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Result of a measurement of tap water and radioactive material of water supply Haramizu

 We announce test result of tap water in water purification plant in the city and radioactive material of water supply Haramizu (water before cleaning water, and handling).                                                                                                                                                        We collect water, and water supply Haramizu inspects water of water landing well of each water purification plant again, and tap water announces water of distributing reservoir exit of each water purification plant.

 
 From April 1, 2012, the standard value of Ministry of Health, Labour and Welfare notification was reviewed, and new target value "10 becquerels/kg" was set about radioactive cesium in tap water. We introduce germanium semiconductor detector in City of Yokohama, Water Works Bureau from June 1, 2012 and inspect radioactive material precisely.

 In addition, we did inspection frequency more than once a month based on Ministry of Health, Labour and Welfare notice from January, 2014 because we were able to collect enough information about the tendency about tap water and radioactive cesium of water supply Haramizu because all the result of a measurement of conventional radioactive cesium was the non-detection. (The details to this


 ※In addition, as for the result of a measurement of radioactive material in water purification plant of wide area Channel company group in Kanagawa supplying tap water to Yokohama-shi, please see homepage of wide area Channel company corps in Kanagawa from the following related link.

Test result (measurement frequency once a month) of tap water and radioactive material of water supply Haramizu

                                                (unit: becquerel /kg)

                          

The water intake date and time

Measurement sample

Cs (cesium) 134

Cs (cesium) 137

June 20
9:00

Kawai water purification plant 

Tap water 

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.7) 

 Water supply Haramizu

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.6) 

Nishiya water purification plant 

Tap water 

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.4) 

 Water supply Haramizu

The non-detection
(detection limit level 0.7) 

The non-detection
(detection limit level 0.7) 

Willow tit water purification plant 

Tap water 

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.6) 

 Water supply Haramizu

The non-detection
(detection limit level 0.4) 

The non-detection
(detection limit level 0.5) 

May 22
9:00

Kawai water purification plant 

Tap water 

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.6) 

 Water supply Haramizu

The non-detection
(detection limit level 0.6) 

The non-detection
(detection limit level 0.5) 

 

May 23
9:00 

 

Nishiya water purification plant 

Tap water 

The non-detection
(detection limit level 0.6) 

The non-detection
(detection limit level 0.7) 

 Water supply Haramizu

The non-detection
(detection limit level 0.6) 

The non-detection
(detection limit level 0.7) 

Willow tit water purification plant 

Tap water 

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.6) 

 Water supply Haramizu

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.6) 

April 10
9:00 

Kawai water purification plant 

Tap water 

The non-detection
(detection limit level 0.7) 

The non-detection
(detection limit level 0.4) 

 Water supply Haramizu

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.5) 

April 11 
9:00

Nishiya water purification plant 

Tap water 

The non-detection
(detection limit level 0.4) 

The non-detection
(detection limit level 0.4) 

 Water supply Haramizu

The non-detection
(detection limit level 0.7) 

The non-detection
(detection limit level 0.6) 

Willow tit water purification plant 

Tap water 

The non-detection
(detection limit level 0.5) 

The non-detection
(detection limit level 0.6) 

 Water supply Haramizu

The non-detection
(detection limit level 0.3) 

The non-detection
(detection limit level 0.6) 

  

 

 

Test result until May, 2012

We publish tap water and test result of water supply Haramizu in page according to each.
In addition, we inspect water supply Haramizu from October, 2011.


 ※About notation method of test result
 "The non-detection" (detection limit level about ○○) means that radiological density is less than detection limit level (the lowest density that device measuring radioactive material can measure).
 

About water purification plant supplying Yokohama-shi with water

 The Yokohama city is supplied with water by the following water purification plant.

  • Water purification plant ... willow tit water purification plant of City of Yokohama, Water Works Bureau, Nishiya water purification plant, Kawai water purification plant
  • Water purification plant ... Ayase water purification plant of wide area Channel company group in Kanagawa, Sagamihara water purification plant, west Nagasawa water purification plant

 

 

Related link

 

Mobile version (only as for the latest result of a measurement)

   You read the next code with cell-phone, and please access.

  

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