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The Bulletin 118 report series presents
the results of groundwater basin evaluations in California.
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| Water Quality
Investigations Report No. 3 |
| The Bulletin 118 series was preceded
by "Water Quality Investigations Report No. 3, Ground Water Basins
in California," published in 1952 by the Department of Public
Works Division of Water Resources (the predecessor of DWR). The purpose
of the report was to create a base index map of the "more important
ground water basins" for carrying out the Department's mandate
in Section 229 of the Water Code.
Report No. 3 identified 223 alluvium-filled valleys, which were
believed to be basins with usable groundwater in storage. A statewide
numbering system was created in cooperation with the State Water
Pollution Control Board (now known as the State Water Resources
Control Board) based on the boundaries of the nine Regional Boards.
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| Bulletin 118-75
(1975) |
| In 1975, the Department published Bulletin
118, California's Ground Water. The purpose of this report was to
summarize available information from the Department of Water Resources,
United States Geological Survey and other agencies for individual
groundwater basins to "…help those who must make decisions
affecting the protection, additional use, and management of the State's
ground water resources".
Bulletin 118-75 contained a summary of technical information for
248 of the 461 identified groundwater basins, subbasins and what
were referred to as "areas of potential ground water storage"
in California with maps showing their location and extent. The Bulletin
118-75 basin boundary definition was based on geologic and hydrogeologic
conditions, except where basins were defined by a court decision.
Bulletin 118-75 is currently being scanned and will be available
at this site electronically in the near future. Hard copy reprints
of the Bulletin 118-75 can be obtained through Bulletins and Reports,
California Department of Water Resources, P.O. Box 942836, Sacramento,
California 94236-0001.
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| Bulletin 118-80
(1980) |
In 1978, Senate Bill 1505 added Section
12924 to the California Water Code that stated:
"The Department shall, in conjunction with other public agencies,
conduct an investigation of the State's groundwater basins. The Department
shall identify the State's groundwater basins on the basis of geologic
and hydrogeologic conditions and consideration of political boundary
lines whenever practical. The Department shall also investigate existing
general patterns of groundwater pumping and groundwater recharge within
such basins to the extent necessary to identify basins which are subject
to critical conditions of overdraft."
The Department carried out this mandate under the assumption that
the Legislature directed the Department to consider political boundary
lines that would be appropriate for groundwater management purposes.
The Department of Water Resources published the report in 1980 as
Bulletin 118-80, Ground Water Basins in California, referred to
in this report as Bulletin 118-80. The report included 36 groundwater
basins with different boundaries from Bulletin 118-75. The changed
boundaries were the result of combining several basins based on
geologic or political considerations, and dividing the San Joaquin
Valley groundwater basin into many smaller subbasins, based primarily
on political boundaries. These changes resulted in the identification
of 447 groundwater basins, subbasins and areas of potential groundwater
storage. Bulletin 118-80 also identified eleven basins as subject
to critical conditions of overdraft.
Bulletin 118-80 is currently being scanned and will be available
at this site electronically in the near future. Hard copy reprints
of the Bulletin can be obtained through Bulletins and Reports, California
Department of Water Resources, P.O. Box 942836, Sacramento, California
94236-0001.
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| Others in the
Bulletin 118 Series |
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In addition to the statewide Bulletin 118 reports, there are fifteen
other publications in the 118 series that evaluate groundwater basins
in more specific areas of the State. These reports are listed below.
Bulletin 118-1.
EVALUATION OF GROUND WATER RESOURCES: SOUTH SAN FRANCISCO BAY.
- Volume 1. Fremont Study Area, August 1968.
- Volume 2. Additional Fremont Area Study, August 1973.
- Volume 3. Northern Santa Clara County Area, December 1975 (Santa
Clara Valley Water District).
- Volume 4. South Santa Clara County Area, May 1981.
- Appendix A: Geology, August 1967.
Bulletin 118-2.
EVALUATION OF GROUND WATER RESOURCES: LIVERMORE AND SUNOL VALLEYS,
June 1974
- Appendix A: GEOLOGY, August 1966.
Bulletin 118-3.
EVALUATION OF GROUND WATER RESOURCES: SACRAMENTO COUNTY, 1974.
Bulletin 118-4.
EVALUATION OF GROUND WATER RESOURCES: SONOMA COUNTY; GEOLOGIC
AND HYDROLOGIC DATA, December 1975 (County of Sonoma).
- Volume 1: Geologic and Hydrologic Data, December 1975.
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Volume 2. Santa Rosa Plain, September 1982.
- Volume 3. Petaluma Valley, June 1982.
- Volume 4. Sonoma Valley, February 1982.
- Volume 5. Alexander Valley & Healdsburg Area, June 1983.
Bulletin 118-6.
EVALUATION OF GROUND WATER RESOURCES: SACRAMENTO VALLEY, 1978.
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