To update the email address on an existing CDX account follow the below instructions.
Step 1. Log in to https://cdx.epa.gov
Step 2. Go to the My Profile tab
Step 3. Click Modify Organization Information
Step 4. In CDX email addresses are associated with organizations, click on the name of the organization for which you would like to update email address.
Step 5. Enter the updated Email address and click Save Organization Details
Step 6. An email confirmation message will be sent to your new inbox, to complete the change, click on the link in this email.