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Total water quality regulation
Total amount regulations under the Water Pollution Control Law
Last update date April 1, 2024
Total amount reduction system
Overview of the total amount reduction system
- In closed water areas such as Tokyo Bay, the pollution load will be significantly higher due to the concentration of population and industry. Therefore, the Water Pollution Control Law sets a total amount regulation in addition to the concentration regulation (Article 4-2 of the Act).
- Specifically, Tokyo Bay is designated as a designated water area, and in order to ensure chemical oxygen demand (COD), nitrogen, and phosphorus water quality environmental standards, the total amount of pollution load flowing into Tokyo Bay is planned and stepwise. It is a system to try.
- It was introduced in 1978 as a result of the revision of the Water Pollution Control Law, and now it is the ninth.
9th total reduction
- On January 24, 2022, the Ministry of the Environment (MOE)Basic policy for reducing total volume related to chemical oxygen demand, nitrogen content and phosphorus content (external site)(Tokyo Bay) We have formulated it.
- On November 4, 2022, Kanagawa PrefectureThe ninth total reduction plan for chemical oxygen demand, etc. in Tokyo Bay (outside site)We have formulated it.
Those subject to total volume regulation
Among specific business establishments that connect to Tokyo Bay or Tokyo Bay and drains into public water bodies that flow in, the average daily water discharge is 50 cubic meters or more
Details of the notification
Those who are subject to the total amount regulation need to submit the following notification.
| Details of notification | Notification requirements |
|---|---|
| Pollution load measurement method registration form | In the following cases, we will notify you in advance.
|
| registration form of pollution status and amount of discharged water by drainage system | If the location becomes a new designated area, notify us within 60 days. |
Please refer to the report page for notification.
Measurement, recording, and reporting of pollution load
Measurement and recording of pollution load
- The pollution load of the specified effluent must be measured at the prescribed measurement method and frequency, and the results must be stored for three years. (Article 14, Paragraph 2 of the Act)
- Specified effluent refers to water used for business activities and other human activities at a specific business site among the effluents, and is used exclusively for cooling, decompression, or other uses. Means other than water provided for those that do not increase.
- The measurement of the pollution load is measured by measuring the COD, nitrogen content, phosphorus content concentration, and specific discharged water volume of the specified effluent, and calculates the pollution load per day of the specified effluent.
| Pollution load | Calculation formula |
|---|---|
| Measured values (kg/day) | Specified discharge water volume (m3/day) x concentration (mg/L) / 1,000 |
| Standard value (kg/day) | Maximum notification of specified discharge water volume (m3/day) x standard concentration (mg/L) / 1,000 |
The standard concentration varies depending on the type of business and the time of installation.
For details, please check the website (outside site) of Kanagawa.
Please refer to the website of the Ministry of the Environment for details on the measurement method.
- The number of measurements depends on the average daily amount of water discharged.
| Average daily amount of water discharged | Number of measurements |
|---|---|
| 400 cubic meters or more | Every day |
| 200 cubic meters or more and less than 400 cubic meters | At least once every 7 days |
| 100 cubic meters or more and less than 200 cubic meters | At least once every 14 days |
| 50 cubic meters or more and less than 100 cubic meters | At least once every 30 days |
Report on pollution load measurement results
Please understand the measurement status and the pollution load, and report on the results of measurement of the pollution load, etc., for the purpose of contributing to environmental conservation in Tokyo Bay.
| Average daily amount of water discharged | Reporting frequency |
|---|---|
| 1,000 cubic meters or more | Every month |
| 400 cubic meters or more and less than 1,000 cubic meters | Every 2 months |
| 50 cubic meters or more and less than 400 cubic meters | Every 6 months |
- Report form:Excel (Excel: 32KB)(Please submit it in Excel in principle.)
- Submission method: E-mail (Electronic application (outside site)It is also possible to submit it in writing.
- Submission: Green Environment Bureau Water and Soil Environment Division Water Quality
- Email address: mk-mizu@city.yokohama.lg.jp
Review of correlations for automatic measuring instruments, management standards and failure status report
- Report on a review of the correlation of UV meters, etc. in COD measurement (Number of samples used for the conversion formula: 20 samples or more).
- Report on management standards for automatic total nitrogen total phosphorus automatic measuring instruments
- Failure status report of automatic measuring instrument
- Reporting frequency: Every 6 months
- Reference Form:Excel (Excel: 18KB)
- attached documents: Correlation coefficients and conversion formulas, data on management standards, and other necessary materials
- Submission method: E-mail (Electronic application (outside site)It is also possible to submit it in writing.
- Submission: Green Environment Bureau Water and Soil Environment Division Water Quality
- Email address: mk-mizu@city.yokohama.lg.jp
For inquiries to this page
Green Environment Bureau Environmental Conservation Department Water and Soil Environment Division
Phone: 045-671-2489
Phone: 045-671-2489
Fax: 045-671-2809
Email address: mk-mizu@city.yokohama.lg.jp
Page ID: 437-322-529
