Stanford University

327 Bonair Siding

Stanford, California   94305-7272

Phone: (650) 723-9747                               Fax: (650) 723-3191

Web: http://lbre.stanford.edu/sem/Environmental_WaterEfficiency

 

Service Area

 

The Stanford Utilities Division supplies water to the campus area and nearby Stanford unincorporated lands.

 

System

 

Profile

 

Area Size

3.1 square miles

Service Population

30,486 *

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)

2.86

Avg. Day Purchases From SF RWS (mgd)

1.89 **

%  Demand Met With SF RWS Supplies

66.2% (100% of drinking water)

Average Day Local Water Production (mgd)

1.08

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.

 

**The 2.10 mgd reported is Stanford’s FY 2013-14 consumption for the campus, Stanford’s service area, in unincorporated Santa Clara Co. In 2013, Stanford University was requested to supply domestic water through the emergency intertie at Roth Way to the Stanford Hospital, located in the Palo Alto service area. The request was to assist Palo Alto and the Hospital due to insufficient water pressure in that location of Palo Alto’s water system. During the FY13-14 reporting period water served through the emergency intertie was a total of 59,878,148 gallons (July 2013 through June 2014) or 0.16 mgd on average which will be included in Palo Alto’s Average Day Purchases from SF RWS.

 

*** In FY-08-09, Stanford completed a recycled water plant that treats wastewater from the Central Energy Facility cooling tower blow-down for reuse for toilet and urinal flushing in new buildings.

 

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
FY 11-12
(ccf)

Actual
FY 12-13
(ccf)

Actual
FY 13-14
(ccf)

Actual
FY 14-15
(ccf)

San Francisco Water

1,051,794

1,029,129

1,024,277

923,813

Local Groundwater

103,484

135,286

497,660

313,982

Surface Water

449,424

460,140

31,335

158,579

Other

0

0

0

0

Total

1,604,702

1,624,555

1,553,272

1,396,374

mgd equivalent

3.29

3.33

3.18

 2.86

 

 

 

 

 

Demand by Sector

 

 

 

 

Residential

418,791

417,190

421,060

360,634

Commercial/Industrial

260,661

223,325

259,044

239,727

Other

272,539

281,363

276,377

263,966

Dedicated Irrigation

640,643

683,873

596,791

532,045

Unaccounted for

12,068

18,804

0

2

Total

1,604,702

1,624,555

1,553,272

1,396,374

mgd equivalent

3.29

3.33

3.18

2.86

 

 

 

 

 

Per Capita Use

Actual
FY 11-12
(gpcpd)

Actual
FY 12-13
(gpcpd)

Actual
FY 13-14
(gpcpd)

Actual
FY 14-15
(gpcpd)

Residential

n/a

n/a

n/a

n/a

Gross

114

113

107

94

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
(in.)

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

San Juan*

0

 

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

 

8,000,000

 

Well 4R

400

Inactive

 

*Currently out of service

 

Well 5

500

Standby

 

Total

3100**