Table 3. Time-weighted mean values of selected pesticides during the fall 2017 (TWM_fall) and spring/summer 2018 (TWM_{spring/summer}) sampling campaign.

Substance	LOQ [ng/L]	Fall 2017: Waschbach (n = 3) [ng/L]	Spring/Summer 2018: Waschbach (n = 3) [ng/L]	Fall 2017: Weidgraben (n = 3) [ng/L]	Spring/Summer 2018: Weidgraben (n = 2) [ng/L]
		TWM a fall	TWM a spring/summer	TWM a fall	TWM a spring/summer
Dimethachlor	2	20	7.3	34	<LOQ
Dimethachlor-ESAb	5	19	16	380	37
Dimethachlor-OAc	5	12	7.6	300	9.2
Dimethenamid	2	53	27	23	8.7
Dimethenamid-ESAb	10	21	14	45	<LOQ
Dimethenamid-OAc	20	<LOQ	<LOQ	24	<LOQ
Dimethomorph	2	28	<LOQ	2.2	<LOQ
Flurtamone	1	27	2.1	<LOQ	<LOQ
Isoproturon	0,5	59	3.1	12	<LOQ
Metamitron	10	11	170	<LOQ	530
Desamino-metamitron	5	18	64	<LOQ	52
Metazachlor	1	58	8.1	81	<LOQ
Metazachlor-ESAb	20	210	170	530	120
Metazachlor-OAc	20	120	76	400	36
Prosulfocarb	50	<LOQ	<LOQ	<LOQ	96
Quinmerac	5	61	26	330	<LOQ
Terbuthylazine	1	9.5	43	5.6	45
Thiacloprid	2	7.8	65	<LOQ	3.4
Thiamethoxam	5	20	14	<LOQ	67

Notes.

^aTime-weighted mean value of the concentration of the composite samples

^bESA, ethanesulfonic acid

^cOA, oxalic acid