The user of the data is responsible for any errors resulting from data manipulation of this rainfall data. The user must be knowledgeable in using Excel as OC Public Works Staff are not available to provide software support for this data format. For general information on rainfall data please contact OC Watersheds at (714) 955-0600 or CLICK HERE to send an email
Excel spreadsheets and location maps for historic rainfall stations can also be found here on an interactive Weather Data Map.
Environmental Data Management Section publishes a Hydrologic Data Report containing data dating back as far as the late 1800s. New data is added each year from reporting (via radio telemetry) rain gages, recording non-reporting rain gages, and non-recording cooperative observer (maintained by volunteers) rain gages, and reporting water level stations.*
These hydrologic data, coupled with satellite and radar tracking of storms, are used for flood detection, allowing maintenance crews to be assigned to potential problem areas. The result is a better allocation of resources and enhanced public safety. The data are also used for a variety of other municipal purposes by the private sector.
If there are any questions regarding the details of a document, or to obtain a hard copy or other alternative formats of the original document, or to have a document read to you, please contact the OC Public Works offices, Monday through Friday, 7:00 am to 5:00 pm PST, at 2301 N. Glassell St., Orange, CA, 92865 by email at OC Watersheds, or by phone at (714) 955-0600.
*As of 2005, hydrologic data is available upon request as raw datasets.
Although the data provided using the County of Orange, OC Public Works systems has been produced and processed from sources believed to be reliable, no warranty expressed or implied is made regarding accuracy, adequacy, completeness, legality, reliability or usefulness of any information. The County of Orange, OC Public Works provides this information on an "as is" basis. All warranties of any kind express or implied, including but not limited the implied warranties of merchantability, fitness for a particular purpose are disclaimed.
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