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Geothermal exploratory reforms advance after debate over 0.5-mile buffer safeguards

Senate Environmental Quality Committee · June 24, 2026

Summary

AB 22-34 would modernize the definition of geothermal exploratory projects to include enhanced geothermal techniques and allow exceptions to the 0.5-mile buffer with consent; existing geothermal operators asked for guardrails to protect reservoirs and production.

Assemblymember Pappan presented AB 22-34 to update the statutory definition of geothermal exploratory projects to include equipment and techniques used for enhanced geothermal systems (EGS) and to clarify the 0.5-mile buffer rule where appropriate. Sponsors from Sonoma Clean Power and The Nature Conservancy supported expanding exploration opportunities to unlock more baseload renewable energy, citing potential contributions to the state's clean-energy mix.

Representatives of existing geothermal operators and municipal utilities (NCPA, CMUA) expressed concern that drilling within 0.5 miles of existing facilities could alter reservoir pressure and production and asked for requirements that developers demonstrate no harm, obtain consent from affected owners/operators, and provide financial accountability for any impacts. The author noted amended language requiring consent of neighboring wells and indicated willingness to continue discussions; the committee ordered the bill to Natural Resources and Water.

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