Table 1.
Pesticide threshold concentrations for aquatic invertebrates
| Threshold Concentration (ppb) | |||
|---|---|---|---|
| Chlorpyrifos | Diazinon | Malathion | |
| USEPA OPP aquatic life bench marks Acutea Chronica |
0.05 0.04 |
0.17 (0.16 b) 0.11 (0.10 b) |
0.3 0.035 |
| California Regional Waterboard Aquatic Life Criteriab Acute Chronic |
0.025 0.015 |
0.083 0.072 |
0.17 0.028 |
| Web-ICE predictions for vernal pool fairy shrimp (confidence intervals) | 1.29 (0.227 – 7.40)c | 3.64 (0.95 – 14.02)d | 6.64 (1.87 – 23.52)e |
a
USEPA OPP aquatic life bench marks (USEPA, 2017)
b
California Regional Water BoardWater Quality Criteria (https://www.waterboards.ca.gov/centralvalley/water_issues/tmdl/central_valley_project s/san_joaquin_op_pesticide/index.html)
c
Surrogate species = Thamnocehphalis platyurus (0.52 μg/L)
d
Surrogate species = Daphnia magna (1.9 μg/L)
e
Surrogate species = Daphnia magna (3.7 μg/L)