| Moyennes annuelles par paramètre | Valeur seuil | Année(s) | ||||||||||
| 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 1996-2000 | ||
Nitrates (mg(NO3)/L) | 50 | - | - | - | - | - | - | - | - | 0.38 | 0.7 | - |
0.5 | - | - | - | - | - | - | - | - | - | - | - | |
- Flufenoxuron (µg/L), Diuron (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.05 | <0.05 | - |
- Métazachlore (µg/L), Terbuthylazine (µg/L), Simazine (µg/L), Métolachlore (µg/L), Chlortoluron (µg/L), Atrazine (µg/L), Alachlore (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.02 | <0.02 | - |
- Néburon (µg/L), Atrazine déisopropyl (µg/L), Atrazine déséthyl (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.04 | <0.04 | - |
- Trifluraline (µg/L), HCH gamma (µg/L), HCH delta (µg/L), HCH bêta (µg/L), HCH alpha (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.01 | <0.01 | - |
- Linuron (µg/L), Isoproturon (µg/L), Cyanazine (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.03 | <0.03 | - |
- Diquat (µg/L), Paraquat (µg/L), Mercaptodiméthur (µg/L), Ioxynil (µg/L), Aldicarbe (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.05 | - | - |
- Formothion (µg/L), Dichlorvos (µg/L), Diazinon (µg/L), Azinphos méthyl (µg/L), Chlorpyriphos-éthyl (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.03 | - | - |
- Disulfoton (µg/L), Fénitrothion (µg/L), Azinphos éthyl (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.04 | - | - |
- Parathion méthyl (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.02 | - | - |
- Parathion éthyl (µg/L), Hexachlorobenzène (µg/L), Heptachlore époxyde (µg/L) | 0.9 | - | - | - | - | - | - | - | - | <0.01 | - | - |
- Heptachlore (µg/L), Aldrine (µg/L) | 0 | - | - | - | - | - | - | - | - | <0.01 | - | - |
- Dieldrine (µg/L) | 0 | - | - | - | - | - | - | - | - | <0.02 | - | - |
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