Bathing water is newly identified or changes occur that affect classification in the current season. Such bathing water is assessed if the number of samples is sufficient. current season In the preceding season bathing water was newly identified or changes affected classification. Bathing water is assessed if the number of samples is sufficient. current season and preceding bathing seasons Two years ago bathing water was newly identified or changes affected classification. Bathing water is assessed if the number of samples is sufficient. current season and two preceding bathing seasons Assessment for all bathing waters is done on the basis of 4-year data set. If the number of samples, sampling interval and pre-season sample not satisfied, the bathing water gets status insufficiently sampled (Class gets value “5”). For newly identified bathing waters or bathing waters where changes affected classification number of seasons can be lower. current season and three preceding bathing seasons