The Rainfall Program has been operated and maintained by the Stormwater Management Division since its inception in 1986. The network has been improved throughout the years to its current "real-time" configuration. The network of gages collects rainfall data at fourteen locations within nine of Orange County's twelve major drainage basins. Montlhy and annual reports summarizing the collected data are available below:

 Annual Rainfall Reports

2006 Rainfall Report

2007 Rainfall Report

2008 Rainfall Report

Monthly Rainfall Reports 

January 2009 Rainfall Report

February 2009 Rainfall Report

March 2009 Rainfall Report

April 2009 Rainfall Report

May 2009 Rainfall Report

June 2009 Rainfall Report

July 2009 Rainfall Report

August 2009 Rainfall Report

September 2009 Rainfall Report

October 2009 Rainfall Report

Please click here for a rain gauge location map