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Environmental Planning Bureau environment Maintenance Division Environment Administration Division
Telephone: 045-671-3507
Telephone: 045-671-3507
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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)
| Clause Eyes Type | Of the use purpose Adaptability | The standard value | Applicable 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 | |||
| AA | The 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 less | 1 mg/l or less | 7.5 mg/l or more | 50MPN/ 100 ml or less | Area of the sea to appoint for each topology of water regions by 2 first (2) |
| A | Water 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 less | 5 mg/l or less | 7.5 mg/l or more | 1,000MPN/ 100 ml or less | |
| B | The 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 less | 15 mg/l or less | 5 mg/l or more | － | |
| C | The water for industrial use second grade Environmental conservation | 6.0 The above 8.5 The following | 8 mg/l or less | Floating such as garbage do not be accepted. | 2 mg/l or more | － | |
| Method for measurement | Method 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 electrode | Method to fix for standard 17 | Method to fix for appended chart 8 | Method 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 electrode | Assay 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
| Clause Eyes Type | Adaptability of the use purpose | The standard value | Applicable area of the sea | |
|---|---|---|---|---|
| All nitrogen | Total phosphorus | |||
| I | Natural environments maintenance And we advocate in column which is lower than II | 0.1 mg/l or less | 0.005 mg/l or less | Area of the sea to appoint for each topology of water regions by 2 first (2) |
| II | Water 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 less | 0.01 mg/l or less | |
| III | The water supply third grade (special thing) And we advocate in column which is lower than IV | 0.4 mg/l or less | 0.03 mg/l or less | |
| IV | Two kinds of fisheries And we advocate in column of V | 0.6 mg/l or less | 0.05 mg/l or less | |
| V | Three kinds of fisheries Water for industrial use Agriculture water Environmental conservation | 1 mg/l or less | 0.1 mg/l or less | |
| Method for measurement | Standard 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. | ||||
(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.
