How do I calculate my monthly water usage?
1 cubic meter is 1,000 liters of water.
1,000 liters is about 264 gallons.
You are allotted 10 cubic meters or 2,640 gallons, which is quite a lot. 

The Average American Shower is about 17 gallons. 4 showers per day times 31 days is 2,108 gallons of water. Your worst case scenario for Washing Machine Water Usage is about 25 gallons, at 6 times per month that would be 150 gallons. Also, consider that a toilet flush is about 2 gallons. If you flush twice per day that's another 125 gallons of water. You can figure about that much for typical hand washing, etc. At this point you are at about 2,500 gallons (9,463 liters). That's roughly about what you are allowed to use.


Do you have a separate water meter? If so, record the reading. Take another reading the next month and get the difference, multiply by what the meter calls for to determine your usage.
Turn all of the water off in your apartment and go see if the meter is spinning. If so, you have a leak somewhere.
Check to make sure the toilet flapper is not allowing water to run after you flush. This will make the toilet keep trying to fill.
Do you have any water dripping at faucets or underneath the sinks?
Check your dishwasher settings.
Change the aerators in your shower and sinks.


Anything you can do to reduce your water consumption will ultimately lower your bill.