References / Principal Environmental Standards
Appropriate standards for human health protection and preservation of the living environment have been adopted for air, water, soil, and noise pollution. They indicate the regulatory objectives for promoting pollution countermeasures, based on the Basic Environment Law and Law Concerning Special Measures against Dioxins.
Environment Standards for Air Pollution- Environmental Standards for Protection of Human Health from Water Pollution and Standards for Underground Water Pollution
- Environmental Standards for Soil Pollution
- Environmental Standards Related to Noise
■ Environment Standards for Air Pollution
| Substance | Environmental Conditions |
|---|---|
| Sulfur dioxide (SO2) | One-hour mean value for a day should be 0.04 ppm or less, and one-hour value 0.1 ppm or less. |
| Carbon monoxide (CO) | One-hour mean value for a day should be 10 ppm or less,and one-hour mean value for 8 hours 20 ppm or less. |
| Suspended particulate matter(SPM) | One-hour mean value for a day should be 0.10 mg/m3 or less, and one-hour value 0.20 mg/m3 or less. |
| Dioxins | Annual average: 0.6 pg-TEQ/m3 or less. |
| Nitrogen dioxide (NO 2) | One-hour mean value for a day should be within 0.04-0.06 ppm or less. |
| Photochemical oxidants (Ox) | One-hour value should be 0.06 ppm or less. |
| Benzene | Mean value for a year should be 0.003 mg/m3 or less. |
| Trichloroethylene | Mean value for a year should be 0.2 mg/m3 or less. |
| Tetrachloroethylene | Mean value for a year should be 0.2 mg/m3 or less. |
| Dichloromethane | Mean value for a year should be 0.15 mg/m3 or less. |
(Notes)
1. “pg” is abbreviation of picogram, or one trillionth of a gram.
2. TEQ is a dioxin toxic equivalent, calculated by looking at all toxic dioxins and measuring them in terms of the most toxic form of dioxin, 2,3,7,8-Tetrachlorodibenzo-p-dioxin.
1. “pg” is abbreviation of picogram, or one trillionth of a gram.
2. TEQ is a dioxin toxic equivalent, calculated by looking at all toxic dioxins and measuring them in terms of the most toxic form of dioxin, 2,3,7,8-Tetrachlorodibenzo-p-dioxin.
■ Environmental Standards for Protection of Human Health from Water Pollution and Standards for Underground Water Pollution
| Substance |
Reference |
|---|---|
| Cadmium (Cd) | 0.01 mg/l or less |
| Total Cyanogen (CN) | Should not be detected. |
| Lead (Pb) | 0.01 mg/l or less |
| Hexavalent Chromium (Cr (VI)) | 0.05 mg/l or less |
| Arsenic (As) | 0.01 mg/l or less |
| Total Mercury (T-Hg) | 0.0005 mg/l or less |
| Alkyl mercury (A-Hg) | Should not be detected. |
| PCB | Should not be detected. |
| Dichloromethane | 0.02 mg/l or less |
| Carbon Tetrachloride (CBNTET) | 0.002 mg/l or less |
| 1,2-Dichloroethane | 0.004 mg/l or less |
| 1,1-Dichloroethylene | 0.02 mg/l or less |
| Cis-1,2-Dichloroethylene | 0.04 mg/l or less |
| 1,1,1-Trichloroethane | 1 mg/l or less |
| Substance |
Reference |
|---|---|
| 1,1,2-Trichloroethane | 0.006 mg/l or less |
| Trichloroethylene | 0.03 mg/l or less |
| Tetrachloroethylene | 0.01 mg/l or less |
| 1,3-Dichloropropene | 0.002 mg/l or less |
| Thiuram | 0.006 mg/l or less |
| Simazine | 0.003 mg/l or less |
| Thiobencarb | 0.02 mg/l or less |
| Benzene | 0.01 mg/l or less |
| Selenium (Se) | 0.01 mg/l or less |
| Nitrate-nitrogen & nitrite-nitrogen | 10 mg/l or less |
| Fluorine (F) | 0.8 mg/l or less |
| Boron (B) | 1 mg/l or less |
| Dioxins (water quality) | 1 pg-TEQ/l or less |
| Dioxins (sediment) | 150 pg-TEQ/g or less |
■ Environmental Standards for Soil Pollution
| Substance | Environmental Conditions |
|---|---|
| Cadmium (Cd) | As solute : 0.01 mg/l or less, and in farmland :less than 1 mg/kg in rice paddies |
| Total Cyanogen (CN) | As solute: not detected |
| Organic Phosphorus (P) | As solute: not detected |
| Lead (Pb) | As solute: 0.01 mg/l or less |
| Hexavalent Chromium (Cr (VI)) | As solute: 0.05 mg/l or less |
| Arsenic (As) | As solute: 0.01 mg/l or less, and in farmland (limited to paddy fields): less than 15 mg/kg soil |
| Total Mercury (T-Hg) | As solute: 0.0005 mg/l or less |
| Alkyl Mercury (A-Hg) | As solute: not detected |
| PCB | As solute: not detected |
| Copper (Cu) | In farmland (limited to paddy fields):125 mg/kg or less |
| Dichloromethane | As solute: 0.02 mg/l or less |
| Carbon tetrachloride | As solute: 0.002 mg/l or less |
| 1,2-Dichloroethane | As solute: 0.004 mg/l or less |
| 1,1-Dichloroethylene | As solute: 0.02 mg/l or less |
| Cis-1,2-Dichloroethylene | As solute: 0.04 mg/l or less |
| 1,1,1-Trichloroethane | As solute: 1 mg/l or less |
| 1,1,2-Trichloroethane | As solute: 0.006 mg/l or less |
| Trichloroethylene | As solute: 0.03 mg/l or less |
| Tetrachloroethylene | As solute: 0.01 mg/l or less |
| 1,3-Dichloropropene | As solute: 0.002 mg/l or less |
| Thiuram | As solute: 0.006 mg/l or less |
| Simazine | As solute: 0.003 mg/l or less |
| Thiobencarb | As solute: 0.02 mg/l or less |
| Benzene | As solute: 0.01 mg/l or less |
| Selenium (Se) | As solute: 0.01 mg/l or less |
| Fluorine (F) | As solute: 0.8 mg/l or less |
| Boron (B) | As solute: 1 mg/l or less |
| Dioxins | 1,000 pg-TEQ/g or less |
■ Environmental Standards Related to Noise
(Unit: decibel)
| Category of Areas |
Area Affected | Regional Classification | Classification Hours | |
|---|---|---|---|---|
| Daytime (6:00a.m.-10:00p.m.) |
Nighttime (10:00p.m.-6:00a.m.) |
|||
| AA | Areas at 3-1 Matsuyama, 1-17 Takeoka, 3-1 Takeoka, 3-2 Takeoka, 3-3 Takeoka, and 3-10 Takeoka in Kiyose City | 50 or less | 40 or less | |
| A | Class 1 Designated Low-Rise Restricted Residential District, Class 2 Designated Low-Rise Restricted Residential District, Class 1 Designated Mid- and High-Rise Restricted Residential District, Class 2 Designated Midand High-Rise Restricted Residential District Land and water areas adjoining such areas | General area | 55 or less | 45 or less |
| Area facing roads with two or more lanes | 60 or less | 55 or less | ||
| B | Class 1 Residential District, Class2 Residential District, Quasi-Residential District,District without distinct category designation Land and water areas adjoining such areas | General area | 55 or less | 45 or less |
| Area facing roads with two or more lanes | 65 or less | 60 or less | ||
| C | Neighborhood Commercial District,Commercial District, Light-Industrial District,Industrial District Land and water areas adjoining such areas | General area | 60 or less | 50 or less |
| Area facing roads with traffic lanes | 65 or less | 60 or less | ||
(Notes)
1. AA: Areas that particularly require quietness, such as areas where medical and social welfare facilities are concentrated; A: Areas provided exclusively for residential use; B: Areas provided mainly for residential use; C: Commercial and industrial areas of which a considerable number of housing is used.
2. These standards are not applicable to aircraft noise, railway noise, or construction noise.
1. AA: Areas that particularly require quietness, such as areas where medical and social welfare facilities are concentrated; A: Areas provided exclusively for residential use; B: Areas provided mainly for residential use; C: Commercial and industrial areas of which a considerable number of housing is used.
2. These standards are not applicable to aircraft noise, railway noise, or construction noise.
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