CalGEM Request for Information on Acid Treatment Data Reporting


The Department of Conservation, California Geologic Energy Management (CalGEM) is seeking stakeholder input on opportunities to strengthen regulations related to acid treatment data reporting. Information gathered from this Request for Information (RFI), will guide future actions, which may include building upon the existing regulatory framework for well maintenance to address issues identified by CalGEM and other key stakeholders related to acid treatment reporting. 

Effective January 1, 2022, Senate Bill 406 (Stern, Chapter 727, Statutes of 2021) amended Public Resources Code section 3213, modifying the existing requirement for a well history to include reporting of acid treatment data. The statute now requires a well history to include all acid treatment data of any amount. This amendment provides the opportunity for CalGEM to explore strengthening the acid treatment data reporting regulations and identify any issues that may need to be addressed.  

Current regulations require operators to report to CalGEM within 60 days of completing an operation on a well that involves the placement of any fluid containing acid. The operators have two options for reporting. The default option requires the operator to report the treatment of each individual well within 60 days of each operation. The second option allows the operator to request annual submission of acid treatment data under an approved aggregated plan for repeat acid treatments, provided that the acid treatments clearly do not meet the definition of well stimulation treatment. The data for an approved aggregate plan are submitted annually by the operator at the end of the calendar year. ​

​Important Dates

​​​​​​Submission of Written Comments

Written submissions can be provided through August 31, 2022, by email at: or by mail at Department of Conservation, Attn: Acid Treatment Disclosure RFI 

715 P Street, MS 1907, Sacramento, CA 95814 

Written comments received during the comment period will be reviewed and considered to inform the potential modification of requirements related to acid treatment data reporting. ​

​​​​​Contact Information

If you have any questions regarding the process for this public comment period, please contact the Office of Legislative and Regulatory Affairs, at (916) 322-3080, or by email at