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更新日:2017年3月24日

Water Quality Monitoring Results

As of April 1st, 2012

Municipality Location Radioactive Concentration (Bq/kg), left = Cs-134, right = Cs-137 Source
Drinking Water *1 Source Water *2
3/18 3/19 3/20 3/21 3/22 3/18 3/19 3/22
Hitachi Moriyama Treatment Plant -   - - - -   - Kuji River
Juo Treatment Plant -   - - - -   - Juo River
Kita-Ibaraki Nakago Treatment Plant nd/nd - - - - nd/nd - - Okita River
Ryugasaki Wakashiba Pumping Plant - - -   - - - - Lake Kasumigaura
Toride Togashira Pumping Plant - - -   - - - - Tone River
Fujishiro Pumping Plant - - -   - - - - Tone River
Ushiku Ushiku Pumping Plant - - -   - - - - Tone River
Tone Tone Pumping Plant - - -   - - - - Tone River
Tokaimura Tojuku Treatment Plant -   - - - - - - Kuji River
Mito Kozogawa Treatment Plant nd/nd - - - - - - - Naka River
Kashima Kashima City Hall - -   - - - - - Lake Kasumigaura
Moriya Moriya Treatment Plant - - - -   - - - Tone River
Sakuragawa Iwase Municipal Office - - - -   - - - Lake Kasumigaura
Hitachiota Zuiryu Treatment Plant - - - - - - -   Groundwater
Suifu Hokubu Treatment Plant - - - -   - - - Yamada River
Kamisu Wakamatsu Kindergarten - - - - - - - - Wani River
Ishioka Sonobe Treatment Plant   - - - - - - - Groundwater

 

 

As of April 1st, 2012, the guidelines for radioactive substances in water have been revised as follows:
- Management value for radioactive substances in water (management value for impurity levels in water facilities) -> 10Bq/kg of radioactive Cesium (total for both Cs-134 and Cs-137)
- Targeted Subject -> radioactive Cesium (Cs-134 and Cs-137)
- Measurement Device -> A Germanium semi-conductor must be used, and one is being used in Ibaraki
- Detectable Limit Values -> Aim to keep both Cs-134 and Cs-137 below 1Bq/kg; Ibaraki is below 1Bq/kg; 'not detected' (nd) means that the value was below the detectable limit.

*1 Drinking Water refers to water that has been purified at a treatment plant and is directly consumed.

*2 Source Water refers to the water from a source, prior to being treated.

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