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facts 2007 |
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Sweetwater Authority Boundaries |
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Gross land area (sq. miles) |
41 |
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Loveland reservoir |
5.1 |
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Service area |
32 |
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San Diego Bay |
3.7 |
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City of San Diego |
0.2 |
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Service Area |
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Total Service Area (sq. miles) |
32 |
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National City |
7.5 |
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South Bay ID |
24.5 |
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2007 Population estimates (SANDAG) |
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Service area |
total 183,327 |
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South Bay ID |
125,115 |
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National City |
58,212 |
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Service Connections |
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(as of June 2007) |
total 32,592 |
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Residential |
29,369 |
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Commercial |
2,669 |
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Government/Other |
509 |
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Industrial |
37 |
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Agricultural |
8 |
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Pipelines |
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Total length |
391 miles |
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6 inch diameter and smaller |
157 |
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8 to 10 inch |
142 |
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12 inch |
54 |
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14 to 16 inch |
13 |
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larger than 16 inch |
25 |
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Average pipe age |
36.19 years |
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Public Fire Hydrants |
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Total as of June 2007 |
2,492 |
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Bonita |
445 |
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Chula Vista |
1,274 |
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National City |
773 |
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Emergency Interconnections & pressure zones |
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Total emergency interconnections |
11 |
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Pressure zones |
16 |
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Production |
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2005-06 total system production |
24,349 af |
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Local reservoirs |
11,524 af |
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NC wells |
1,670 af |
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Imported water |
8,884 af |
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Groundwater Desalination |
2,271 af |
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Historical use imported (20 yrs) |
47.4% |
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Maximum daily consumption-98 |
30.1 mgd |
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Average daily consumption |
21.9 mgd |
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Raw Water Storage |
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Total capacity |
53,466 af |
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Treated Water |
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Total storage reservoirs |
25 |
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Total capacity (gallons) |
42,835,200 |
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Concrete reservoirs |
3 |
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Concrete reservoir capacity (gallons) |
32,000,000 |
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Steel tanks |
16 |
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Hydro-pneumatic steel tanks |
6 |
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Tank capacity (gallons) |
10,835,200 |
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Total pump stations |
17 |
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Approximate total pumping capacity (gallons/minute) |
36,000 |
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Sweetwater River Watershed |
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Total watershed (sq. miles) |
182 |
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Lower watershed |
38 |
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Middle watershed |
42 |
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Upper watershed |
102 |
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First Days |
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Kimball Brothers Water |
May 26, 1869 |
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Sweetwater Authority |
Feb. 3, 1972 |
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SWA Operations |
Aug. 10, 1977 |
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Wholesale Imported Water Cost
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Raw water (Tier I & II) |
$425 / $487 |
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Treated water (Tier I & II) |
$572 / $634 |
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Budget |
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2007-2008 Operating and capital |
$43,711,500 |
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Water Equivalents |
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1 cubic foot |
7.48 gal. |
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1 acre-foot |
325,850 gal. |
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1 million gallons |
3.07 af |
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1 million gallons/day |
1,120 af/year |
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Key to Abbreviations |
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af = acre feet |
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mgd = million gallons per day |
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