Table 1.

Concentrations (pg·L⁻¹) and detection rates (%) of OCPs in the Danshui River.

Compounds	Range	Mean ± SD	Median	Detection Rates
α-HCH	<MDL–253	50.5 ± 59.5	28.6	65
β-HCH	29.4–12,936	811 ± 2783	173	100
γ-HCH	<MDL–7743	455 ± 1673	50.8	90
δ-HCH	<MDL–546	76.6 ± 125	33.5	85
o,p′-DDE	<MDL–736	177 ± 227	76.4	70
p,p′-DDE	<MDL–110	20.3 ± 26.2	<MDL	45
o,p′-DDD	<MDL–1369	215 ± 385	25.9	45
p,p′-DDD	<MDL–589	68.0 ± 127	23.9	55
o,p′-DDT	<MDL–1180	93.8 ± 255	<MDL	40
p,p′-DDT	<MDL–561	266 ± 186	258	90
HCB	18.3–2716	431 ± 753	85.1	100
TC	<MDL–1315	102 ± 285	14.1	60
CC	<MDL–2075	173 ± 447	33.9	80
α-Endo	<MDL–234	53.0 ± 58.1	31.0	65
β-Endo	<MDL–8493	476 ± 1841	32.1	60
heptachlor	<MDL–1027	274 ± 347	59.5	70
heptachlor-epoxide	<MDL–956	151 ± 264	37.3	75
aldrin	16.5–3427	500 ± 729	350	100
dieldrin	<MDL–98.5	24.4 ± 27.5	<MDL	45
endrin	<MDL–657	54.2 ± 141	<MDL	45
endrin aldehyde	<MDL–199	44.4 ± 54.4	<MDL	45
endrin ketone	<MDL–110	23.4 ± 32.1	<MDL	20
ES	<MDL–338	45.2 ± 87.1	<MDL	35
methoxychlor	<MDL–1422	133 ± 312	<MDL	30
∑4HCHs	104–20,931	1394 ± 4490	310	100
∑6DDTs	116–3268	841 ± 680	628	95
∑24OCPs	1225–31,225	4719 ± 6794	2230	100