Maintenance scheduled for California ISO websites on 8/3/26 postponed

The California ISO has postponed the maintenance scheduled for Aug. 3, 2026, from 5:30 p.m. to 6:30 p.m. A new notification will be issued once the work has been rescheduled.

When rescheduled, data uploads to the following applications and systems will be unavailable during the maintenance window:

Business Practice Manuals (BPM)
Developer Portal
Market Participant Portal (MPP)
Mobile App (ISO Today)
Reliability Coordinator Customer Portal (RC Portal)
Stakeholder Center
Western Energy Market (WEM) Portal

These sites and reports may be temporarily unavailable during the maintenance window. See the most up-to-date ISO Production Maintenance and Outages Schedule for more details.

Contact information

Please contact ISO Change Management at ChangeManagement@caiso.com with any questions.