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表8 トリブチルスズ化合物に関する水質調査結果(平成2年度~8年度指定化学物質等検討調査より)
調 査 地 点 |
平成2年度 |
平成3年度 |
平成4年度 |
平成5年度 |
平成6年度 |
平成7年度 |
平成8年度 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
検体1 |
検体2 |
検体3 |
石狩川河口 |
- |
- |
- |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
堤川河口 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
nd |
nd |
nd |
八郎湖 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
仙台湾 |
0.018 |
0.011 |
0.004 |
0.006 |
nd |
nd |
nd |
nd |
nd |
0.005 |
nd |
nd |
nd |
0.007 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
小名浜港 |
0.009 |
0.007 |
0.009 |
0.006 |
0.008 |
0.009 |
0.005 |
0.01 |
nd |
0.003 |
nd |
0.007 |
0.004 |
0.005 |
nd |
nd |
nd |
nd |
nd |
0.005 |
nd |
霞ケ浦 |
nd |
nd |
nd |
nd |
0.004 |
0.003 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
市原・姉崎海岸 |
0.045 |
0.051 |
0.042 |
0.017 |
0.011 |
0.016 |
0.003 |
0.003 |
0.003 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
花見川河口 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
nd |
nd |
nd |
nd |
nd |
nd |
隅田川河口 |
0.012 |
0.012 |
0.014 |
0.016 |
0.028 |
0.015 |
0.004 |
0.004 |
0.004 |
0.005 |
0.006 |
0.005 |
0.008 |
0.007 |
0.005 |
0.005 |
0.005 |
0.006 |
0.005 |
0.004 |
0.004 |
東京湾中瀬 |
0.009 |
0.012 |
0.009 |
0.003 |
nd |
0.015 |
nd |
0.005 |
0.004 |
0.003 |
0.004 |
0.003 |
0.003 |
nd |
0.003 |
0.003 |
0.003 |
nd |
0.003 |
nd |
nd |
横浜港 |
0.027 |
0.033 |
0.046 |
0.018 |
0.003 |
0.018 |
0.012 |
0.008 |
0.006 |
0.004 |
0.004 |
0.004 |
nd |
0.005 |
0.003 |
0.004 |
0.003 |
nd |
0.004 |
nd |
0.003 |
信濃川河口 |
- |
- |
- |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
諏訪湖 |
- |
- |
- |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
犀川河口 |
nd |
nd |
0.03 |
0.015 |
nd |
nd |
0.005 |
nd |
0.034 |
0.004 |
nd |
0.005 |
nd |
nd |
nd |
0.005 |
nd |
0.01 |
nd |
nd |
nd |
清水港 |
0.003 |
0.007 |
0.008 |
nd |
nd |
nd |
nd |
0.007 |
nd |
nd |
nd |
nd |
0.005 |
0.005 |
nd |
nd |
nd |
nd |
0.005 |
nd |
nd |
名古屋港 |
0.005 |
0.005 |
0.004 |
0.005 |
0.008 |
0.004 |
0.004 |
0.004 |
0.003 |
0.009 |
nd |
nd |
0.006 |
0.003 |
0.004 |
nd |
nd |
nd |
nd |
nd |
nd |
四日市港 |
0.021 |
- |
- |
0.01 |
0.01 |
0.008 |
0.014 |
0.011 |
0.016 |
0.006 |
0.007 |
0.006 |
0.025 |
0.01 |
0.01 |
0.006 |
nd |
0.008 |
0.003 |
0.004 |
nd |
琵琶湖南湖 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
宮津港 |
0.014 |
0.009 |
0.007 |
0.003 |
nd |
nd |
0.006 |
0.003 |
0.006 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
桂川宮前橋 |
nd |
nd |
nd |
- |
- |
- |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
大和川河口 |
- |
- |
- |
0.005 |
0.005 |
0.007 |
0.022 |
0.024 |
0.007 |
nd |
0.004 |
0.005 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
大阪港 |
0.02 |
0.02 |
0.02 |
0.067 |
0.037 |
0.062 |
0.067 |
0.037 |
0.062 |
0.019 |
0.014 |
0.014 |
0.006 |
0.006 |
0.006 |
0.01 |
0.011 |
0.013 |
0.008 |
0.011 |
0.008 |
姫路沖 |
0.014 |
0.013 |
0.013 |
nd |
nd |
nd |
nd |
nd |
nd |
- |
- |
- |
nd |
nd |
nd |
0.042 |
0.016 |
0.018 |
nd |
0.005 |
0.009 |
水島沖 |
0.011 |
0.008 |
0.015 |
0.013 |
0.008 |
0.008 |
0.005 |
0.011 |
0.009 |
0.027 |
0.013 |
0.013 |
- |
- |
- |
nd |
nd |
nd |
nd |
nd |
nd |
呉港 |
0.016 |
0.024 |
0.012 |
0.014 |
0.013 |
0.028 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
広島湾 |
|
|
|
|
|
|
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
徳山湾 |
0.005 |
0.004 |
0.005 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
吉野川河口 |
|
|
|
0.012 |
0.004 |
0.004 |
0.083 |
0.084 |
0.08 |
0.044 |
0.047 |
0.049 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.003 |
nd |
高松港 |
0.025 |
0.027 |
0.023 |
0.034 |
0.048 |
0.024 |
0.014 |
0.0014 |
0.005 |
0.011 |
0.011 |
0.007 |
0.009 |
0.004 |
0.004 |
0.004 |
0.004 |
0.006 |
0.012 |
0.014 |
0.003 |
四万十川河口 |
- |
- |
- |
- |
- |
- |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
洞海湾 |
0.048 |
0.029 |
0.049 |
0.015 |
0.02 |
0.012 |
0.007 |
0.011 |
0.014 |
0.006 |
0.006 |
0.01 |
0.006 |
0.022 |
0.007 |
0.017 |
0.013 |
0.018 |
0.006 |
0.005 |
0.01 |
博多湾 |
0.01 |
0.009 |
0.012 |
0.006 |
0.008 |
0.007 |
0.026 |
0.028 |
0.012 |
0.02 |
0.025 |
0.017 |
0.006 |
0.005 |
0.006 |
nd |
nd |
nd |
nd |
nd |
nd |
大牟田沖 |
0.004 |
0.004 |
0.004 |
0.013 |
0.027 |
0.027 |
- |
- |
- |
nd |
nd |
nd |
0.03 |
nd |
nd |
0.04 |
0.01 |
0.01 |
0.004 |
0.003 |
0.004 |
伊万里湾 |
|
|
|
|
|
|
0.032 |
0.019 |
0.008 |
0.007 |
0.008 |
0.007 |
0.01 |
0.013 |
0.01 |
0.007 |
0.005 |
0.005 |
- |
- |
- |
長崎港 |
0.04 |
0.02 |
0.04 |
0.014 |
0.011 |
0.008 |
0.003 |
0.003 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.003 |
nd |
nd |
nd |
大淀川河口 |
0.016 |
0.005 |
0.004 |
0.013 |
0.011 |
0.015 |
0.004 |
nd |
nd |
nd |
0.003 |
nd |
0.003 |
nd |
nd |
0.013 |
nd |
nd |
0.006 |
0.003 |
nd |
五反田川五反田橋 |
nd |
nd |
nd |
0.003 |
0.003 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
統一検出限界値 |
|
0.003 |
|
|
0.003 |
|
|
0.003 |
|
|
0.003 |
|
|
0.003 |
|
|
0.003 |
|
|
0.003 |
|
検 出 頻 度 |
|
62/79 |
|
|
60/93 |
|
|
52/99 |
|
|
42/99 |
|
|
35/99 |
|
|
31/105 |
|
|
27/105 |
|
最 大 値 |
|
0.051 |
|
|
0.067 |
|
|
0.084 |
|
|
0.049 |
|
|
0.03 |
|
|
0.042 |
|
|
0.014 |
|
最 小 値 |
|
nd |
|
|
nd |
|
|
nd |
|
|
nd |
|
|
nd |
|
|
nd |
|
|
nd |
|
幾 何 平 均 |
|
0.0088 |
|
|
0.0057 |
|
|
0.0044 |
|
|
0.0032 |
|
|
0.0029 |
|
|
0.0025 |
|
|
0.0021 |
|
注1 : TBTO換算値
注2 : ndは不検出,”-”は欠測,空欄部分では調査を行っていない。
注3 : 幾何平均値は,ndを,各地点ごとの検出限界値の 1/2として算出した。