The Colorado Privacy Act defines personal data rather vaguely. It is data that can "REASONABLY BE USED TO INFER INFORMATION ABOUT, OR OTHERWISE BE LINKED TO, AN IDENTIFIED OR IDENTIFIABLE INDIVIDUAL, OR A DEVICE LINKED TO SUCH AN INDIVIDUAL"
It almost seems as if any piece of information, or combination of information, that can be used to link an individual to a real-life identity constitutes personal data under the Act.
For example, if a published dataset of customers reveals that one of them lives in Grand Junction and has 172 great-grandchildren, and there is only one person in Grand Junction that has that many great-grandchildren, that information might be personal data.