> My meter read is 40% higher than the second highest tenant's, and the basement meter read was pretty low.

The numbers shown on the meter aren't really a good way to tell the whole story, and even if you have the historical use its still not a clear case

But, you are right that there's no way you aren't being metered for the dryer (and whatever else is going through your breaker box)... though I wouldn't be surprised if the washer isn't going through another unit and your landlord (or a previous owner or some contractor) just figured this was an easy "solution" on how to split shared utilities. And it might actually be legal. From what I recall (IANAL, btw) things like heating and lighting of common areas has to be covered by the landlord, but I'm not sure that extends to how shared laundry facilities work.

First step is reread your lease and figure out what it says about the laundry and utility costs. You could be setting yourself up to have the laundry removed if the landlord figures thats now the easiest solution. Though maybe they're not an asshole and its an honest mistake they weren't aware of.

also: check out https://www.phillytenant.org/ they probably know the most for people giving out free advise