Palo Alto |
|
Local Storage (mg) |
8 |
|
Days of Storage |
2.5 to 4 - All 3 zones can meet the 8 hr criteria either separately or by pumping from zones with excess capacity. Wells can supply an additional 3.7 mgd in an emergency. |
*Average daytime population is used for current and future projections. In FY 2020-21, Stanford’s population dropped significantly due to most students and faculty remaining home during the COVID-19 pandemic.
** In FY-08-09, Stanford completed a recycled water plant that treats wastewater from the former Cogeneration Facility cooling tower blow-down for reuse for toilet and urinal flushing in new buildings. The plant was decommissioned in 2015 with the construction of the Stanford Energy System Innovations (SESI) Central Energy Facility. Source water for the recycled water system was lost but the infrastructure remains and can resume using recycled water once another source is established.
Summary
Stanford has four sources of water supply: purchased potable water from the SF RWS, groundwater, non-potable surface water from the local watershed, and recycled water.
SF RWS water is delivered through two turnouts off BDPL 3 and 4 and one turnout off the Palo Alto pipeline. There are four wells located on Stanford property that could be used in an emergency. Three of the wells are in compliance with all drinking water standards, while the fourth well is “standby”, since its manganese levels exceed current standards.
Stanford also has a non-potable (lake) water system that supplies more than 80% of its irrigation needs, significantly reducing Stanford’s use of potable water for irrigation. This system is typically supplied by Stanford’s surface water diversions, and supplemented by ground water. The extent of ground water use depends on the amount of rainfall and resulting surface water supply availability. The lake water system can also be supplied as needed by SF RWS water.
Water Supply and Demand
|
Supply by Source |
Actual |
Actual |
Actual |
Actual |
|
San Francisco Water |
699,352 |
659,830 |
714,224 |
677,245 |
|
Local Groundwater |
0 |
0 |
0 |
0 |
|
Recycled Water |
0 |
0 |
0 |
0 |
|
Other |
521,726 |
538,983 |
513,069 |
544,139 |
|
Total |
1,221,078 |
1,198,813 |
1,228,492 |
1,221,384 |
|
mgd equivalent |
2.50 |
2.46 |
2.52 |
2.50 |
|
Note: The source of water contributing to the non-potable irrigation water have been tracked through various methods in order to fit within the format of the Annual Survey. Prior to the 2014-2015 Annual Survey, the volume entering storage was subtracted from total surface water diverted and water used from storage. Prior to the 2015-2016 Annual Survey, all water coming from storage was assumed to be surface water. In order to better reflect the sources of water used in the non-potable irrigation system, beginning in the 2015-2016 Annual Survey the source of stored water is being accounted for by tracking the volume of groundwater that enters and is used from storage. Assumptions for this new method include a starting point of zero groundwater in the non-potable irrigation system storage as of July 2013, surface water entering storage first, and groundwater used from storage first. In the FY 2017-18 and FY 2018-19 Annual Survey, additional tracking of captured construction dewatering water for use as irrigation water is also included (other, non-potable alternative water supply). |
||||
|
Demand by Sector |
|
|
|
|
|
Residential |
381,216 |
383,290 |
281,216 |
402,723 |
|
Commercial/Industrial |
73,482 |
72,869 |
72,962 |
65,310 |
|
Other |
160,343 |
123,189 |
154,952 |
283,297 |
|
Dedicated Irrigation |
540,451 |
540,451 |
540,451 |
425,485 |
|
Non-Revenue |
65,587 |
79,014 |
78,911 |
44,569 |
|
Total |
1,221,078 |
1,198,813 |
1,228,492 |
1,221,384 |
|
mgd equivalent |
2.50 |
2.46 |
2.52 |
2.50 |
| Notes: The new SESI Central Energy Facility uses 70% less water than the former Cogeneration Facility, which caused the commercial/industrial demand to decrease beginning in April 2015. Due to the differing bill period schedules of SFPUC and Stanford, reporting for the Annual Surveys between 2011 and 2015 included the difference between Production and total Consumption within the customer categories. The difference between Production and Consumption totals includes both the different bill period schedules of SFPUC and Stanford, and actual unaccounted for water. Beginning in the 2015-2016 Annual Survey the full difference is reported in the "Non-Revenue Water" category. | ||||
|
Per Capita Use |
Actual |
Actual |
Actual |
Actual |
|
Residential |
n/a |
n/a |
n/a |
n/a |
|
Gross |
78 |
180 |
78 |
74 |
|
Note: Due to its unique service area, Stanford’s residential per capita numbers are excluded. |
||||
Facilities and Distribution
|
Storage Reservoirs |
|
Wells |
|
|
|
Interties |
|
|
||
|---|---|---|---|---|---|---|---|---|---|---|
|
Designation |
Type |
Capacity (gallons) |
|
Name |
Capacity (gpm) |
Status |
|
Name |
No. |
Diameter |
|
Foothill 1 |
|
2,000,000 |
|
Well 1 |
500 |
Active |
|
Roth Way |
1 |
8 |
|
Foothill 2 |
|
6,000,000 |
|
Well 2 |
500 |
Active |
|
Sandhill |
1 |
8 |
|
Reservoir 3 (Formally San Juan*) |
1,500,000 |
|
Well 3R |
1200 |
Active |
|
**Actual total well capacity will be less than total indicated. Simultaneous pumping of wells will affect the individual well pumping rates. Wells are periodically taken out of service for maintenance |
|||
|
Total |
|
9,500,000 |
|
Well 4R |
400 |
Inactive |
|
|||
|
*Rehabilitated reservoir was brought into service in November 2019. |
|
Well 5 |
500 |
Standby |
|
|||||
|
Total |
3100** |
|||||||||
|
|
|
|
|
|
|
|
||||