| Date | Location | Pesticide | Value µg/L |
| 3/06/2013 | Murray River Dip at pump, Walwa | 2,4-D | 0.01 |
| 3/06/2013 | Murray River Dip at pump, Walwa | Atrazine | 0.02 |
| 3/06/2013 | Murray River Dip at pump, Walwa | MCPA | 0.02 |
| 3/06/2013 | Murray River Dip at pump, Walwa | Triclopyr | 0.03 |