Reporting Water Diversions

08/22/2016

REPORTING WATER DIVERSIONS

If you divert and use water from a surface water source such as a lake, creek, stream, or river, OR you divert water from a subterranean stream that flows in a known and definite channel, California law requires you to report your diversion and use to the State Water Board, Division of Water Rights. Water use reports shall be filed on an annual basis and shall document diversions made during the prior calendar year. The filing dates for the annual water use reports are summarized below:

DIVERSION/STORAGE PERIOD

WATER USE REPORT DEADLINES

PERMITS

LICENSES

STATEMENTS

REGISTRATIONS

CERTIFICATES

2015 and earlier

July 1, 2016

July 1, 2016

July 1, 2016

Varies

Not Required

2016 and thereafter

April 1, 2017

April 1, 2017

July 1, 2017

April 1, 2017

April 1, 2017

Note: Water use reporting requirements do not apply to individuals who receive all of their water through a municipal water system, such as a city public works system. Nor do they apply to individuals whose entire water diversions are delivered through a public or private water agency.  In these cases, the city, agency, or entity that delivers the water to you files the reports with the State Water Board.

On-line reporting is required for all water use reports. The Report Management System (RMS) is used by water right holders to submit the reports required as a result of their diversion and use of water. Four types of water use reports are currently supported by RMS:

  • Supplemental Statement of Diversion and Use (Information on filing an initial Statement of Water Diversion and Use form may be found on the Statement Program Webpage).
  • Report of Licensee
  • Progress Report by Permittee
  • Groundwater Extraction Notice

MEASUREMENT - GENERAL

All water right holders who divert more than 10 acre-feet of water per year are required to measure the water they divert. The measurement and monitoring requirements are summarized in the following table:

Type of Diversion
(af = acre-feet)

Installation Deadline

Required Accuracy

Required Monitoring Frequency

Qualifications For Installation And Certification

Direct Diversion >= 1,000 af/year
or
Storage >= 1000 af

January 1, 2017

10%

Hourly

Engineer/Contractor/Professional

Direct Diversion >= 100 af/year
or
Storage >= 200 af

July 1, 2017

10%

Daily

Engineer/Contractor/Professional

Direct Diversion > 10 af/year
or
Storage >= 50 af

January 1, 2018

15%

Weekly

Individual experienced with measurement and monitoring

Storage > 10 af

January 1, 2018

15%

Monthly

Individual experienced with measurement and monitoring