Évolution mensuelle de la conformité

Réseaux de distribution (UDI)

BAS ROIZON 038002274
BERTRANDS 038002271
CREUX 038002275
FREYNET-HAUT ROIZON 038002272
LES TOUCHES 038003442
NANTES OUEST 038002270

Principaux paramètres analysés

Paramètre	Famille	Mesures	Moyenne	Maximum	Seuil
pH	Organoleptiques	317	7,740 unité pH	8,500 unité pH	—
Température de l'eau (DOM)	Organoleptiques	317	12,325 °C	24,300 °C	—
Conductivité à 25°C	Organoleptiques	317	363,107 µS/cm	758,000 µS/cm	—
Pluviométrie-48h	Autres	317	14,984 mm/48h	100,000 mm/48h	—
Température de l'air	Organoleptiques	317	12,189 °C	32,000 °C	—
Chlore libre	Désinfection	292	0,019 mg(Cl2)/L	0,520 mg(Cl2)/L	—
Chlore total	Désinfection	292	0,023 mg(Cl2)/L	0,560 mg(Cl2)/L	—
Escherichia coli /100ml - MF	Bactériologie	260	0,692 n/(100mL)	112,000 n/(100mL)	0,000 n/(100mL)
Bact. aér. revivifiables à 36°-44h	Autres	260	6,700 n/mL	300,000 n/mL	—
Entérocoques /100ml-MS	Bactériologie	260	0,388 n/(100mL)	51,000 n/(100mL)	0,000 n/(100mL)
Bactéries coliformes /100ml-MS	Bactériologie	260	2,400 n/(100mL)	280,000 n/(100mL)	—
Bact. aér. revivifiables à 22°-68h	Autres	259	14,073 n/mL	300,000 n/mL	—

⚠️ Dépassements de seuils détectés

Date	Paramètre	Valeur mesurée	Seuil	Dépassement
03/02/2026	Escherichia coli /100ml - MF	1,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
11/12/2025	Nitrates (en NO3)	74,000 mg/L	<=50 mg/L mg/L	+48%
18/11/2025	Escherichia coli /100ml - MF	1,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
21/10/2025	Escherichia coli /100ml - MF	1,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
02/10/2024	Escherichia coli /100ml - MF	8,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
02/10/2024	Entérocoques /100ml-MS	3,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
07/06/2024	Nickel	23,000 µg/L	20 µg/L	+15%
09/11/2023	Escherichia coli /100ml - MF	1,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
09/11/2023	Escherichia coli /100ml - MF	1,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
09/11/2023	Escherichia coli /100ml - MF	3,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
31/10/2023	Escherichia coli /100ml - MF	3,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
31/10/2023	Entérocoques /100ml-MS	5,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
31/10/2023	Escherichia coli /100ml - MF	8,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
31/10/2023	Entérocoques /100ml-MS	8,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Escherichia coli /100ml - MF	2,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Entérocoques /100ml-MS	6,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Escherichia coli /100ml - MF	22,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Entérocoques /100ml-MS	19,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Escherichia coli /100ml - MF	112,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Entérocoques /100ml-MS	51,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
30/08/2023	Escherichia coli /100ml - MF	3,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
20/06/2023	Escherichia coli /100ml - MF	5,000 n/(100mL)	<=0 n/(100mL) n/(100mL)	+—
12/10/2022	Escherichia coli /100ml - MF	3,000 n/(100mL)	0 n/(100mL)	+—
12/10/2022	Entérocoques /100ml-MS	1,000 n/(100mL)	0 n/(100mL)	+—
28/10/2021	Escherichia coli /100ml - MF	1,000 n/(100mL)	0 n/(100mL)	+—
31/08/2021	Turbidité néphélométrique NFU	3,100 NFU	1 NFU	+210%
03/06/2021	Turbidité néphélométrique NFU	3,300 NFU	1 NFU	+230%
16/02/2021	Escherichia coli /100ml - MF	1,000 n/(100mL)	0 n/(100mL)	+—
09/01/2020	Nitrates (en NO3)	66,500 mg/L	50 mg/L	+33%
11/12/2019	Nitrates (en NO3)	56,500 mg/L	50 mg/L	+13%

Derniers prélèvements

Date	Réseau	Finalité	Bactério	Chimique	Statut
09/02/2026	038002271	S1	OK	OK	Conforme
03/02/2026	038002270	CS	OK	OK	Conforme
03/02/2026	038002271	CS	NC	OK	À vérifier
03/02/2026	038002272	CS	OK	OK	Conforme
03/02/2026	038002274	CS	OK	OK	Conforme
03/02/2026	038002275	CS	OK	OK	Conforme
03/02/2026	038003442	CS	OK	OK	Conforme
07/01/2026	038002275	S1	—	OK	À vérifier
11/12/2025	038002275	CS	OK	NC	À vérifier
11/12/2025	038002270	CS	OK	OK	Conforme
11/12/2025	038002272		OK	OK	Conforme
24/11/2025	038002274	S1	OK	OK	Conforme
18/11/2025	038002275	CS	—	OK	À vérifier
18/11/2025	038002274	CS	NC	OK	À vérifier
30/10/2025	038002272	CS	OK	OK	Conforme
30/10/2025	038002271	S1	OK	OK	Conforme
21/10/2025	038002275	CS	—	OK	À vérifier
21/10/2025	038002270	CS	OK	OK	Conforme
21/10/2025	038002271	CS	NC	OK	À vérifier
21/10/2025	038003442	CS	OK	OK	Conforme
19/09/2025	038002275	CS	OK	OK	Conforme
21/08/2025	038002275	CS	—	OK	À vérifier
21/08/2025	038003442		OK	OK	Conforme
21/08/2025	038002272	CP	—	OK	À vérifier
21/08/2025	038002271		OK	OK	Conforme
21/08/2025	038002272	CS	OK	OK	Conforme
21/08/2025	038002270		OK	OK	Conforme
21/08/2025	038002274		OK	OK	Conforme
22/07/2025	038002275	CS	—	OK	À vérifier
12/06/2025	038002270	CS	OK	OK	Conforme