This report details the results of a data search on the hydrology of the coastal watersheds between Ragged Point, San Luis Obispo County and the U.S. - Mexican Border. Included in this report are general hydrological descriptions of the drainage areas, in order to provide background information. These sections are followed by detailed accounts of the sources of hydrologic data which are available. Data of interest include streamflow history at the shoreline of streams and stream groups, volume-frequency analyses, historic hydrographs of major floods, sediment yield, effects of various structures and fire effects. Included in the discussion are the location of data, data formats available and indications of the quality of the data. Data gaps and limitations are noted, and recommendations are presented for reducing these limitations.

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