To get the percent of calcium taken by drinking 1.0 L of the local water, you can use this formula.
Amount of calcium taken / average daily calcium requirement x 100
Drinking 1.0 of the local water would give you 361.68 mg so the percent of calcium you have taken in that day would be:
361.68/1150 x100 = 31.450 % = 31.5% calcium taken
This means that you are below the minimum calcium intake and therefore you should drink more water and/or eat food with significant amount of calcium in it.