"CPreksta" wrote in message

My question is: could a leaking hot water heater cause a $300 gas bill?

Sure can. Actually is was probably closer to $230 as others paid $70 and
you would have also.

And if it can is this something I can dispute with the gas company, or
should I with the landlord?

Not the gas company. They supply gas at a price and you consumed what they
well. They did what they are supposed to do.
Landord? Maybe. I don't know the terms of the lease and who would be
responsbile for inspecting the property you are using.