Measuring Diverted Water

May 21, 2019

Measuring Diverted Water

May 21, 2019

Water Measurement and Reporting Course


This training will be held on

Friday June 7th, 2019

           from 1:00 p.m. – 4:30 p.m.

At the Santa Ynez Community Services District,

1070 Faraday St., Santa Ynez, CA 93460


Senate Bill 88 requires that all surface water right holders who have previously diverted or intend to divert more than 10acre-feet per year (riparian and pre1914 claims),or who are authorized to divert more than 10acre-feet per year under a permit, license, or registration, to measure and report the water they divert.  Detailed information on the regulatory requirements for measurement and reporting is available on the State Water Resources Control Board “Reporting and Measurement Regulation” webpage. The legislation as written requires that for diversion (or storage) greater than or equal to 100 acre-feet annually that installation and certification of measurement methods be approved by an Engineer/Contractor/Professional. Diverters across CA were concerned about this requirement. 

California Cattlemen's Association heard from their membership and worked with Assemblyman Bigelow on a bill that would result in a self-certification option. Assembly Bill 589 was passed and became law on January 1, 2018. This bill, until January 1, 2023, allows any diverter, as defined, who has completed this instructional course on measurement devices and methods administered by the University of California Cooperative Extension, including passage of a proficiency test, to be considered a qualified individual when installing and maintaining devices or implementing methods of measurement. The bill requires the University of California Cooperative Extension and the Board to jointly develop the curriculum for the course and theproficiency test.

At the workshop you will:

  • Clarify reporting requirements for farms andranches.
  • Understand what meters are appropriate for differentsituations.
  • Learn how to determine measurement equipmentaccuracy.
  • Develop an understanding of measurementweirs.
  • Learn how to calculate and report volume from flowdata.


Registration is required; there is a fee of $25.

Registration link here.



For questions, please contact Matthew Shapero at (805) 645-1475 or For other helpful resources regarding water measuring, reporting, and AB 589, please visit:

By Ben Faber
Author - Advisor

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