Skyrocketing Water Bill

Our recent water bills have been ridiculous. They've increased about 300% I think. And I don't know what we've done differently, to be honest. They are just ridiculously high. We're trying to be more conscientious with water usage but a household of 8 will use up a lot of gallons per day right?

I hope there isn't a leak somewhere that we do not know of. I know that all of our faucets are working fine. In fact, our Kohler kitchen faucets are barely a year old. Could someone have tapped our water line? I highly doubt it. Can it happen here, you think?

Whatever the reason for the jump in our water bill, I hope we find a way to get it back down pronto!