Updated EDAM Access Charge Rates effective 5/1/26

The California ISO has posted the following updated Extended Day-Ahead Market (EDAM) access charge rates effective as noted below on its settlements webpage, under the Extended Day-Ahead Market (EDAM) access charge rates subheadings. This was updated to fix a manual data error.

These rates will be included in the settlement calculation of EDAM access charge transactions starting on the following trade dates:

Rates effective May 1, 2026:

• May 1, 2026 – T+11M Recalculation Statement
• May 29, 2026 – T+70B Recalculation Statement
• Aug. 17, 2026 – T+9B Initial Statement

Please contact ISO Customer Service at 916-608-7320 with any questions.