Levels of pyrethroids (µg/kg) in fish samples from the River Calder, West Yorkshire (UK).

Table 12: Levels of pyrethroids (µg/kg) in fish samples from the River Calder, West Yorkshire (UK).

	Fish Sample
Pyrethroid	Calder 1	Calder 2	Calder 3	Calder 4	Calder 5	Calder 6
Permethrin cis	886.9	1204.4	862.3	922.25	568.28	398.46
Permethrin trans	108.9	130.0	157.58	281.74	474.76	100.6
Cyfluthrin	6.39	14.14	19.16	26.4	5.79	9.75
Cypermethrin	12.24	32.86	45.33	63.64	3.48	29.47
Fenvalerate cis	4.02	2.7	2.56	2.43	1.35	1.15
Fenvalerate trans	0.49	5.82	4.4	4.96	2.84	2.72
Deltamethrin	60.04	71.86	17.08	119.3	22.9	22.23

All concentrations at µg kg^-1 level.