If data is missing for a particular County or Location Type, that means there weren't enough visits for that Location Type in that County to have usable data.
If you are a crisis response team who needs help working with this data — please contact support@visitdata.org. VisitData.org needs volunteer programmers, data analysts, and crisis team liaisons — please contact volunteers@visitdata.org or visit https://github.com/VisitData-org/ca_visit_tracking.