Permethrin
Summary
Persistence. Permethrin degrades slowly in the environment.
Bioaccumulation. Permethrin has high potential for bioaccumulation.
Toxicity. Permethrin has very high acute toxicity.
Risk. The use of permethrin (year of Swedish sales data unclear) has been assessed to pose a moderate environmental risk.
This summary information comes from from Fass Nix (permethrin (downloaded 2013-09-03). No new environmental information for permethrin is published on fass.se (2018-09-06).
Detailed information
Fass environmental information
Fass environmental information for Nix (permethrin) (downloaded 2013-09-03).
Fara
Persistence: The half-life of soil degradation is 5–55 days. It is indicated that permethrin is slowly degraded in the environment.
Bioaccumulation: Permethrin has a high potential for bioaccumulation (BCF 400–20 000 [fish]). The substance has high log Kow (6.5 i 25°C) and the properties are confirmed in studies on e.g. fish.
Acute toxicity: There is data for 3 trophic levels, lowest for crustacean (D. magna) 0.0001 mg/L.
Risk
PEC/PNEC is based on sales data in Sweden "in the last year" (unclear what year it means). PEC/PNEC = 1.7 which gives the risk moderate.
Author: Health and Medical Care Administration, Region Stockholm