Summary of pesticide residues detected in bottom sediments, National Surface Water Monitoring Program1
| Chemical detected | Occurrence (%) | Maximum value (nanograms/liter) |
|---|---|---|
| Chlordane | 15.3 | 2,964.0 |
| Dieldrin | 21.7 | 5,300.0 |
| Endrin | 1.3 | 2.9 |
| o,p’—DDT | 2.9 | 7.2 |
| o,p’—DDE | 0.5 | 1.3 |
| o,p’—DDT | 13.2 | 110.6 |
| o,p’—DDT | 22.7 | 163.0 |
| Toxaphene | 1.8 | 814.5 |
| Diazinon | 0.5 | 7.1 |
| Malathion | ND2 | ND2 |
| Silvex | 0.2 | 6.3 |
| 2,4-D | 0.2 | 14.9 |
| 2,4,5-T | 0.2 | 9.1 |
| Atrazine | 0.7 | 11.9 |
| Simazine | 0.2 | 0.1 |