Report from the Sub-comittee on the environment and health

<strong>Sub</strong>stance Permitted/
banned
agric./urban
24
Number
of
analyse
s
Number of
analyses with
finds
Number of
screens
analysed
Number of
screens
with finds
Number of
screens ≥
0.1 µg/L
Finds %
> detec.
Finds %
≥ 0,1 µg/L
Dichlobenil B / NA 67 1 48 1 0 2.1
BAM B / NA 154 34 78 13 6 16.7 7.7
Atrazine B / ANA 710 44 138 14 5 10.1 3.6
Desethylatrazine B / ANA 135 26 75 11 3 14.7 4.0
Desisopropylatrazine PB / ANA 133 14 75 10 3 13.3 4.0
Hydroxyatrazine B / ANA 39 2 37 2 1 5.4 2.7
Chloridazon P / A 30 0 21 0 0
Hexazinone B / NA 128 1 74 1 0 1.4
Metamitron P / A 67 0 53 0 0
Metribuzin P / A 30 0 21 0 0
Terbuthylazine P / A 124 1 75 1 0 1.3
Hydroxy-terbuthylazine P / A 9 1 9 1 0 11.1
Dichloroprop R / A 719 19 138 7 2 5.1 1.4
MCPA R / A 714 5 138 5 1 3.6 0.7
Mechlorprop R / A 715 16 138 6 1 4.3 0.7
DNOC B / A 713 1 137 1 0 0.7
Dinoseb B / A 713 1 138 1 0 0.7
Simazine P / A Fr 707 6 138 6 1 4.3 0.7
2,4-D R / A 509 3 127 3 0 2.4 0.7
Bentazone P / A 133 12 76 3 2 3.9 2.6
Isoproturon P / A 131 1 76 1 0 1.3
All substances 765 113 141 48 15 34.0 10.6
Table 4.8
Pesticides and metabolites found in ground water in <strong>the</strong> five nationwide monitoring catchment areas
during <strong>the</strong> period 1990-1997. The median value has been calculated on <strong>the</strong> basis of median values at
screen level. GRUMO pesticides are in bold (GEUS 1998) (µg/L = microgramme per litre).
Ground-water
monitoring, LOOP
Analyses Filters
with
analyses
Filters
containing
findings
Screens with
finds ≥0.1 µg/L
Median
values
Max conc.
Pesticides Number Number Numbe % Numbe % µg/L µg/L
r
r
Atrazine 471 105 7 6.7 1 1.0 0.01 0.12
Desethylatrazine 173 59 13 22.0 1 1.7 0.02 0.22
Desisopropylatrazin
e
150 53 15 28.3 5 9.4 0.02 0.24
Hydroxyatrazine 46 37 2 5.4 0 0.02
2,4-D 386 94 4 4.3 1 1.1 0.04 0.12
Bentazone 223 62 14 22.6 0 0.01 0.05
Cyanazine 173 59 2 3.4 0 0.02
Dichloroprop 466 104 7 6.7 0 0.02 0.04
Dinoseb 467 105 4 3.8 1 1.0 0.01 0.12
DNOC 467 105 5 4.8 1 1.0 0.02 0.10
Isoproturon 236 62 5 8.1 0 0.02 0.05
MCPA 467 105 10 9.5 0 0.02 0.07
Mechlorprop 463 105 12 11.4 0 0.02 0.08
Metamitron 143 57 3 5.3 0 0.01
Pirimicarb 23 11 2 18.2 0 0.01
Propyzamide 18 9 1 11.1 1 11.1 0.11
Simazine 461 105 3 2.9 0 0.04 0.05
Triazines (including atrazine) and <strong>the</strong>ir metabolites are included in <strong>the</strong>
calculation as equally distributed between use in agriculture and in urban
areas. However, since agricultural land predominates in <strong>the</strong> groundwater
monitoring programme, <strong>the</strong>se substances should presumably be weighted