表6−14 底質総水銀濃度の推移(年平均)
(単位:mg/kg)
| S49 | 53 | 55 | 57 | 59 | 61 | 63 | H2 | 4 | 6 | 8 | 9 | 10 | |
| St.. 5 | 1.59 | 0.64 | 0.46 | 0.72 | 0.58 | 0.52 | 0.64 | 0.75 | 0.71 | 0.82 | 0.66 | 0.73 | 0.72 |
| St.. 7 | 1.03 | 0.95 | 0.87 | 0.82 | 0.80 | 0.77 | 0.88 | 0.91 | 0.96 | 0.97 | 0.77 | 0.82 | 0.85 |
| St.. 8 | 3.47 | 3.67 | 3.05 | 1.83 | 1.45 | 2.23 | 2.20 | 1.60 | 2.18 | 1.30 | 1.20 | 1.80 | 1.30 |
| St..13 | 0.91 | 0.68 | 0.69 | 0.71 | 0.39 | 0.53 | 0.65 | 0.78 | 0.75 | 0.73 | 0.60 | 0.61 | 0.68 |
| St..15 | 1.69 | 0.67 | 0.61 | 0.58 | 0.45 | 0.43 | 0.61 | 0.61 | 0.74 | 0.66 | 0.52 | 0.48 | 0.55 |