Research Project code：0350011991
Update date：Feb. 10, 2003
Non-regulated chemicals of nine monitoring rivers in Gunma
1994 - 2001
Investigating Researcher (3)：
On the revision of environmental criteria in 1993, judging from the gathered data so far some items were made to be the items to be monitored to gather further information instead of assigning them as environmental criteria. In Gunma prefecture monitoring of some of the items mentioned above were started in some rivers form 1994. The frequency of monitoring was twice a year from 1996 to 2000 but from 2001 it became once in August. This surveillance aims to help the works of conservation of water quality in the rivers.
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