Table 4. The total number of sites (out of 5) and detections (out of a total of 313 samples analyzed from all sites and years) with residue concentrations for which HQ >50 using LD50 values for either oral or contact toxicity.
| Pesticide | PHQ based on contact or oral LD50 | Concentration in ppb forPHQ = 50 | Sites with with PHQ > 50 | Total detections | Samples with PHQ > 50 | Samples with PHQ > 500 |
|---|---|---|---|---|---|---|
| Phosmet | Orala | 18.5 | 2 | 103 | 20 | 4 |
| Contact | 11.0 | 4 | 24 | 9 | ||
| Imidacloprid | Oral | 0.195 | 5 | 38 | 38 | 21 |
| Contact | 2.2 | 4 | 20 | 1 | ||
| Indoxacarb | Orala | 9.7 | 1 | 4 | 4 | 2 |
| Contacta | 3.5 | 1 | 4 | 4 | ||
| Chlorpyrifos | Oral | 12.5 | 1 | 14 | 1 | 0 |
| Contact | 5.0 | 4 | 23 | 4 | ||
| Fipronil | Oral | 0.21 | 1 | 2 | 2 | 1 |
| Contact | 0.23 | 1 | 2 | 1 | ||
| Thiamethoxam | Oral | 0.25 | 3 | 3 | 4 | 2 |
| Contact | 1.2 | 2 | 3 | 0 | ||
| Azinphos-methyl | Oral | 7.5 | 1 | 5 | 3 | 1 |
| Contact | 21 | 1 | 1 | 0 | ||
| Fenthion | Contact | 15.4 | 2 | 16 | 8 | 1 |
| Dinotefuran | Oral | 1.15 | 1 | 3 | 4 | 0 |
| Contact | 2.35 | 1 | 1 | 0 | ||
| Carbaryl | Contact | 55.0 | 4 | 127 | 14 | 0 |
| Fluvalinate | Contact | 10.0 | 1 | 1 | 1 | 0 |
| Methomyl | Oral | 14.5 | 2 | 12 | 4 | 0 |
| Contact | 8.0 | 2 | 6 | 0 | ||
| Diazinon | Oral | 10.0 | 1 | 3 | 1 | 0 |
| Contact | 11.0 | 1 | 1 | 0 | ||
| Malathion | Oral | 19.0 | 0 | 2 | 0 | 0 |
| Contact | 10.0 | 1 | 1 | 0 |
a
Based on LD50 from Agritox database [6].