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Environmental standard (public waters) to affect water pollution

Last update date August 23, 2018

In this page, we speak the Environmental Agency notification that determined environmental standard of water pollution based on Environmental Basic Law.
In environmental standard about water pollution of public waters (river, the sea, lake), there are two of "environmental standard about protection of a person's health" and "environmental standard about maintenance of living environment".
We are divided for each river, wetlands, sea area, and, about "environmental standard about maintenance of living environment", environmental standard is set.
In addition, environmental standard about water pollution of groundwater becomes another page.

December 28, 1971 Environmental Agency notification No. 59
Revised November 17, 2014 Ministry of the Environment notification No. 126

We notify environmental standard to affect water pollution based on regulations of Environmental Pollution Prevention Act (1967 law No. 132) Article 9 as follows.
Protect a person's health about condition on environment affecting water pollution of public waters by Environmental Basic Law (1993 law No. 91) Article 16; and living environment (say thing to prescribe in law Article 2 Paragraph 3. The same thing that we maintain in keeping) in good condition does desirable standard (we say "environmental standard" as follows.) as follows as follows.

The first environmental standard
We do environmental standard to affect water pollution of public waters about protection of a person's health and maintenance of living environment as follows each.

Environmental standard about protection of health of one
We do environmental standard about protection of a person's health with just what to raise in column of the standard value of the table item by item to advocate in column of item of separate table 1 in all public waters.

Environmental standard about maintenance of 2 living environment
(1) We do environmental standard about maintenance of living environment with just what to raise in column of the standard value of the table for each topology of water regions that the public waters concerned corresponds to in topology of water regions to advocate in column of topology of water regions of separate table 2 in each public waters.
(2) Matter to raise next stop by on appointing topology of water regions.
Oh, pollution to affect water pollution becomes remarkable or give priority to area of the sea that might become remarkable.
Consider about change of the current use purpose of i area of the sea concerned and the future use purpose.
Take the situation of water pollution in cormorant area of the sea concerned, the location situation of water pollution source into consideration.
Oh, consider not to allow the quality of the water of the area of the sea concerned to turn worse at least than the current situation.
You note connection with measure for o accomplishment, and set the achievement period.
Public waters (we say "prefectural verge area of the sea" as follows.) which belongs to area of the metropolis and districts with area of the sea targeted for mosquito 2 or more When it is some area of the sea, perform designation of topology of water regions of this about the prefectural verge area of the sea concerned on day when, as a general rule, is the same as designation of topology of water regions that prefectural governors concerned perform.

Method for measurement of the quality of the water of the second public waters
When we measure the quality of the water of public waters to investigate the achievement situation of environmental standard, we decide to note the next matter.
(1) Method for measurement assumes just what to advocate in column of method for measurement of separate table 1 and separate table 2.
In this case, it shall depend on method that it is thought that it is the most suitable while considering connection with irrigation purpose of area of the sea about the choice of position of measurement point, collection of sample and operation.
(2) When public waters is under the normal state (we shall say cases that there is to water level that low water is or more when there is flow rate low quantity of water or more when it is in river when there is in wetlands.) at any time about relations item of environmental standard about maintenance of living environment without asking state of things of quantity of water of public waters, conduct of the measurement decides to perform appropriately each about item of environmental standard about protection of a person's health concerned.
(3) When we determine whether the situation of water pollution of area of the sea adapts to environmental standard based on result of a measurement, in consideration of characteristic of area of the sea, we shall take result of a measurement of 2-3 spots into consideration generally.

The achievement periods of the third environmental standard
We do measures when period necessary for the achievement of environmental standard and this period are long terms as follows.

Environmental standard about protection of health of one
About this, we are accomplished after the setting promptly and shall try to be maintained.

Environmental standard about maintenance of 2 living environment
We shall plan the achievement maintenance in kaoyobimatosoku while being almost combined with promotion of measure by the next division for each public waters about this.
(1) In fact, we do what we achieve about remarkable population concentration, thing which water pollution that is remarkable at area of the sea modifying area that large-scale industrial development moves occurs or occurring thing for less than five years with aim.
But we decide to expect the prompt achievement of environmental standard as much as possible while planning improvement of the quality of the water of the area of the sea progressively concerned by the achievement in this period setting improvement target value that is temporary for the time being about area of the sea thought to be difficulties appropriately even if we take measure for improvement of the quality of the water generally in these area of the sea as water pollution is extremely remarkable.
(2) About area of the sea except area of the sea of (1), we are accomplished after the setting promptly and, among public waters needing to plan prevention of water pollution, decide to act for prevention of water pollution so that we are maintained.

Review of the fourth environmental standard
It is decided that 1 environmental standard revises by next appropriately.
(1) Change of the standard value accompanied with improvement of scientific judgment and addition of item becoming condition on environment
(2) Addition of item becoming condition on environment accompanied with changes such as the situation of water pollution, circumstances of water pollution source
(3) Change during the achievement period of environmental standard to modify pertinence area of the sea of each topology of water regions accompanied with change of circumstances such as state-like changes of the use of area of the sea and the topology of water regions concerned
We shall perform revision of environmental standard to affect (3) of 2 1 according to the first 2 (2).

Environmental standard about protection of health of one separate table

Environmental standard about maintenance of separate table 2 living environment

1 river

(1) River (wetlands are excluded.)
(2) Wetlands (nature wetlands and artificial lake where it is pondage 10 million cubic meters or more and stay time of water is four days or more)

2 Sea area

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Environmental Planning Bureau environment Maintenance Division Environment Administration Division

Telephone: 045-671-3507

Telephone: 045-671-3507

Fax: 045-641-3580

E-Mail address [email protected]

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