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Environmental standard (water pollution: wetlands) about maintenance of living environment

Last update date March 12, 2019

There are wetlands and, in this page, speaks among separate table 2 (environmental standard about maintenance of living environment) of the Environmental Agency notification that determined environmental standard of water pollution based on Environmental Basic Law.

Environmental standard about maintenance of separate table 2 living environment

1 river
(2) Wetlands (nature wetlands and pondage 10 million cubic meters or more artificial lakes)

A
Clause
Eyes
Type
Of the use purpose
Adaptability
The standard valueApplicable area of the sea
Hydrogen-ion concentration
(pH)
Chemical
Oxygen demand
(COD)
Float mass
(SS)
Oxygen content of water
(DO)
The number of the coliform bacteria
AAThe water supply first grade
The fisheries first grade
Natural environments maintenance
And column which is lower than A
We advocate in this
6.5 The above
8.5 The following
1 mg/l or less1 mg/l or less7.5 mg/l or more50MPN/
100 ml or less
Area of the sea to appoint for each topology of water regions by 2 first (2)
AWater supply 2, the third grade
The fisheries second grade
Bath
And column which is lower than B
We advocate in this
6.5 The above
8.5 The following
3 mg/l or less5 mg/l or less7.5 mg/l or more1,000MPN/
100 ml or less
BThe fisheries third grade
The water for industrial use first grade
And column which is lower than C
We advocate in this
6.5 The above
8.5 The following
5 mg/l or less15 mg/l or less5 mg/l or more
CThe water for industrial use second grade
Environmental conservation
6.0 The above
8.5 The following
8 mg/l or lessFloating such as garbage do not be accepted.2 mg/l or more
Method for measurementMethod to fix for standard 12.1 or method to be provided of measurement result at the same level as this by the quality of the water automatic monitoring measurement device using glass electrodeMethod to fix for standard 17Method to fix for appended chart 8Method to fix for standard 32 or method to be provided of measurement result at the same level as this by the quality of the water automatic measurement device using diaphragm electrodeAssay by itokakusuu 
Remarks
About the fisheries first grade, the fisheries second grade and the fisheries third grade, the standard value of item of float mass does not apply for the duration.

(note) 1 natural environments maintenance : Environmental conservation such as natural sight-seeing
2 water supply first grade : We perform simple clean water operation by filtration
Water supply 2, the third grade : We perform normal clean water operation by deposition filtration or high clean water operation with preprocessing
3 fisheries first grade : The one for for fisheries living things of area of the sea of oligotrophic lake type such as kokanee salmons and fisheries living thing of the fisheries second grade and the fisheries third grade
The fisheries second grade : The one for for fisheries living things of area of the sea of oligotrophic lake type such as salmon department fish and sweetfish and fisheries living thing of the fisheries third grade
The fisheries third grade : The one for fisheries living thing such as carp, crucian carp of area of the sea of eutrophic lake type
4 water for industrial use first grade : We perform normal clean water operation by deposition
The water for industrial use second grade : We perform high clean water operation by medicine infusion or special clean water operation
5 environmental conservation : Everyday life (we include strolls of the coast.) of the nation Limit to put in this, and not to produce discomfort

i
Clause
Eyes
Type
Adaptability of the use purposeThe standard valueApplicable area of the sea
All nitrogenTotal phosphorus
INatural environments maintenance
And we advocate in column which is lower than II
0.1 mg/l or less0.005 mg/l or lessArea of the sea to appoint for each topology of water regions by 2 first (2)
IIWater supply 1, 2, the third grade (except special thing)
One kind of fisheries
Bath
And we advocate in column which is lower than III
0.2 mg/l or less0.01 mg/l or less
IIIThe water supply third grade (special thing)
And we advocate in column which is lower than IV
0.4 mg/l or less0.03 mg/l or less
IVTwo kinds of fisheries
And we advocate in column of V
0.6 mg/l or less0.05 mg/l or less
VThree kinds of fisheries
Water for industrial use
Agriculture water
Environmental conservation
1 mg/l or less0.1 mg/l or less
Method for measurementStandard 45.2, 45.3 or
Method to fix for 45.4
Method to fix for standard 46.3 
Remarks

1 standard value assumes the annual mean.
We shall perform designation of 2 topology of water regions about wetlands that might produce remarkable increase of wetlands phytoplankton, and all nitrogen applies the standard value of item of all nitrogen about wetlands causing increase of wetlands phytoplankton.
About 3 agriculture water, the standard value of item of total phosphorus does not apply.

(note) 1 natural environments maintenance : Environmental conservation such as natural sight-seeing
2 water supply first grade : We perform simple clean water operation by filtration
The water supply second grade : We perform normal clean water operation by deposition filtration
The water supply third grade : We perform high clean water operation with preprocessing (with "special thing", we say special thing which we clean water and operate which is available for the removal of odorant.)
One kind of 3 fisheries : For fisheries living things such as salmon department fish and sweetfish and fisheries living thing use of two kinds of fisheries and three kinds of fisheries
Two kinds of fisheries : The one for for fisheries living things such as fresh-water smelt and fisheries living thing of three kinds of fisheries
Three kinds of fisheries : The one for fisheries living things such as carp, crucian carp
4 environmental conservation : Everyday life (we include strolls of the coast.) of the nation Limit to put in this, and not to produce discomfort

※ Environmental standard about river and sea area becomes the other page.

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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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