Well, Google does a lot more than Web... so, it's hard to tell what you are seeing in those datacenters. It could be that specifically next to where you live is a GCP datacenter or whatever other division in Google that has nothing to do with Web (Google has its fingers in cyber-security, television, maps, cellular phones, general electronics, ML and much, much more...)
So, measuring their power consumption isn't going to indicate anything unless you know what exactly does that datacenter support.
Facebook. Its estimated at 22 million sqft.