Mid-Peninsula Water District

Three Dairy Lane

Belmont, California  94002-0129

Phone: (650) 591-8941                               Fax: (650) 591-4998

Web: http://www.midpeninsulawater.org

 

Service Area

 

The Mid-Peninsula Water District, located in central San Mateo County, serves the
city of Belmont, portions of San Carlos, and unincorporated county areas. The predominant land use is residential.

 

System

 

Profile

 

Area Size

5 square miles

Service Population

26,730

Number of Accounts

7,974

Number of SF RWS Connections

2

Connections To SF RWS Mains

BDPL 1 and 2, Crystal Springs Bypass Tunnel

Avg. Day Demand (mgd)

2.48

Avg. Day Purchases From SF RWS (mgd)

2.48

%  Demand Met With SF RWS Supplies

100.0%

Maximum Local Water Production (mgd)

0

Alternative Supply Sources

None

Interties With Other Agencies

Estero MID, Redwood City, CWS - San Mateo, CWS - San Carlos

Local Storage (mg)

12.5

Days of Storage

3.6 - All zones can meet the 8 hr criteria either separately or by pumping from zones with excess capacity.

 

Summary

 

The District’s sole source of potable water is delivered via two SF RWS turnouts. Local water storage is not feasible, and groundwater of adequate quantity and quality is not available.

 

The system contains 9 pressure zones. The easternmost zone, east of El Camino Real, is gravity fed from the SF RWS connection. Water is pumped to storage reservoirs at higher elevations to feed the remaining pressure zones. The District operates and maintains a complex distribution system that includes 20 pumps, 11 water tanks, 13 regulating valves, 813 hydrants, and 105 miles of water mains.

 

The District also has redundancy built into the entire distribution system, enabling either of the two SF RWS transmission mains to supply water to all customers of the District. The District has the ability to transfer water between pressure zones in either a pump-up or flow-down mode in emergency conditions.

 

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

1,437,360

1,453,047

1,408,109

1,209,300

Local Groundwater

0

0

0

0

Surface Water

0

0

0

0

Recycled Water

0

0

0

0

Other

0

0

0

0

Total

1,437,360

1,453,047

1,408,109

1,209,300

mgd equivalent

2.95

2.98

2.89

 2.48

 

 

 

 

 

Demand by Sector

 

 

 

 

Residential

1,016,212

1,004,087

993,343

834,024

Commercial/Industrial

182,696

259,889

258,172

234,417

Other

70,228

86,613

83,953

71,882

Unaccounted for

168,224

102,458

72,641

68,977

Total

1,437,360

1,453,047

1,408,109

1,209,300

mgd equivalent

2.95

2.98

 2.89

2.48

 

 

 

 

 

Per Capita Use

Actual
FY 11-12
(gpcpd)

Actual
FY 12-13
(gpcpd)

Actual
FY 13-14
(gpcpd)

Actual
FY 14-15
(gpcpd)

Residential

79

78

77

64

Gross

112

113

110

93

 

Facilities and Distribution

Storage Reservoirs

 

Designation

Type

Capacity (mg)

 

Designation

Type

Capacity (mg)

Storage Tank 1

Steel

2.50

 

Storage Tank 7

Steel

0.79

Storage Tank 2

Steel

2.50

 

Storage Tank 8

Steel

0.79

Storage Tank 3

Steel

1.00

 

Storage Tank 9

Steel

0.10

Storage Tank 4

Steel

1.50

 

Storage Tank 10

Steel

0.10

Storage Tank 5

Steel

1.00

 

Storage Tank 11

Steel

1.50

Storage Tank 6

Steel

0.72

 

 

 

 

 

 

 

 

Total

 

12.50

 

Interties

 

Name

No.

Diameter
(in.)

 

Name

No.

Diameter
(in.)

Estero

1

12

 

CWS - San Carlos

2

8

Redwood City

1

12

 

CWS - San Mateo

3

8