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Our Mailing Address
California ISO
P.O. Box 639014
Folsom, CA 95630
Folsom campus
250 Outcropping Way, 95630
Main telephone number: (916) 351-4400
Security telephone number: (916) 351-2303

Contact us

Please contact the department below that can best address your inquiry during our business hours: Monday through Friday from 7:30 a.m. to 5 p.m. PST. For questions regarding residential electric service, including outages, please contact your electric utility provider using the contact information on your electric bill.



Customer Service
(916) 608-7320 

Human Resources
(916) 608-7000

Media contact

Employment verification

Tours & Speaker requests
Visit our web page for details


Flex Alert
Visit for energy saving tips,
what to do before and during a Flex Alert
and to subscribe to Flex Alert notifications.
Update your Flex Alert subscription.

System access or technical issues
(916) 351-2309 or (888) 889-0450

Service Desk for RC West participants only
Local number: (916) 538-5722
Toll-free number: (833) 888-9378

Use the form below to submit an inquiry, include specific details.

A customer service specialist will respond to your inquiry.  

Help us better serve you, please review our Knowledge Base for quick answers to many commonly asked questions. For questions related to OASIS, see our OASIS Frequently Asked Questions.

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