The Delaware River’s water levels have reached 60% in the face of an advancing salt front. The salt front is a boundary between fresh and salt water in the river, and its movement upstream is driven by the tide and freshwater inflows. The current water level is significantly below the average for this time of year, and the salt front has already reached Trenton, New Jersey, impacting water quality and affecting ecosystems. Experts are monitoring the situation and urging caution for those using the river for recreation or relying on it for drinking water.