Moyennes annuelles par paramètreValeur
seuil		Année(s)
20142015201620172018201920202021202220232019-2023
Nitrates (mg(NO3)/L)
50
 - - - - -
26.8
26.5
27.5
27
24
 -
Somme pesticides analyses (?g/L)
0.5
 - -
<0.001
 - - -
0.082
0.102
0.112
 - -
- Atrazine desethyl (?g/L)
0.9
 - -
<0.02
 - -
0.0215
0.0193
0.019
0.0215
 - -
- Atrazine (?g/L)
0.9
 - -
<0.02
 - -
0.0105
0.0095
0.0095
0.0105
 - -
- Atrazine deisopropyl dese (?g/L)
0.9
 - - - - -
0.083
0.053
0.073
0.065
 - -
- Simazine (?g/L)
0.9
 - -
<0.02
 - -
0.00133
0.0015
0.0015
<0.005
 - -
- Thiafluamide (?g/L)
0.9
 - -
<0.02
 - -
0.0173
<0.002
<0.002
<0.005
 - -
- Diflufenicanil (?g/L)
0.9
 - -
<0.02
 - -
0.0153
<0.002
<0.002
<0.002
 - -
- Cyproconazole (?g/L)
0.9
 - -
<0.02
 - -
0.00167
<0.002
<0.002
<0.005
 - -
- Picoxystrobine (?g/L)
0.9
 - - - - -
0.00267
<0.002
<0.002
<0.005
 - -
- ETU (?g/L)
0.9
 - -
<0.05
 - -
<0.1
<0.1
<0.1
<0.1
 - -
- Chlormequat (?g/L), Mesotrione (?g/L), Diquat (?g/L)
0.9
 - -
<0.05
 - -
<0.01
<0.01
<0.01
<0.02
 - -
- Boscalid (?g/L), Terbuthylazine desethyl (?g/L), Ofurace (?g/L), Fludioxonil (?g/L), Azoxystrobine (?g/L), Acetochlore (?g/L), Metconazole (?g/L), Epoxiconazole (?g/L), Bromacil (?g/L), Dimethenamide (?g/L), Hexazinone (?g/L), Metazachlore (?g/L), Oxadixyl (?g/L), Napropamide (?g/L), Dimethomorphe (?g/L), Cyprodinil (?g/L), Terbuthylazine (?g/L), Pendimethaline (?g/L), Metribuzine (?g/L), Metamitrone (?g/L), Isoproturon (?g/L), Flusilazole (?g/L), Fenpropimorphe (?g/L), Diuron (?g/L), Cyanazine (?g/L), Chlortoluron (?g/L), Chloridazone (?g/L), Carbofuran (?g/L), Carbendazime (?g/L), Alachlore (?g/L)
0.9
 - -
<0.02
 - -
<0.002
<0.002
<0.002
<0.005
 - -
- Betacyfluthrine (?g/L), fenoxaprop-ethyl (?g/L), AMPA (?g/L), Alpha-cypermethrine (?g/L), Glufosinate (?g/L), Cypermethrine (?g/L), Aminotriazole (?g/L)
0.9
 - -
<0.05
 - -
<0.02
<0.02
<0.02
<0.02
 - -
- Mefenoxam (?g/L), Isoxaflutole (?g/L), Atrazine deisopropyl (?g/L)
0.9
 - -
<0.05
 - -
<0.005
<0.005
<0.005
<0.005
 - -
- Chlorure de choline (?g/L)
0.9
 - -
<0.05
 - -
<0.02
<0.02
<0.02
<0.2
 - -
- Florasulam (?g/L), Spiroxamine (?g/L), Prosulfuron (?g/L), 2,6-Dichlorobenzamide (?g/L), Metalaxyl (?g/L)
0.9
 - -
<0.05
 - -
<0.002
<0.002
<0.002
<0.005
 - -
- Pyraclostrobine (?g/L), Fenoxycarbe (?g/L), Fenbuconazole (?g/L), Difenoconazole (?g/L), Nicosulfuron (?g/L), Tebuconazole (?g/L), Oxadiazon (?g/L), Tebutame (?g/L), Propyzamide (?g/L), Lenacile (?g/L), Metolachlore (?g/L), Methabenzthiazuron (?g/L), Linuron (?g/L), Iprodione (?g/L), Ethofumesate (?g/L), Dichlorvos (?g/L), Cymoxanil (?g/L), Prosulfocarbe (?g/L)
0.9
 - -
<0.02
 - -
<0.005
<0.005
<0.005
<0.005
 - -
- Trinexapac-ethyl (?g/L), Piclorame (?g/L), Oryzalin (?g/L)
0.9
 - -
<0.05
 - -
<0.005
<0.005
<0.005
<0.02
 - -
- Flumioxazine (?g/L), Tefluthrine (?g/L), Methamidophos (?g/L), Chlorothalonil (?g/L), Phenmediphame (?g/L)
0.9
 - -
<0.02
 - -
<0.02
<0.02
<0.02
<0.02
 - -
- Pentachlorobenzene (?g/L), Hexachlorobenzene (?g/L), Endrine (?g/L), Endosulfan B (?g/L), Endosulfan A (?g/L)
0.9
 - -
<0.01
 - -
<0.001
<0.001
<0.001
<0.001
 - -
- Oxamyl (?g/L)
0.9
 - -
<0.02
 - -
<0.002
<0.002
<0.002
<0.02
 - -
- Metsulfuron methyle (?g/L), Sulcotrione (?g/L)
0.9
 - -
<0.05
 - -
<0.002
<0.002
<0.002
<0.02
 - -
- Metaldehyde (?g/L)
0.9
 - -
<0.03
 - -
<0.02
<0.02
<0.02
<0.02
 - -
- Fluroxypyr (?g/L)
0.9
 - -
<0.03
 - -
<0.01
<0.01
<0.01
<0.02
 - -
- Fenpropidine (?g/L)
0.9
 - -
<0.02
 - -
<0.001
<0.001
<0.001
<0.01
 - -
- Aclonifene (?g/L)
0.9
 - -
<0.02
 - -
<0.015
<0.015
<0.015
<0.015
 - -
- Phoxime (?g/L)
0.9
 - -
<0.02
 - -
<0.00015
<0.00015
<0.00015
<0.0005
 - -
- Glyphosate (?g/L)
0.9
 - -
<0.05
 - -
<0.02
<0.02
<0.02
<0.03
 - -
- Dicamba (?g/L)
0.9
 - -
<0.03
 - -
<0.005
<0.005
<0.005
<0.03
 - -
- Chlorfenvinphos (?g/L), Lambda-cyhalothrine (?g/L)
0.9
 - -
<0.02
 - -
<0.01
<0.01
<0.01
<0.01
 - -
- Benomyl (?g/L)
0.9
 - -
<0.05
 - -
<0.03
<0.03
<0.03
<0.03
 - -
- Trifluraline (?g/L), Chlorpyriphos-ethyl (?g/L)
0.9
 - -
<0.01
 - -
<0.005
<0.005
<0.005
<0.005
 - -
- Triclopyr (?g/L)
0.9
 - -
<0.03
 - -
<0.005
<0.005
<0.005
<0.02
 - -
- Propazine (?g/L)
0.9
 - -
<0.02
 - -
<0.005
<0.005
<0.005
<0.02
 - -
- Prochloraz (?g/L), Deltamethrine (?g/L)
0.9
 - -
<0.02
 - -
<0.001
<0.001
<0.001
<0.001
 - -
- Mecoprop (?g/L), 2,4-MCPA (?g/L), Bromoxynil (?g/L)
0.9
 - -
<0.03
 - -
<0.002
<0.002
<0.002
<0.005
 - -
- HCH gamma (?g/L), HCH delta (?g/L), HCH beta (?g/L), HCH alpha (?g/L)
0.9
 - -
<0.005
 - -
<0.001
<0.001
<0.001
<0.001
 - -
- Folpel (?g/L)
0.9
 - -
<0.02
 - -
<0.05
<0.05
<0.05
<0.05
 - -
- Dimethoate (?g/L)
0.9
 - -
<0.02
 - -
<0.005
<0.005
<0.005
<0.01
 - -
- Dichlorprop (?g/L), 2,4-D (?g/L), Bentazone (?g/L)
0.9
 - -
<0.03
 - -
<0.002
<0.002
<0.002
<0.02
 - -
- Bifenox (?g/L)
0.9
 - -
<0.05
 - -
<0.0036
<0.0036
<0.0036
<0.005
 - -
- Azinphos methyl (?g/L)
0.9
 - -
<0.01
 - -
<0.01
<0.01
<0.01
<0.01
 - -
- cis-Chlordane (?g/L), Triflusulfuron-methyl (?g/L), Carboxine (?g/L), Iprovalicarb (?g/L), Fenhexamid (?g/L), Mesosulfuron methyle (?g/L), Flupyrsulfuron meth sod (?g/L), Sulfosufuron (?g/L), Quizalofop ethyl (?g/L), Amidosulfuron (?g/L), phosmet (?g/L), 3,4-dichlorophenyluree (?g/L), 1-(3,4-diClPhyl)-3-M-uree (?g/L), Metosulame (?g/L), Teflubenzuron (?g/L), Rimsulfuron (?g/L), Pencycuron (?g/L), Myclobutanil (?g/L), Imidaclopride (?g/L), Diniconazole (?g/L), trans Chlordane (?g/L), Endosulfan sulfate (?g/L), Piperonyl butoxyde (?g/L), Imazalil (?g/L), Benalaxyl (?g/L), Chloroxuron (?g/L), Triadimefone (?g/L), Propanil (?g/L), Buturon (?g/L), Methoxychlore (?g/L), Mercaptodimethur (?g/L), Triallate (?g/L), Pyrazophos (?g/L), Oxydemeton-methyl (?g/L), 2,4-MCPB (?g/L), Fenthion (?g/L), Demeton-S-Methyl-Sulf. (?g/L)
0.9
 - - - - -
<0.005
<0.005
<0.005
<0.005
 - -
- Fenoxaprop (?g/L), Tolclofos-methyl (?g/L), Dichlormide (?g/L), Tetradifon (?g/L), Bromadiolone (?g/L), Imazamethabenz (?g/L), Acrinathrine (?g/L), Benfluraline (?g/L)
0.9
 - - - - -
<0.03
<0.03
<0.03
<0.03
 - -
- Thiacloprid (?g/L), Fluoxastrobine (?g/L), Benfuracarbe (?g/L), Azaconazole (?g/L), Anthraquinone (?g/L), Fipronil (?g/L), Kresoxym-methyl (?g/L), Tebufenozide (?g/L), Pyridabene (?g/L), Procymidone (?g/L), Bioresmethrine (?g/L), Chlorprophame (?g/L), Pyrimiphos-methyl (?g/L), Parathion methyl (?g/L), Parathion ethyl (?g/L), Fenitrothion (?g/L), Diclofop methyl (?g/L), Diazinon (?g/L), Demeton-S (?g/L), Demeton-O (?g/L), Butraline (?g/L), Bifenthrine (?g/L), Azinphos ethyl (?g/L)
0.9
 - - - - -
<0.01
<0.01
<0.01
<0.01
 - -
- Dinocap (?g/L), Difethialone (?g/L), Desmediphame (?g/L), Clethodim (?g/L), Fluroxypyr-meptyl (?g/L), Clodinafop-propargyl (?g/L), Thiometon (?g/L), Tribenuron-Methyle (?g/L), Fenothrine (?g/L), Fluquinconazole (?g/L), Famoxadone (?g/L), Cloquintocet-mexyl (?g/L), propaquizafop (?g/L), dithianon (?g/L), Haloxyfop-methyl (R) (?g/L), Triazamate (?g/L), Tebufenpyrad (?g/L), Clofentezine (?g/L), Carbosulfan (?g/L), Esfenvalerate (?g/L), Penconazole (?g/L), Thiophanate-methyl (?g/L), Depallethrine (?g/L), Chlorophacinone (?g/L), Cyfluthrine (?g/L), Dichlobenil (?g/L), Flurochloridone (?g/L), Triazophos (?g/L), Chlorpyriphos-methyl (?g/L), Permethrine (?g/L), Paraquat (?g/L), Neburon (?g/L), Formothion (?g/L), Ethoprophos (?g/L), Vinclozoline (?g/L), Pyridate (?g/L), Propargite (?g/L), Phosalone (?g/L), Omethoate (?g/L), Fluvalinate-tau (?g/L), Diallate (?g/L), Chlormephos (?g/L), Aldicarbe (?g/L)
0.9
 - - - - -
<0.02
<0.02
<0.02
<0.02
 - -
- Triticonazole (?g/L), Triazoxide (?g/L), Haloxyfop (?g/L), Lufenuron (?g/L), Thiazafluron (?g/L), Fenuron (?g/L), Dinitrocresol (?g/L)
0.9
 - - - - -
<0.002
<0.002
<0.002
<0.02
 - -
- Imazamox (?g/L), Flutolanil (?g/L), Fluazinam (?g/L), Difenacoum (?g/L), Dichlorophene (?g/L), Didemethylisoproturon (?g/L), Foramsulfuron (?g/L), Desmethylisoproturon (?g/L), Cycloxydime (?g/L), Iodosulfuron methyl (?g/L), Dimetachlore (?g/L), Paclobutrazole (?g/L), Quinmerac (?g/L), Fenamidone (?g/L), Terbumeton desethyl (?g/L), Quinoxyfen (?g/L), Clomazone (?g/L), Flurtamone (?g/L), fluridone (?g/L), Flazasulfuron (?g/L), Sebuthylazine (?g/L), Thifensulfuron methyl (?g/L), Hexaflumuron (?g/L), Dimefuron (?g/L), Bromuconazole (?g/L), Ethidimuron (?g/L), Thiabendazole (?g/L), Prometone (?g/L), Cycluron (?g/L), Isoxaben (?g/L), Norflurazone (?g/L), Tetraconazole (?g/L), Propoxur (?g/L), Bitertanol (?g/L), Metobromuron (?g/L), Flutriafol (?g/L), Dinosebe (?g/L), Carbaryl (?g/L), Pyrimethanil (?g/L), Hexaconazole (?g/L), Chlorsulfuron (?g/L), Carbetamide (?g/L), Triadimenol (?g/L), Terbutryne (?g/L), Terbumeton (?g/L), Secbumeton (?g/L), Propiconazole (?g/L), Prometryne (?g/L), Monuron (?g/L), Monolinuron (?g/L), Metoxuron (?g/L), Methomyl (?g/L), Ioxynil (?g/L), Fenarimol (?g/L), Desmetryne (?g/L), Ametryne (?g/L)
0.9
 - - - - -
<0.002
<0.002
<0.002
<0.005
 - -
- Carfentrazone-ethyl (?g/L), Mevinphos (?g/L)
0.9
 - - - - -
<0.1
<0.1
<0.1
<0.1
 - -
- Imazaquine (?g/L), Fomesafen (?g/L), mepiquat (?g/L), Fluazifop-butyl (?g/L), Clopyralide (?g/L), Flufenoxuron (?g/L)
0.9
 - - - - -
<0.01
<0.01
<0.01
<0.02
 - -
- Trifloxystrobine (?g/L), HCH epsilon (?g/L)
0.9
 - - - - -
<0.001
<0.001
<0.001
<0.005
 - -
- Pyrethrine (?g/L)
0.9
 - - - - -
<0.08
<0.08
<0.08
<0.1
 - -
- asulame (?g/L), Pirimicarbe (?g/L)
0.9
 - - - - -
<0.005
<0.005
<0.005
<0.01
 - -
- Terbuthylazine hydroxy (?g/L), Hexythiazox (?g/L), 2-hydroxy atrazine (?g/L), Diflubenzuron (?g/L), 2,4,5-T (?g/L), Thiodicarbe (?g/L)
0.9
 - - - - -
<0.005
<0.005
<0.005
<0.02
 - -
- Oxyfluorfene (?g/L), DDE 44' (?g/L)
0.9
 - - - - -
<0.002
<0.002
<0.002
<0.002
 - -
- Naptalame (?g/L)
0.9
 - - - - -
<0.002
<0.002
<0.002
<0.03
 - -
- Irgarol (?g/L)
0.9
 - - - - -
<0.0005
<0.0005
<0.0005
<0.0005
 - -
- Imazamethabenz-methyl (?g/L), Propachlore (?g/L)
0.9
 - - - - -
<0.002
<0.002
<0.002
<0.01
 - -
- Bupirimate (?g/L)
0.9
 - - - - -
<0.02
<0.02
<0.02
<0.01
 - -
- Coumaphos (?g/L), Disulfoton (?g/L), Trichlorfon (?g/L), Captane (?g/L)
0.9
 - - - - -
<0.05
<0.05
<0.05
<0.05
 - -
- Malathion (?g/L)
0.9
 - - - - -
<0.003
<0.003
<0.003
<0.003
 - -
- Isodrine (?g/L), DDT 44' (?g/L), DDT 24' (?g/L), DDE 24' (?g/L), DDD 44' (?g/L), DDD 24' (?g/L)
0.9
 - - - - -
<0.001
<0.001
<0.001
<0.001
 - -
- Dinoterbe (?g/L)
0.9
 - - - - -
<0.005
<0.005
<0.005
<0.03
 - -
- Dicofol (?g/L)
0.9
 - - - - -
<0.0003
<0.0003
<0.0003
<0.0005
 - -
- Demeton-S-Methyl (?g/L)
0.9
 - - - - -
<0.023
<0.023
<0.023
<0.02
 - -
- 2,4-DB (?g/L)
0.9
 - - - - -
<0.01
<0.01
<0.01
<0.05
 - -
- Isothiocyanate de methyle (?g/L), Quizalofop (?g/L), Thirame (?g/L)
0.9
 - - - - - - - -
<0.02
 - -
- Dichlorprop-P (?g/L), Mecoprop-P (?g/L)
0.9
 - -
<0.03
 - - - - - - - -
- Rotenone (?g/L)
0.9
 - - - - - - - -
<0.005
 - -
- fosetyl-aluminium (?g/L), Meptyldinocap (?g/L)
0.9
 - -
<0.05
 - - - - - - - -
- Endosulfan (?g/L), Heptachlore epoxyde (?g/L)
0.9
 - -
<0.01
 - - - - - - - -
- Tolylfluanide (?g/L)
0.9
 - -
<0.02
 - - - - - - - -
- Heptachlore epoxyde endo (?g/L)
0
 - -
<0.01
 - -
<0.01
<0.01
<0.01
<0.01
 - -
- Heptachlo epoxyde exo cis (?g/L), Heptachlore (?g/L)
0
 - -
<0.01
 - -
<0.005
<0.005
<0.005
<0.005
 - -
- Dieldrine (?g/L), Aldrine (?g/L)
0
 - -
<0.01
 - -
<0.001
<0.001
<0.001
<0.001
 - -
- Propamocarb (?g/L)
0
 - - - - -
<0.017
<0.017
<0.017
<0.017
 - -
- Dimethachlore CGA 50266 (?g/L)
0
 - - - - -
<0.005
<0.005
<0.005
<0.01
 - -
- Chloridazone methyl desph (?g/L)
0
 - - - - -
<0.02
<0.02
<0.02
<0.02
 - -
- Propylene thiouree (?g/L)
0
 - - - - -
<0.1
<0.1
<0.1
<0.5
 - -
- Prothioconazole (?g/L)
0.9
 - - - - -
<1
<1
<1
<1
 - -
- Ethephon (?g/L)
0.9
 - - - - -
<100
<100
<100
<100
 - -
- Tetrachlorobenzene (?g/L), Biphenyle (?g/L)
0
 - - - - -
<0.01
<0.01
<0.01
<0.01
 - -
- Pentachlorophenol (?g/L)
0
 - -
<0.05
 - - -
<0.02
 -
<0.03
 - -
- HCH alpha+beta+delta+gamm (?g/L)
0
 - -
<0.005
 - - - - - - - -
- Epichlorohydrine (?g/L)
0
 - - - - - - - -
<0.05
 - -
Moyenne des valeurs observées sur la période. Pour les mesures inférieures à la limite de quantification, en accord avec les textes réglementaires, la valeur prise en compte pour le calcul est égale à LQ/2

Les valeurs en italique indiquent le seuil de quantification lorsque aucune analyse n'a été quantifiée sur la période










Legende
Limite de quantification supérieure à la valeur seuil (ou absence de valeur seuil), état non évaluable
Autres cas :


Lim. Quanti
↓
0,5 VS
↓
0,75 VS
↓ 		Valeur seuil (VS)
↓










Attention, le graphique affiche des données mesurées sur les fractions eau brute et eau filtrée qui ne sont pas comparables pour tous les paramètres (métaux notamment). Vous pouvez n'afficher qu'une seule fraction dans le menu "choix du support"

Nitrates

Données statistiquesLe 14/06/16 27 mg(NO3)/LLe 13/03/19 29 mg(NO3)/LLe 20/06/19 27 mg(NO3)/LLe 18/09/19 26 mg(NO3)/LLe 20/11/19 25 mg(NO3)/LLe 17/03/20 27 mg(NO3)/LLe 04/06/20 26 mg(NO3)/LLe 08/09/20 27 mg(NO3)/LLe 05/11/20 26 mg(NO3)/LLe 09/03/21 26 mg(NO3)/LLe 28/05/21 27 mg(NO3)/LLe 24/09/21 28 mg(NO3)/LLe 26/11/21 29 mg(NO3)/LLe 24/01/22 30 mg(NO3)/LLe 13/10/22 24 mg(NO3)/LLe 01/03/23 24 mg(NO3)/LLe 31/07/23 24 mg(NO3)/LLe 07/09/23 25 mg(NO3)/LLe 08/12/23 23 mg(NO3)/L

Somme pesticides analyses (?g/L)

Données statistiquesLe 14/06/16 0.001 ?g/LLe 17/03/20 0.07 ?g/LLe 04/06/20 0.053 ?g/LLe 08/09/20 0.09 ?g/LLe 05/11/20 0.116 ?g/LLe 09/03/21 0.092 ?g/LLe 28/05/21 0.113 ?g/LLe 24/09/21 0.098 ?g/LLe 26/11/21 0.105 ?g/LLe 24/01/22 0.104 ?g/LLe 13/10/22 0.12 ?g/L

Atrazine desethyl (?g/L)

Données statistiquesLe 14/06/16 0.02 ?g/LLe 13/03/19 0.025 ?g/LLe 20/06/19 0.021 ?g/LLe 18/09/19 0.019 ?g/LLe 20/11/19 0.021 ?g/LLe 17/03/20 0.019 ?g/LLe 04/06/20 0.016 ?g/LLe 08/09/20 0.018 ?g/LLe 05/11/20 0.024 ?g/LLe 09/03/21 0.021 ?g/LLe 28/05/21 0.02 ?g/LLe 24/09/21 0.019 ?g/LLe 26/11/21 0.016 ?g/LLe 24/01/22 0.023 ?g/LLe 13/10/22 0.02 ?g/L

Atrazine (?g/L)

Données statistiquesLe 14/06/16 0.02 ?g/LLe 13/03/19 0.012 ?g/LLe 20/06/19 0.01 ?g/LLe 18/09/19 0.01 ?g/LLe 20/11/19 0.01 ?g/LLe 17/03/20 0.011 ?g/LLe 04/06/20 0.007 ?g/LLe 08/09/20 0.01 ?g/LLe 05/11/20 0.01 ?g/LLe 09/03/21 0.009 ?g/LLe 28/05/21 0.011 ?g/LLe 24/09/21 0.009 ?g/LLe 26/11/21 0.009 ?g/LLe 24/01/22 0.011 ?g/LLe 13/10/22 0.01 ?g/L

Atrazine deisopropyl dese (?g/L)

Données statistiquesLe 13/03/19 0.09 ?g/LLe 20/06/19 0.1 ?g/LLe 18/09/19 0.08 ?g/LLe 20/11/19 0.06 ?g/LLe 17/03/20 0.04 ?g/LLe 04/06/20 0.03 ?g/LLe 08/09/20 0.06 ?g/LLe 05/11/20 0.08 ?g/LLe 09/03/21 0.06 ?g/LLe 28/05/21 0.08 ?g/LLe 24/09/21 0.07 ?g/LLe 26/11/21 0.08 ?g/LLe 24/01/22 0.07 ?g/LLe 13/10/22 0.059 ?g/L

Simazine (?g/L)

Données statistiquesLe 14/06/16 0.02 ?g/LLe 13/03/19 0.002 ?g/LLe 18/09/19 0.002 ?g/LLe 20/11/19 0.002 ?g/LLe 17/03/20 0.002 ?g/LLe 04/06/20 0.002 ?g/LLe 08/09/20 0.002 ?g/LLe 05/11/20 0.002 ?g/LLe 09/03/21 0.002 ?g/LLe 28/05/21 0.002 ?g/LLe 24/09/21 0.002 ?g/LLe 26/11/21 0.002 ?g/LLe 24/01/22 0.002 ?g/LLe 13/10/22 0.005 ?g/L