| OBSP Statistical Summary for DEETHYLATRAZINE (DESETHYL ATRAZINE) |
| Spike Level | Range | N | Mean | Std-Dev. | Median | F_Pseudo |
| ULTRA-LOW | 0.005-0.055 | 45 | 77% | 25% | 74% | 24% |
| LOW | 0.055-0.155 | 38 | 55% | 17% | 54% | 21% |
| MEDIUM | 0.155-0.55 | 25 | 67% | 12% | 69% | 10% |
| HIGH | 0.55-2.0 | 10 | 68% | 14% | 73% | 11% |