| 水质监测指标 | 主成分1 | 主成分2 | 主成分3 |
| DO | 0.786 | −0.567 | 0.111 |
| CODMn | −0.682 | −0.496 | 0.337 |
| CODCr | 0.510 | 0.614 | 0.430 |
| BOD5 | −0.880 | 0.341 | 0.066 |
| NH3-N | 0.104 | −0.025 | 0.940 |
| TN | 0.825 | −0.432 | −0.08 |
| TP | 0.579 | 0.783 | −0.086 |
| 特征值 | 3.142 | 1.861 | 1.213 |
| 方差贡献率 | 44.887 | 26.591 | 17.331 |