We have an accidental Delinquent water bill in Petersburg Virginia

So, we moved into our house (rent) about six years ago. We’ve been getting mail this whole time for several people’s names that don’t live here, or no longer do. The bills aren’t in my name but we pay internet and power from my card. We didn’t realize that water was separate I guess and have been living gloriously ignorant, trying to scrape by for our family. Today a notice got put on the door for a delinquent utilities bill for THOUSANDS of dollars , with only a number to call.
I am terrified. What will happen. What do we do? We haven’t had water in our name this wholeeeee time. So.. does it fall on us? How to manage this?
Thoughts ideas and experiences please, no bashing or “what an idiot- you should haves” please. I’m aware. Just need ideas of how to move forward. Thanks.