Purissima Hills Water District
26375 Fremont Road
Los Altos Hills, California 94022-2699
Phone: (650) 948-1217 Fax: (650) 948-0961
Service Area
The Purissima Hills Water District provides service to two-thirds of the Town of Los Altos Hills, a rural community adjacent to the City of Palo Alto, and unincorporated county land on the southern boundary. The District serves predominantly single-family homes on minimum one-acre lots. The largest customer is Foothill College.
System
Profile
|
Area Size |
4,600 acres |
|
Service Population |
7,350 |
|
Number of Accounts |
2,132 |
|
Number of SF RWS Connections |
2 |
|
Connections To SF RWS Mains |
BDPL 3 and 4 |
|
Avg. Day Demand (mgd) |
1.31 |
|
Avg. Day Purchases From SF RWS (mgd) |
1.31 |
|
% Demand Met With SF RWS Supplies |
100.0% |
|
Maximum Local Water Production (mgd) |
0 |
|
Alternative Supply Sources |
None |
|
Interties With Other Agencies |
CWS - Los Altos, City of Palo Alto |
|
Local Storage (mg) |
9.88 |
|
Days of Storage |
All 4 distribution zones can meet the 8 hr criteria either separately or by pumping from zones with excess capacity |
Summary
Purissima Hills Water District receives 100% of its water supply from two San Francisco/Hetch Hetchy turnouts located along the Foothill Expressway on the northern edge of the District. The SF RWS supply is gravity-fed through 18" transmission mains to the Deer Creek Pump Station and McCann Tanks at 250 feet above sea level.
All services within the District are gravity fed from tanks in the respective zones. The distribution system consists of 4 pressure zones, 11 tanks, 5 pumping stations, 15 pumps, and 80 miles of pipe.
Water Supply and Demand
|
Supply by Source |
Actual |
Actual |
Actual |
Actual |
|
San Francisco Water |
851,999 |
925,721 |
799,210 |
639,836 |
|
Recycled Water |
0 |
0 |
0 |
0 |
|
Other |
0 |
0 |
0 |
0 |
|
Total |
851,999 |
925,721 |
799,210 |
639,836 |
|
Mgd equivalent |
1.75 |
1.90 |
1.64 |
1.31 |
|
|
|
|
|
|
|
Demand by Sector |
|
|
|
|
|
Residential |
746,898 |
823,222 |
746,898 |
572,579 |
|
Commercial/Industrial |
0 |
2 |
0 |
0 |
|
Other |
42,089 |
45,488 |
45,485 |
29,477 |
|
Dedicated Irrigation |
4,814 |
5,089 |
4,814 |
0 |
|
Non-Revenue Water |
58,198 |
51,920 |
2,013 |
393,4221 |
|
Total |
851,999 |
925,721 |
799,210 |
639,836 |
|
Mgd equivalent |
1.75 |
1.90 |
1.64 |
1.31 |
|
|
|
|
|
|
|
Per Capita Use |
Actual |
Actual |
Actual |
Actual |
|
Residential |
249 |
274 |
249 |
160 |
|
Gross |
284 |
308 |
266 |
178 |
Facilities and Distribution
Storage Reservoirs
|
Designation |
Type |
Capacity |
|
Designation |
Type |
Capacity |
|---|---|---|---|---|---|---|
|
MC Tank 1 |
Steel |
130,000 |
|
A Tank 1 |
Redwood |
200,000 |
|
MC Tank 2 |
Steel |
1,000,000 |
|
A Tank 2 |
Cor-ten Steel |
250,000 |
|
LC Tank 1 |
Steel |
100,000 |
|
N Tank 1 |
Cor-ten Steel |
200,000 |
|
LC Tank 2 |
Cor-ten Steel |
900,000 |
|
N Tank 2 |
Cor-ten Steel |
3,000,000 |
|
HH Tank |
Concrete |
3,100,000 |
|
PM Tank |
Cor-ten Steel |
500,000 |
|
E Tank |
Steel |
500,000 |
|
Total |
|
9,880,000 |
|
|
|
|
|
|
|
|
Interties
|
Name |
No. |
Diameter |
|
CWS - Los Altos |
2 |
8, 12 |
|
City of Palo Alto |
2 |
12, 12 |