Spatiotemporal Variation and Risk Assessment of Pesticides in Water of the Lower Catchment Basin of Acheloos River, Western Greece

Table 2

Spatial distribution (six sampling points) of mean concentration and standard error (ng L⁻¹) of nineteen selected pesticides and metabolites for the total sampling period of three years (2005–2007).

(a)

		Insecticides (ng L^−1)
		Dichlorvos	Parathion methyl	Chlorpyrifos	Malaoxon	Dimethoate	Diazinon	Fenthion	Pirimiphos methyl	Chlorpyrifos methyl	Methidathion
2005–2007	S1	5.33±1.77^a	3.10±1.36^a	5.67±2.4^a	2.43±0.6^a	2.29±0.55	12.8±1.52^a	4.08±1.46^a	17.5±4.43	4.90±1.77	2.64±0.74
	S2	7.11±2.26^a	2.87±0.94^a	5.67±2.04^a	3.32±0.8^a	3.92±1.17	17.8±2.06^a,b	7.11±2.46^a,b	12.6±3.26	8.11±3.31	3.41±0.91
	S3	9.87±2.66^a,b	8.61±2.84^a,b	9.92±2.86^a,b	4.12±0.9^a	4.77±1.28	18.8±2.35^a,b	11.6±3.14^a,b,c	11.2±3.19	9.47±3.63	4.44±0.94
	S4	16.4±3.65^b	9.35±2.91^a,b	20.8±5.70^b	7.5±2.43^a,b	6.11±1.50	24.5±3.25^b	17.6±4.61^c	14.0±3.62	10.8±3.31	4.24±1.03
	S5	6.84±1.90^a	12.4±2.89^b	18.1±5.57^a,b	12.6±3.69^b	3.57±0.67	26.3±3.48^b	13.6±3.89^a,b,c	11.7±3.87	7.48±2.51	5.83±1.25
	S6	8.66±2.88^a	9.67±2.80^a,b	22.2±6.56^b	6.28±2.15^a	5.90±1.95	23.1±3.19^b	16.0±3.97^b,c	16.9±6.88	4.33±1.03	4.86±1.03

(b)

		Fungicides (ng L^−1)				Herbicides (ng L^−1)
		Triadimefon	Pyrazophos	Penconazole	Cyproconazole	Atrazine	Trifluralin	S-Metolachlor	DEA	Alachlor
2005–2007	S1	5.86±1.33	1.52±0.25	11.2±5.11	14.4±6.24	8.31±1.90	5.21±2.91	2.43±0.69	53.3±15.4	10.9±2.46
	S2	6.81±1.96	1.35±0.19	14.7±5.54	36.3±14.04	13.9±3.21	14.3±7.59	3.33±0.9	69.4±18.1	12.2±2.56
	S3	12.1±3.42	2.36±0.64	30.5±10.0	65.4±27.1	15.9±5.14	14.7±6.20	3.67±0.99	46.6±10.1	16.1±3.25
	S4	18.6±6.60	3.41±1.28	26.4±9.05	67.6±22.1	30.7±11.6	19.2±7.02	1.7±0.37	59.2±13.5	20.9±4.51
	S5	15.7±3.03	3.38±1.04	27.7±10.1	92.0±33.5	27.0±10.7	15.6±5.90	2.09±0.67	47.9±9.99	27.7±8.07
	S6	13.7±3.40	2.24±0.54	24.8±9.65	58.7±28.6	24.3±7.03	21.8±8.99	2.36±0.78	50.3±10.3	21.3±6.35

Different letters indicate significant differences at significance level P < 0.05 for the total sampling period of three years (2005–2007).