Estimation of construction water consumption

Our bricklayers let the standpipe for water tapping be stolen. The municipal utilities have now charged us for an estimated consumption of 50m³. In the past months, water was only used for gluing the exterior walls. The bricklayers also partially used collected rainwater. I consider the 50m³ to be a very poor estimate and would personally assume 2-3m³. Do you have any experience with this in any form?

For our prefabricated house in timber frame construction, a total of 1 cubic meter was used, which cost 1 euro. Unfortunately, 90 days rent, so a total of 140 euros... I could have brought the cubic meter there with buckets ^^

What does 50 cubic meters of fresh water cost, which can be proven not to have been discharged into wastewater?

That's really a joke to think about.

Counter question: What does it cost if you stand for an hour in the car park in downtown Munich but have lost your ticket?

I see it the same way. The 50m³ seems exaggerated, but may be covered by the [AGBs] (?) and ultimately it's peanuts not worth the effort. I would be more concerned about the deposit for the standpipe (here the part costs a 1000€ deposit!!).

Our bricklayers let the standpipe for water tapping get stolen.

you let your standpipe get stolen, not the bricklayers. if the bricklayers were responsible for the standpipe and the water supply, you wouldn’t be getting a bill for 50m³ of water now :)

It is about €70, which I am not willing to give away. The amount is worth it to me to deal with the Stadtwerke by phone or letter. I expect the payment of the deposit from the negligent masons/construction company.