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Table 1 Species sensitivity distribution (SSD) parameters and data filters used to derive multiple thresholds as part of the tiered framework

From: Risk-based management framework for microplastics in aquatic ecosystems

Threshold description Hazard concentration (HC) Data collapsing method Point estimate Biological scale of endpoints
Threshold 1- “Investigative monitoring” HC5 1st quartile lower 95% molecular to population
Threshold 2- “Discharge monitoring” HC5 1st quartile median molecular to population
Threshold 3- “Management planning” HC5 median median organismal and population
Threshold 4- “Source control measures” HC10 median median organismal and population