Report of the sub-committee on the environment and health., Danish Environmental Protection Agency

Report of the sub-committee on the environment and health.

Table 4.11
Occurrence of metabolites (of a dichlobenil, b glyphosate, c atrazine) of pesticides in watercourses, with a breakdown by type of catchment area. The table shows the number of finds out of the total number of samples and the concentration range in microgramme per litre. Dichlobenil and atrazine may no longer be used in Denmark. The first studies were carried out by DMU in 1989-1991. In 1994-1996, a major study was carried out in Funen County. In 1996, the table includes data from several counties (Mogensen 1998).

Type of catchment area/Metabolite	2,6-dichloroben-zamide (BAM)^a	AMPA*,^b	desethyl-atrazine^c	desisopropyl-atrazine^c
Urban area	5/5; 0.03-0.4	n.a.	3/5; 0.01-0.03	4/5; 0.01-0.1
Mixed catchment area, clay	46/54; 0.05-0.2	5/5; 0.1-0.5	n.d./57	n.d./57
Mixed catchment area	5/5; 0.04-0.07	n.a.	n.d./5	n.d./5
Clayey agric. catchment area	63/72; 0.03-0.4	1/1; 0.5	6/72; 0.01-0.1	8/72; 0.01-0.2
Sandy agric. catchment area	12/25; 0.01-0.01	n.a.	n.d./25	n.d./25
Sandy/clayey catchment area	8/10; 0.01-0.009	n.a.	n.d./10	1/10; 0.02
Forest watercourse	4/25; 0.08-0.5	n.a.	n.d./25	n.d./25
Uncultivated catchment area	n.d./5	n.a.	n.d./5	n.d./5
Springs	3/12; 0.1-0.5	n.a.	n.d./12	n.d./12

* = AMPA has been detected in the same samples as the parent compound glyphosate. It is therefore likely that the metabolite comes from glyphosate, but other sources cannot be excluded.
n.a. = not analysed
n.d. = not detected