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Background
There are currently 431 groundwater basins delineated, underlying
about 40 percent of the surface area of the State. Of those, 24
basins are subdivided into a total of 108 subbasins, giving a total
of 515 distinct groundwater systems. Additionally, many of the subbasin
boundaries were developed or modified with public input, but little
physical data. These boundaries should not be considered as precisely
defining a groundwater basin boundary; the determination of whether
any particular area lies within a groundwater basin boundary should
be determined only after a detailed local study.
The individual basin descriptions on this website are based on evaluation
of the best available information. In basins where many studies
have been completed and the basin has been operated for a number
of years, the basin response is fairly understood and the boundaries
are well defined. Even in these basins, however, there are many
unknowns and changes in the boundaries may result as more information
about the basin is collected and evaluated.
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