Radiation Control Headquarters

Following the accident at the Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Station accident in March 2011, the city measured spatial radiation dose at approximately 4,300 facilities under the jurisdiction of the city during FY2011.
As a result, we have confirmed that there is no regional bias or problematic values in the space where we usually live.
In addition, about space radiation dose in Yokohama, we announce measurement result of radiation monitoring post (outside site) (measured every hour in a 24-hour system) installed in municipal ownership land of Hodogaya Ward Buddha at any time I am.

Please refer to the relevant information page for information on countries and research institutes.

It is expressed as "measurement location (measurement height)".

• Garden of a licensed nursery school(Surface 0.5m)
• Schoolyard of Yokohama City School
  Elementary school (0.5m on the ground surface) and junior high school (1m above the ground surface)
• Park(Surface 0.5m)
• Radiation monitoring post (outside site)
  Hodogaya Ward (1m above the ground surface)
• River facilities (such as hydrophilic bases)(Surface 0.5m and 1m)
• Roads around the facility(Surface 0.5m and 1m)
• Water treatment plant(Surface 0.5 to 1m)

• About microspots
  Finding hot spots in private homes and guidelines for countermeasures against local contaminated areas are also included.
• Appropriate treatment of removed soil

• Nursery schools
• Park
• Incineration plants, collection offices, etc. (PDF: 195KB)
• Ward Office, public hall
• Other facilities
  • Hygiene Research Institute (PDF: 10KB)(measured in 2012)

• Measurement results of radioactive materials in tap water and tap water

• Information on radioactive substances in food
• Measurement of Radioactive Materials in school lunch Foods
  • Elementary school school lunch
  • Nursery school school lunch

• Marine Park Beach (measurement results in FY2012)
  • About space radiation dose measurement of sandy beach (PDF) (PDF: 142KB)
• About the situation of radiation dose measurement in Yokohama Port
• Sewage sludge, etc.
  • Measurement results of radioactive material concentrations in inflow sewage, effluent, dewatered sludge, and sludge incineration ash
• Compost, etc.
  • Measurement status of radioactive cesium concentration and spatial radiation dose at Yokohama Animal Forest Park Green Recycling Plant
• Soil, sand dust and sediments (FY2011)
  • Inspection result (press release document) of soil, sand dust, sediment of place where radiation dose of higher value than the surrounding area was detected (press release document) (PDF: 303KB)
  • About measurement result of radiation dose in municipal nursery school and municipal school in Kohoku Ward with place where radiation dose of higher value than the surrounding area was measured around road gutter in Kohoku Ward (press release document) (PDF: 159KB)

• Appropriate treatment of removed soil generated by microspot support, etc.
• About designated waste
• Yokohama City Radiation Control Record (2011/24)
• About lending of radiation dose measurement equipment
• About the place where radiation dose higher than the surrounding area was measured (so-called microspots)
• To the manager of rainwater use equipment (news) (PDF: 135KB)
• To the managers of private rainwater regulating ponds (about radiation dose measurement before work)
• About radiation dose measurement before work such as cleaning of retarding basin
• Handling of household air purifier dust collect filters
• About radioactive material of special use forest products (mushroom, wild plants, firewood, charcoal, pellets, etc.) (outside site)(Forestry Research Institute website)

• Yokohama City Radiation Contact List
• Information (air, tap water, food, etc.) such as radioactivity in Kanagawa Prefecture (outside site)(Kanagawa Prefectural Website)