Upper drainage standard - Upper drainage standard

Japanese: 上乗せ排水基準 - うわのせはいすいきじゅん

...This law is for implementing the necessary regulations to prevent water pollution. It was promulgated in 1970. The predecessors of this law were the Law Concerning the Preservation of Water Quality in Public Water Areas (Water Quality Preservation Law) and the Law Concerning the Regulation of Factory Wastewater, etc. (Factory Wastewater Regulation Law), which were promulgated in December 1958. These are called the Old Two Water Quality Laws in contrast to the Water Pollution Prevention Law. The impetus for the legalization of water pollution prevention was the Urayasu Incident, in which pulp wastewater discharged from the Honshu Paper Edogawa Factory polluted downstream fishing grounds, and fishermen from Urayasu protested against this by storming into the factory on June 10, 1958, and clashing with the waiting police force. ...

From [Emission Standards]

…Harmful substances are regulated regardless of the amount of wastewater discharged, while living environment substances are regulated for amounts of 50 tons or more per day. As with air pollution, prefectures can set additional wastewater standards. However, because wastewater standards are concentration regulations that regulate the concentration of pollutants, it is possible to discharge large amounts of harmful substances by diluting them, which is problematic. …

*Some of the terminology used in reference to "additional drainage standards" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…水質汚濁を防止するために必要な規制を行うための法律である。1970年公布。この法律の前身は，1958年12月に公布された，〈公共用水域の水質の保全に関する法律〉(水質保全法)と〈工場排水等の規制に関する法律〉(工場排水規制法)である。これらは水質汚濁防止法に対して，旧水質二法と呼ばれる。水質汚濁防止の法制度化が進められることになった契機は，本州製紙江戸川工場から放出されたパルプ廃液が下流の漁場を汚染し，それに抗議する浦安漁民が1958年6月10日に本州製紙江戸川工場に突入し，待機していた警官隊と衝突した浦安事件であった。…