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2024 Pollution well tracking survey
Last updated on March 12, 2025.
On this page, among the polluted well tracking surveys conducted by the Water and Soil Environment Division in FY2024, Hino 5-chome, Konan-ku, and Izumi-Chuokita 2-chome, Izumi-ku, Izumi-ku (former Izumi-cho), Nakata-Kita 1-chome, Higashimatanocho, Totsuka-ku, Hazawacho, Kanagawa-ku.
| Survey point number | Standard value | 702 | 705 | 720 | 722 | 723 |
|---|---|---|---|---|---|---|
| Prefectural mesh number | No, no | 1486 | 476 | 349 | 1400 | 1400 |
| Name of ward | No, no | Kanagawa Ward | Konan Ward | Totsuka Ward | Izumi Ward | Izumi Ward |
| Name of town | No, no | Hazawa-cho | 5, Hino | Higashimatanocho | 1, Nakatakita | 1, Nakatakita |
| Date of collection | No, no | November 27, 2024 | November 18, 2024 | November 18, 2024 | September 30, 2024 | September 30, 2024 |
| Cadmium (environmental standard items) | 0.003 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| All Cyan (Environmental Standards) | Not detected | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Lead (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Hexavalent chromium (environmental standard items) | 0.02 | Unexamined | Unexamined | <0.01 | Unexamined | Unexamined |
| Arsenic (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Total mercury (environmental standard items) | 0.0005 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| PCB (Environmental Standard Items) | Not detected | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Dichloromethane (Environmental Standards) | 0.02 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Carbon tetrachloride (environmental standard items) | 0.002 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Vinyl chloride monomer (environmental standard items) | 0.002 | 0.0021 | <0.0002 | <0.0002 | <0.0002 | <0.0002 |
| 1,2-dichloroethane (Environmental Standards) | 0.004 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| 1,1-dichloroethylene (environmental standard items) | 0.1 | <0.0002 | 0.0003 | 0.0005 | <0.0002 | <0.0002 |
| 1,2-dichloroethylene (environmental standard items) | 0.04 | 0.0028 | 0.055 | <0.0004 | 0.0033 | 0.0008 |
| 1,1,1-trichloroethane (environmental standard items) | 1 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| 1,1,2-trichloroethane (environmental standard items) | 0.006 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Trichloroethylene (Environmental Standards) | 0.01 | 0.0009 | 0.10 | 0.0046 | 0.0007 | <0.0002 |
| Tetrachloroethylene (environmental standard items) | 0.01 | <0.0002 | 0.19 | 0.011 | 0.16 | 0.024 |
| 1,3-dichloropropene (Environmental Standards) | 0.002 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Chiulum (environmental standard items) | 0.006 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Shimadine (Environmental Standards) | 0.003 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Thiobencarb (Environmental Standards) | 0.02 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Benzene (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Cerene (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Nitrate nitrogen and nitrite nitrogen (environmental standard items) | 10 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Fluorine (Environmental Standards) | 0.8 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Boron (Environmental Standards) | 1 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| 1,4-Dioxane (Environmental Standards) | 0.05 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Chloroform (city-specific) | 0.06 | Unexamined | Unexamined | Unexamined | Unexamined | Unexamined |
| Electric conductivity (mS/m) (General items) | No, no | 105.6 | 65.6 | 17.7 | 30.8 | 52.9 |
| pH (general items) | 5.8 or more 8.6 or less | 7.1 | 8.1 | 7.3 | 6.6 | 6.3 |
| Water temperature (°C) (General items) | No, no | 17.8 | 16 | 16.6 | 24.3 | 22.3 |
| Odor (General items) | No, no | Odorless | Odorless | Odorless | Odorless | Odorless |
| Appearance (General items) | No, no | Pale yellow | Light brown | Colorless and transparent | Colorless and transparent | Colorless and transparent |
| Survey point number | Standard value | 724 | 726 | 729 |
|---|---|---|---|---|
| Prefectural mesh number | No, no | 1400 | 1400 | 1309 |
| Name of ward | No, no | Izumi Ward | Izumi Ward | Izumi Ward |
| Name of town | No, no | 1, Nakatakita | 1, Nakatakita | 2, Izumichuokita |
| Date of collection | No, no | September 30, 2024 | September 30, 2024 | September 30, 2024 |
| Cadmium (environmental standard items) | 0.003 | Unexamined | Unexamined | Unexamined |
| All Cyan (Environmental Standards) | Not detected | Unexamined | Unexamined | Unexamined |
| Lead (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined |
| Hexavalent chromium (environmental standard items) | 0.02 | Unexamined | Unexamined | Unexamined |
| Arsenic (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined |
| Total mercury (environmental standard items) | 0.0005 | Unexamined | Unexamined | Unexamined |
| PCB (Environmental Standard Items) | Not detected | Unexamined | Unexamined | Unexamined |
| Dichloromethane (Environmental Standards) | 0.02 | Unexamined | Unexamined | Unexamined |
| Carbon tetrachloride (environmental standard items) | 0.002 | Unexamined | Unexamined | Unexamined |
| Vinyl chloride monomer (environmental standard items) | 0.002 | <0.0002 | <0.0002 | <0.0002 |
| 1,2-dichloroethane (Environmental Standards) | 0.004 | Unexamined | Unexamined | Unexamined |
| 1,1-dichloroethylene (environmental standard items) | 0.1 | <0.0002 | <0.0002 | <0.0002 |
| 1,2-dichloroethylene (environmental standard items) | 0.04 | 0.0034 | <0.0004 | <0.0004 |
| 1,1,1-trichloroethane (environmental standard items) | 1 | Unexamined | Unexamined | Unexamined |
| 1,1,2-trichloroethane (environmental standard items) | 0.006 | Unexamined | Unexamined | Unexamined |
| Trichloroethylene (Environmental Standards) | 0.01 | 0.0006 | <0.0002 | <0.0002 |
| Tetrachloroethylene (environmental standard items) | 0.01 | 0.08 | 0.042 | 0.034 |
| 1,3-dichloropropene (Environmental Standards) | 0.002 | Unexamined | Unexamined | Unexamined |
| Chiulum (environmental standard items) | 0.006 | Unexamined | Unexamined | Unexamined |
| Shimadine (Environmental Standards) | 0.003 | Unexamined | Unexamined | Unexamined |
| Thiobencarb (Environmental Standards) | 0.02 | Unexamined | Unexamined | Unexamined |
| Benzene (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined |
| Cerene (Environmental Standards) | 0.01 | Unexamined | Unexamined | Unexamined |
| Nitrate nitrogen and nitrite nitrogen (environmental standard items) | 10 | Unexamined | Unexamined | Unexamined |
| Fluorine (Environmental Standards) | 0.8 | Unexamined | Unexamined | Unexamined |
| Boron (Environmental Standards) | 1 | Unexamined | Unexamined | Unexamined |
| 1,4-Dioxane (Environmental Standards) | 0.05 | Unexamined | Unexamined | Unexamined |
| Chloroform (city-specific) | 0.06 | Unexamined | Unexamined | Unexamined |
| Electric conductivity (mS/m) (General items) | No, no | 34.7 | 32.6 | 26.9 |
| pH (general items) | 5.8 or more 8.6 or less | 6.6 | 6.6 | 6.9 |
| Water temperature (°C) (General items) | No, no | 22.7 | 23.8 | 21 |
| Odor (General items) | No, no | Odorless | Odorless | Odorless |
| Appearance (General items) | No, no | Colorless and transparent | Colorless and transparent | Colorless and transparent |
(Concentration unit: mg/L)
- The standard value of pH is tap water quality standard value.
- The standard value of chloroform is the guideline value of items requiring monitoring (outside site)
Inquiries to this page
Water and Soil Environment Division, Green Environment Bureau Environmental Conservation Department, Yokohama City
Phone: 045-671-2494
Phone: 045-671-2494
Fax: 045-671-2809
E-Mail address [email protected]
Page ID: 754-720-074
