Service Area Facts

Sweetwater Authority Boundaries

Gross land area (square miles): 41
  • Loveland reservoir: 5.1
  • Service area: 32
  • San Diego Bay: 3.7
  • City of San Diego: 0.2

Service Area

Total Service Area (square miles): 32
  • National City: 7.5
  • South Bay Irrigation District: 24.5

2016 Population Estimates (SANDAG)

Service area: Total 188,886
  • South Bay Irrigation District: 128,928
  • National City: 59,958

Service Connections (Meters)

Total: 33,131
  • Residential: 29,803
  • Commercial: 2,759
  • Government/Other: 537
  • Industrial: 32
  • Agricultural: 0

Pipelines

Average pipe age: 41 years
Total length
: 397 miles
  • 6-inch diameter and smaller: 151
  • 8 to 10-inch: 144
  • 12-inch: 64
  • 12 to 16-inch: 17
  • Larger than 16-inch: 24

Fire Hydrants

Total: 2,590
  • Bonita: 447
  • Chula Vista: 1,326
  • National City: 808

Emergency Interconnections & Pressure Zones

Emergency interconnections: 12
Pressure zones: 16 


Production

Fiscal Year 2016-17 total system production: 17,693 acre feet
  • Local reservoirs: 1,675 acre feet
  • National City wells: 1,781 acre feet
  • Imported water: 13,668 acre feet
  • Groundwater Desalination: 568 acre feet
  • Historical use imported (20 years): 56%
  • Maximum daily production: 22.1 million gallons per day (6-20-16)
  • Average daily production: 15.7 million gallons per day

Raw Water

Storage capacity: 54,466 acre feet
Aqueduct connection capacity: 64 cubic feet per second

Treated Water

 
  • Total storage reservoirs: 25
  • Total capacity (gallons): 42,835,200
  • Concrete reservoirs: 3
  • Concrete reservoir capacity (gallons): 32,000,000
  • Steel tanks: 16
  • Total hydro stations: 6
  • Hydro-pneumatic steel tanks: 6
  • Tank capacity (gallons): 10,835,200
  • Total pump stations: 17
  • Approximate total pumping capacity (gallons/minute): 36,000
  • Aqueduct connection capacity: 62 cubic feet per second

Sweetwater River Watershed

Total watershed (square miles): 230 
  • Lower watershed: 48
  • Middle watershed: 84
  • Upper watershed: 98

First Days

  • Kimball Brothers Water: May 26, 1869
  • Sweetwater Authority: February 3, 1972
  • Sweetwater Authority Operations: August 10, 1977

Wholesale Imported Water Cost

Per acre foot, from San Diego County Water Authority
January 2016
  • Raw water (Tier I and II): $885 / $1,059
  • Treated water (Tier I and II): $1,255 / $1,349

Budget

2016-2017 Operating and Capital: $55,159,300 


Water Equivalents

  • 1 cubic foot: 7.48 gallons
  • 1 acre-foot: 325,850 gallons
  • 1 million gallons: 3.07 acre feet
  • 1 million gallons/day: 1,120 acre feet/year