Department of Public Works
Precipitation active link

  Displays 1, 3, 6, 12, 24, 36, 48, and 72 hours duration and the last 30 days of precipitation data. Map identifies the locations of 62 raingages located throughout Los Angeles County. Updated every 10 minutes.
See data  

  131 Manually Observed Non-Mechanical Rain Gages; These gages are measured once daily by volunteers and reported monthly.
See table  

  130 ALERT(Automatic Local Evaluation in Real Time)/Automatic rain gages; These sites use tipping buckets with real-time data telemetry and/or electronic data loggers to indicate rainfall totals and intensities.
See table  

All hydrologic data may be obtained by writing to:

Los Angeles County Department of Public Works
Water Resources Division
Hydrologic Records
P. O. Box 1460
Alhambra, CA 91802-1460

or telephone: (626) 458-6120
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