Table 2 Proposed microplastics toxicity thresholds for food dilution, relevant for particle sizes between 1 and 5000 μm
From: Risk-based management framework for microplastics in aquatic ecosystems
Threshold | Particles/L (95% CI) | Mass (mg)/L (95% CI) |
|---|---|---|
Threshold 1- “Investigative monitoring” | 0.3a | 0.05a |
Threshold 2- “Discharge monitoring” | 3 (0.3 to 66) | 0.4 (0.05 to 11) |
Threshold 3- “Management planning” | 5 (0.4 to 219) | 0.9 (0.07 to 36) |
Threshold 4- “Source control measures” | 34 (3 to 859) | 6 (0.4 to 141) |