| 調査年 | 採取月 | ｐＨ | ＤＯ | ＢＯＤ | ＣＯＤ | ＳＳ | 全窒素 | 全燐 | 塩素イオン | 透視度 |
| (mg/l) | (mg/l) | (mg/l) | (mg/l) | (mg/l) | (mg/l) | (mg/l) | (cm) | |||
| 1991 | 夏 | 8.45 | 7.93 | 9.3 | 11.1 | 52.3 | 3.50 | 0.577 | 1155.5 | 9.8 |
| 1991 | 秋 | 8.48 | 9.38 | 8.2 | 10.0 | 28.7 | 2.93 | 0.437 | 822.3 | 13.8 |
| 1991 | 冬 | 8.20 | 9.78 | 6.3 | 8.2 | 35.8 | 4.17 | 0.343 | 981.0 | 11.7 |
| 1992 | 春 | 8.58 | 8.38 | 8.6 | 10.2 | 23.3 | 3.50 | 0.523 | 475.7 | 16.2 |
| 1992 | 夏 | 8.75 | 9.15 | 8.9 | 11.2 | 44.3 | 3.00 | 0.513 | 1835.0 | 13.2 |
| 1992 | 秋 | 8.43 | 9.88 | 7.9 | 12.3 | 41.0 | 4.30 | 0.437 | 896.2 | 12.0 |
| 1992 | 冬 | 8.62 | 11.83 | 8.1 | 10.0 | 28.0 | 3.83 | 0.340 | 324.7 | 15.7 |
| 1993 | 春 | 8.15 | 10.50 | 8.3 | 11.0 | 32.8 | 3.77 | 0.437 | 1125.5 | 18.5 |
| 1993 | 夏 | 7.53 | 6.40 | 7.2 | 9.9 | 27.7 | 3.30 | 0.423 | 1788.0 | 22.3 |
| 1993 | 秋 | 7.77 | 7.07 | 5.7 | 8.5 | 30.7 | 3.10 | 0.287 | 1533.3 | 20.0 |
| 1993 | 冬 | 8.30 | 11.33 | 6.1 | 7.2 | 18.3 | 3.53 | 0.207 | 1234.0 | 20.3 |
| 1994 | 春 | 8.33 | 7.63 | 7.4 | 9.5 | 23.7 | 2.97 | 0.340 | 1863.0 | 17.0 |
| 1994 | 夏 | 8.57 | 8.93 | 11.0 | 13.3 | 49.7 | 2.73 | 0.570 | 676.7 | 9.3 |
| 1994 | 秋 | 8.73 | 7.93 | 6.4 | 12.5 | 29.3 | 2.10 | 0.313 | 3197.7 | 12.3 |
| 1994 | 冬 | 8.57 | 11.00 | 7.6 | 11.4 | 29.3 | 3.70 | 0.253 | 2053.7 | 13.7 |
| 1995 | 春 | 8.33 | 10.57 | 6.4 | 11.7 | 35.0 | 3.87 | 0.300 | 2227.0 | 15.0 |
| 1995 | 夏 | 8.43 | 9.03 | 8.1 | 9.8 | 34.3 | 3.13 | 0.333 | 606.0 | 9.5 |
| 1995 | 秋 | 8.53 | 8.70 | 6.2 | 12.7 | 32.0 | 2.50 | 0.370 | 2557.7 | 15.0 |
| 1995 | 冬 | 8.73 | 11.70 | 7.3 | 13.0 | 33.3 | 4.85 | 0.383 | 1366.3 | 12.0 |
春： ３，４，５月
夏： ６，７，８月
秋： ９，１０，１１月
冬： １２，１，２月
