What is the depth at one atmosphere in fresh water?

At one atmosphere of pressure, which is approximately the pressure at sea level, the depth in fresh water is about 10.3 meters (or 33.9 feet). This is because the pressure increases by about 0.1 MPa (megapascals) for every 10 meters of water depth. Therefore, at 10.3 meters, the pressure from the water column adds an additional atmosphere to the surface pressure.