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Water Resources

The mission of the Water Resources Division is to be a reliable resource for floodplain management, flood warning information and hydrology expertise including technical support. Areas of responsibility include, FEMA mapping and levee certification coordination, flood hazard review for areas adjacent to flood control facilities, operating and maintaining the County?s Automated Local Evaluation in Real Time (ALERT) system, providing real time storm data, and drainage master plan support.

Data Requests Other Realtime Data FEMA Flood Insurance
Rate Map Online Data San Timoteo LOMR

Flood Hazard Review Section

The Flood Hazard Review section analyzes documents prepared by consultants both for the District and private developers. This section looks into new technologies that deal with prediction of channel and floodplain flows to see how they fit with historical events. The Methodology of floodplain analysis currently utilized by the District was developed by the U.S. Army Corps of Engineers.

Master Planning Section

The Master Planning Section reviews and prepares the Hydrology models for Master Plan of Drainage (MPD) studies and/or Comprehensive Storm Drain Plan (CSDP) studies for large areas. The study areas are usually very large, and therefore are less precise than that which would be required for a specific project. Oftentimes specific projects require a more focused Hydrology study. The main purpose for the MPD and CSDP is to provide a planned network of flood control facilities and to provide a basis for establishing funding mechanisms.

The MPD and CSDP documents are beneficial as guidelines for future flood control facility improvements, planning and coordinating future development activities, and as a basis for developing funding mechanisms. It should be noted that the MPD and CSDP studies are conceptual studies which identify facilities to effectively convey and control storm runoff.

Hydrology Section

The Hydrology Section collects a variety of climatology data from around the County. Precipitation, stream flow, and temperature comprise most of the available data, though not all of it is accessible online. This data is stored in a specialized database and is used in flood control storm warnings, structure and channel design, runoff calculations, environmental studies, and as supporting evidence in claims and litigations. Well data is no longer being collected in the section, and all our previous ground water data has been turned over to the Water Resources Institute

Most of our summarized data is available for downloading. There are more specialized products that can be requested by contacting our office at the number shown below. There is also quite a bit of data that is in our database but is not online that can also be requested.

Addendum FAQ's (pdf) Hydrology Manual (pdf)
AMC Map (pdf) Addendum to Hydrology Manual (pdf)


THE CLIMATOLOGICAL DATA HEREIN IS TO PROVIDE THE PUBLIC WITH CURRENT AND HISTORICAL DATA THROUGHOUT SAN BERNARDINO COUNTY. The data available on this website, including all measurements, maps, tables, measuring dates, and locations, (hereinafter collectively referred to as the INFORMATION), is provided on an As Is, As Available, and With All Faults basis. The San Bernardino County Flood Control District, The County of San Bernardino, its Department of Public Works, its officials and employees, hereinafter refer to as "County" makes no warranty of any kind for this INFORMATION, expressed or implied, including but not limited to any warranties of merchantability or fitness for a particular purpose, nor shall the distribution of this INFORMATION constitute any warranty. The data and INFORMATION contained on this website is subject to change without notice.

INFORMATION on this site is not intended to constitute advice nor is to be used as a substitute for specific advice from a licensed professional. You should not act (or refrain from acting) based upon INFORMATION on this site without independently verifying the original source of the INFORMATION and, as necessary, obtaining professional advice regarding your particular facts and circumstances.

References to any specific commercial product, computer software, process, service by trade name, trademark, website, or manufacturer does not constitute or imply endorsement or recommendation by the County.

For Information Please Contact:

Kenneth C. Eke, P.E. - Chief
(909) 387- 8213
Business Hours:
Monday - Friday
8 AM - 5 PM
Note: services such as water quality reports, water meter and water usage information, and other domestic water issues are covered by local water companies and other agencies.

Copyright 2007. All rights reserved. Department of Public Works, County of San Bernardino, California