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Survey of dioxins in soil (FY2007)

Last update date December 12, 2023

This page is a document describing the results of the survey on dioxin concentrations in soil conducted in 2007 (2007).

Purpose of the survey

Yokohama City has been conducting surveys on dioxins in soil since 1998, but in 2007, the entire city was divided into 10 districts, selected one point from each district and conducted a survey. We will inform you that the survey results have been compiled.

Survey points and methods

The survey points were selected for parks with bare land of a certain area suitable for sampling, and were collected and analyzed in accordance with the "Soil Survey and Measure Manual for Dioxins (Environment Agency: January 2000)" .

Date of investigation

From January 24, 2008 to February 15, 2008

Survey results

  1. The concentration of dioxins in soil at 10 locations in the city ranged from a minimum of 0.0016 pg-TEQ / g to a maximum of 65 pg-TEQ / g, and the average was 8.2 pg-TEQ / g. The results of this survey met the environmental standard of 1,000 pg-TEQ / g for soil at all locations.
  2. Survey of dioxins in soil
Survey of dioxins in soil
Location numberSurvey pointLocation

Dioxin concentration
(Unit: pg-TEQ/g)

Daikoku Futo Central Green Space1, Daikokufutou, Tsurumi-ku10
Shirohata Elementary School11-1, Shirahatakamicho, Kanagawa-ku0.20
Yokohama Port Symbol Tower1-16, Honmokufutou, Naka-ku5.8
Kotsubo Elementary School4-11-1, Kounandai, Kounan-ku0.0016
Nakazawa Elementary School3-25-1, Nakazawa, Asahi-ku0.67
Rest green space 1-C1-12, Fukuura, Kanazawa-ku65
Kamoi Elementary School4-7-15, Kamoi, Midori-ku0.0035
Ichigao Elementary School1632-1, Ichigaocho, Aoba-ku0.0034
Shimogo Elementary SchoolTotsuka Ward 2447-20.0029
10Izumino Elementary School6211, Izumicho, Izumi-ku0.31

※Environmental standards for soil contamination: 1,000 pg-TEQ/g or less

Future Actions

From fiscal 2008 onwards, similar general environmental surveys will be conducted as necessary.

For inquiries to this page

City of Yokohama, Environmental Planning Bureau Environmental Conservation Department Water and Soil Environment Division

Phone: 045-671-2494

Phone: 045-671-2494

Fax: 045-671-2809

Email address: ks-dojo@city.yokohama.jp

Return to the previous page

Page ID: 611-389-513

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