What is the density of water at 22*C?
The density of water at 22.0 degree Celsius is 0.997770 g/mL.
According to the Handbook of Chemistry and Physics, 53rd Edition, p. F4. This information can be obtained from this table if you know the temperature to the tenths place. This source is correct, I have the same edition and double checked it.
There are cases where this specific value can be important to have. In general, most people round the density of water to 1.00g/mL.
Water is the most dense at 4 degrees Celsius. It's density at this temperature is 1.000000g/mL.