Table 3. Terminology Used to Classify Toxicity (Adapted from the Pesticide Properties DataBase⁴⁰).

concentration at which toxicity is reported (in mg/L)	terms used
Acute Toxicity
>100	“low toxicity” or “toxic at high concentrations”
0.1–100	“moderate toxicity” or “toxic at moderate concentrations”
<0.1	“high toxicity” or “toxic at low concentrations”
Chronic Toxicity
>10	“low toxicity” or “toxic at high concentrations”
0.01–10	“moderate toxicity” or “toxic at moderate concentrations”
<0.01	“high toxicity” or “toxic at low concentrations”