Total Emission Control System of water quality was provided in 1978. The objective of this system is to control the pollution loading amount flowing in wide and closed water area and to keep it under the constant level required for environmental improvement. Without this system, the load will be surely increasing. On the basic policy of Government in 1979, the pollution loading amount in terms of COD in Inland Sea of Seto, Ise Bay and Tokyo Bay will decrease by 1984 below the level of 92.6%, 90.8% and 91.4% of the present amount. This system will be applied to such plants exhausting waste water beyond 50 m3 per day as a sewerage treatment plant, a community plant, a milk plant, a natural science college and institute.
