1. (a) General Measurement Datafiles. Measurement data collected before October 1, 2026 must be submitted in accordance with section 939.1. General measurement data collected on or after October 1, 2026 must be submitted in accordance with this subdivision. For each claimed water right that meets the general applicability criteria described in subdivision (a) of section 932, diverters must electronically submit general measurement datafiles to the board as follows:

   1. (1) General Measurement Datafile Contents. The reported values in each general measurement datafile must meet the following criteria:

      1. (A) General measurement datafiles must include the required general measurement data described in subdivisions (a) and (c) of section 933, as applicable, and include appropriate units. General measurement datafiles must distinguish between general measurement data relating to direct diversions, diversions to or collections to storage, rediversions, withdrawals from storage in qualifying reservoirs, and releases from qualifying reservoirs, as applicable.
      2. (B) The reported values in each general measurement datafile must reflect general measurement data for the claimed water right being reported. For a diverter or group of diverters that collectively measures under multiple claimed water rights, a separate general measurement datafile must be submitted for each claimed water right. Diverters may submit multiple general measurement datafiles for the same claimed water right.
      3. (C) The reported values in each general measurement datafile must be recorded, at a minimum, at the required frequency and accuracy described in subdivisions (h) and (i), respectively, of section 933. For measurements that must be collected on an hourly basis, the reported values included in the general measurement datafile may be aggregated to reflect daily or more frequent values of each general measurement parameter.
      4. (D) The reported values in each general measurement datafile must reflect general measurement data associated with the respective measurement location, point of diversion, or location where water is withdrawn or released from a qualifying reservoir, as applicable. Diverters may submit multiple general measurement datafiles for the same measurement location, point of diversion, or location where water is withdrawn or released from a qualifying reservoir.
   2. (2) General Measurement Datafile Submission Process. Diverters must either submit general measurement datafiles to the board's online reporting platform using an electronic, machine-readable template provided by the board or transmit general measurement datafiles directly to the board's online reporting platform.
   3. (3) General Measurement Datafile Submission Schedule. General measurement datafiles must be submitted to the board annually as specified in chapter 2.7 of this title. General measurement datafiles must also be submitted within 30 days of a request by the deputy director. Raw device output must be made available upon request.

2. (b) Large Diversion Submissions. Large diversion submission requirements described in this subdivision are in addition to the general measurement datafiles that must be submitted in accordance with subdivision (a). Measurement data collected before October 1, 2026 must be submitted in accordance with section 939.1. Large diversion measurement data collected on or after October 1, 2026 must be submitted in accordance with this subdivision. For each claimed water right and point of diversion that meets the large diversion applicability criteria described in subdivision (b) of section 932, diverters must electronically submit large diversion submissions to the board as follows:

   1. (1) Large Diversion Submission Contents. Large diversion submissions must reflect daily or more frequent values of each of the large diversion parameters described in subdivisions (b) and (c) of section 933, as applicable, and include appropriate units.

      1. (A) Provisional large diversion measurement data may be submitted for the purpose of meeting the requirements described in this subdivision, so long as the provisional measurement data are clearly labeled.
      2. (B) Diverters must indicate the identification numbers of all claimed water rights represented by the large diversion measurement data, but large diversion measurement data submitted under this subdivision do not need to be apportioned to each claimed water right.
      3. (C) Large diversion measurement data submitted under this subdivision do not need to distinguish between direct diversions, diversions to or collections to storage, or rediversions, or between withdrawals or releases from qualifying reservoirs.
      4. (D) The reported values in each large diversion submission must reflect large diversion measurement data associated with the respective measurement location, point of diversion, or location where water leaves a qualifying reservoir, as applicable. Diverters may submit multiple large diversion submissions for the same measurement location, point of diversion, or location where water leaves a qualifying reservoir.

   2. (2) Large Diversion Submission Process. For large diversion submissions, diverters must do one of the following:

      1. (A) Submit large diversion submissions to the board's online reporting platform using an electronic, machine-readable template provided by the board;
      2. (B) Transmit large diversion submissions directly to the board's online reporting platform; or
      3. (C) Post large diversion submissions to a website approved by the deputy director. Large diversion submissions posted in accordance with this subparagraph must be machine-readable and in a structured, tabular format. Diverters must identify the website where the large diversion submissions are posted and must provide the board with information necessary to easily associate the posted data with records in the board's online reporting platform, such as metadata regarding the measuring device, measurement location, and claimed water rights represented by the large diversion measurement data. The deputy director will approve or deny websites based on consideration of whether the website allows the public to view the large diversion measurement data without payment or login credentials, whether the website contains large diversion measurement data that are retrievable by the board's online reporting platform, and the number of diverters who post large diversion submissions to the website or the number of claimed water rights for which large diversion submissions are posted to the website. The deputy director must maintain and post on the board's website a list of approved websites to which large diversion submissions may be posted.
      4. (D) Before October 1, 2027, diverters may post large diversion submissions to a publicly accessible website in lieu of submitting in accordance with the processes described in subparagraphs (A), (B), or (C). Diverters must provide the board the exact website address or uniform resource locator (URL) where the large diversion submissions are posted.
   3. (3) Large Diversion Submission Schedule. Large diversion submissions must be submitted on a weekly basis, at minimum. Each large diversion submission must be submitted with a lag time of no more than 7 days between the date of the most recent measurement and the submission date.
3. (c) Data Retention. Diverters must maintain records of the raw device output from each measuring device for a period of not less than 10 years.

Note: Authority cited: Sections 1051, 1058, 1840 and 1841, Water Code. Reference: Sections 13, 1846 and 5103, Water Code.

History

1. New section filed 3-21-2016 as an emergency; operative 3-21-2016 (Register 2016, No. 13). Pursuant to Water Code section 1841(b), the regulation shall remain in effect until revised by the State Water Resources Control Board.

2. Renumbering of former section 935 to section 939.6 and new section filed 1-21-2026; operative 2-1-2026 pursuant to Government Code section 11343.4(b)(3) (Register 2026, No. 4).