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

Last update date March 12, 2019

There is river 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
(1) River (wetlands are excluded.)

Type
Clause
Eyes
Type
Of the use purpose
Adaptability
The standard valueApplicable area of the sea
Hydrogen ion
Density
(pH)
Biologic
Oxygen demand
(BOD)
Float mass
(SS)
Oxygen content of water
(DO)
The number of the coliform bacteria
AAThe water supply 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 less25 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)
AThe water supply second grade
The fisheries first grade
Bath
And column which is lower than B
We advocate in this
6.5 The above
8.5 The following
2 mg/l or less25 mg/l or less7.5 mg/l or more1,000MPN/
100 ml or less
BThe water supply third grade
The fisheries second grade
And column which is lower than C
We advocate in this
6.5 The above
8.5 The following
3 mg/l or less25 mg/l or less5 mg/l or more5,000MPN/
100 ml or less
CThe fisheries third grade
The water for industrial use first grade
And column which is lower than D
We advocate in this
6.5 The above
8.5 The following
5 mg/l or less50 mg/l or less5 mg/l or more
DThe water for industrial use second grade
Agriculture water
And it is kei in column of E
gerumono
6.0 The above
8.5 The following
8 mg/l or less100 mg/l or less2 mg/l or more
EThe water for industrial use third grade
Environmental conservation
6.0 The above
8.5 The following
10 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 21Method 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
1 standard value assumes the days mean (wetlands, sea area follow this, too.) .
About irrigation point for 2 agriculture, is 7.5 or less more than hydrogen ion concentration 6.0, more than 5 mg/l of oxygen content of water (wetlands follow this, too.) .
3 quality of the water automatic monitoring measurement device is device which we can measure automatically about the item concerned and says thing having function to record measurement result automatically or thing connected to apparatus having the function (wetlands sea area follows this.) .
Assay by 4 itokakusuu is next (wetlands, sea area follow this, too.) .
10 ml of samples, 1 ml, 0.1 ml, 0.01 ml,………By five have i* of consecutive four phases (when quantities of sample are 0.1 ml or less, we use for 1 ml in diluted form.) to BGLB fermentation pipe like this and culture 35-37 degrees Celsius, 48±3 time.
We assume thing which accepted gasification coliform bacterium-positive pipe and demand the number of the positive pipes in quantity of each sample and calculate 100 ml of itokakusuu now using itokakusuuhyo.
At this chance all or the majority of thing that i* did the most small quantity again use sample in diluted form properly so that all or the majority of thing which i* made the maximum amount become coliform bacterium-positive as coliform bacterium-negative.
In addition, we refrigerate and examine within several hours when we cannot examine promptly after sampling.

(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
3 fisheries first grade : The one for for a kind of trout, fisheries living things of poverty dirty water-related area of the sea such as chars 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 poverty dirty water-related area of the sea such as salmon department fish and sweetfish and fisheries living thing of the fisheries third grade
The fisheries third grade : Carp, crucian carp are for fisheries living thing of dirty water-related area of the sea in β-
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
The water for industrial use third grade : We perform 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

※ Environmental standard about wetlands 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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