Contact Us

Impact 100 East Bay
P.O. BOX 2889
Castro Valley, CA 94546

For information about becoming a member, general information, or to share ideas and suggestions:


Impact 100 East Bay is incorporated in the State of California. As a 501(c) (3) organization, we are classified as a public charity and contributions are deductible under section 170 of the internal Revenue Code. Impact 100 East Bay is also qualified to receive tax deductible bequests. Our tax id number (Employer Identification Number) is 81-3431763.

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