Wellstar - Public Resources

Well Statewide Tracking and Reporting System (WellSTAR) is the California Geologic Energy Management Division’s (CalGEM) electronic database.​

WellSTAR furthers CalGEM’s commitment to public safety and environmental protection by providing transparency, ease of use, and access to important, sortable data in a single portal. The release of WellSTAR ensures compliance with CalGEM’s Well Stimulation Treatment and Well Maintenance regulations, as well as other state and federal requirements.​

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Public Acces​s Link to WellSTAR

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​​The link above serves members of the public who are not representing a formal organization. If you are representing or wish to represent a formal organization, instructions are available on the WellSTAR–  Operators page​.​


Looking For Well Maps And Geographic Perspective?​  You might prefer our Well Finder Map T​ool. Well Finder interfaces with the WellSTAR database and is updated nightly. ​ ​​​​​​​


​​Construction Site Well Review (CSWR)​

​To submit a CSWR form via email, download the form here, fill it out, and email it to your local district. Information on the districts is available on the ConstructionSite Plan Review Program page. Answers to common questions are available on the ConstructionSite Plan FAQs page​


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Additional CalGEM Resources​

CalGEM Mapping Tools​​

  • Well Finder: ​​​ CalGEM's online mapping application ​to find and locate oil and gas wells and other types of related facilities throughout the state​.  Search by address, latitude/longitude, unique well number (also known as “API”), Public Land Survey System (PLSS) township/range/section, or by oil and gas field names.​​

  • GIS Mapping: Geographical Information System (GIS) mapping uses spatial (geographical) data to create information-rich maps that benefit understanding, analysis, and decision-making. A GIS system allows multiple categories of data to be selected for representation on a map.​​

Guides & FAQs

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  • CalGEM FAQs: Frequently Asked Questions about numerous CalGEM processes and 
  • Reference Guide​: Accessing Public Records via CalGEM Online Data


Permits/Reports/Forms/Files



CalGEM Resources