Abstract
Environmental Strategy in the stagnant sea has focused on the regulation of total emission in COD, N and P, especially in the wastewater, for 25 years. In spite of significant reduction of COD, flowing to the sea area, the attainment rate for the Environmental Standard has not improved yet, to become almost constant rate. This fact is considered to be caused by non-point source of COD, N and P, such as the internal load from the sediments in the sea, the load from the not regulated industry, agriculture, and fishery field and also the rainfall-caused load from the combined sewer system and so on. We will have the 6thregulation of total emission in COD, N and P. In this paper, present state of water pollution in the stagnant sea area and future problems are discussed, to present a future strategy in the 21stcentury.
