While total renovation of embankments are being carried out on Japanese expressways for the purpose of disaster prevention and mitigation, there is a problem in easily grasping and evaluating the water levels of the enormous number of embankments. So, we propose a new idea of water level assessment called “water level condition” and analyze water level observation data collected at expressway embankments nationwide using this method. As a result, we perceive some tendency in the conditions of embankments where the water level tends to be high. Moreover, we suggest an evaluation division of embankment water levels to systematically advance total renovations by organizing the levels, applying the water level condition method.