Try a bill of £118,000 for a year in an office that housed 12 folk, no showers etc, just hand washing and a kettle!
Turned out there was a leak at the meter going straight into a nearby storm drain – luckily it was there or the circa 20M litres of water could have undermined the whole building!
That’s wasn’t what annoyed me, what annoyed me was that after following the official dispute process, winning and having a formulae applied to the bill, we still owed them over £5k.
Anyways, £1 a day (ish) seems reasonable? Mine is £400/year onto the council tax.