Votre eau est potable, mais un ou plusieurs paramètres méritent une attention particulière.
Valeur proche de la limite réglementaire : Nitrates (87 % de la limite), Nitrates + Nitrites (87 % de la limite).
Analyse du 21/08/2026 · SIDEN-SIAN NOREADE AVESNELLES · Réseau 059000448
L'eau du robinet à Mairieux en bref
La dernière analyse de l'eau du robinet à Mairieux, réalisée le 21/08/2026 (distributeur : SIDEN-SIAN NOREADE AVESNELLES), montre une eau potable, avec toutefois un point de vigilance. Sur les 12 derniers mois analysés (depuis juillet 2025), on compte 2 conformes, 7 avec un point de vigilance et 3 non conformes. La teneur en nitrates est élevée, proche de la limite (43,6 mg/L pour une limite de 50 mg/L). Parmi les autres paramètres réglementés, le plus proche de sa limite est Nitrates + Nitrites (87 % de la limite). Dans le département Nord (59), 80 % des communes ont une eau conforme aux limites réglementaires lors du dernier contrôle.
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| Bactériologie | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Escherichia coli (n/(100mL)) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Entérocoques (n/(100mL)) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Coliformes (n/(100mL)) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Inorganiques | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrates (mg/L) | 43,6 | 43,2 | 41,35 | 40,7 | 40,6 | 40 | 42 | 40 | – | 41 | 43 | – | – | 37 | – | – | 26 | – | 31 | – | 33 | – | – | – | 31 | – | – | 31 | 32 | – | – | – | 39 | – | 35 | – | – | – | – | 38 | 35 | – | – | 41 | – | 40 | – | – | 36 | 37 | – | 34 | – | – | 32 | – | 35 | 33 | – | – | – | – | 30 | 29 | 28 |
| Nitrites (mg/L) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | – | – | 0 | – | – | 0 | – | – | 0 | – | 0 | – | 0 | – | – | – | 0 | – | – | 0 | 0 | – | – | – | 0 | – | 0 | – | – | – | – | 0 | 0 | – | – | 0 | – | 0 | – | – | 0 | 0 | – | 0 | – | – | 0 | – | 0 | 0 | – | – | – | 0 | 0 | 0 | 0 |
| Nitrates + Nitrites (mg/L) | 0,87 | 0,86 | 0,83 | 0,81 | 0,81 | 0,8 | 0,84 | 0,8 | – | – | 0,86 | – | – | 0,74 | – | – | – | – | 0,62 | – | – | – | – | – | 0,62 | – | – | 0,62 | – | – | – | – | 0,76 | – | 0,7 | – | – | – | – | – | 0,7 | – | – | 0,82 | – | – | – | – | – | 0,74 | – | 0,68 | – | – | – | – | 0,7 | 0,66 | – | – | – | – | – | 0,58 | – |
| Ammonium (mg/L) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| pH (unité pH) | 7,2 | 7,2 | 7,6 | 7,8 | 7,5 | 7,7 | 7,3 | 7,3 | 7,5 | 7,2 | 7,4 | 7,7 | 7,5 | 7,3 | 7,6 | 7,3 | 7,3 | 7,3 | 7,3 | 7,2 | 7,6 | 7,5 | 7,6 | 7,2 | 7,5 | 7,8 | 7,1 | 7,5 | 7,6 | 7,7 | 7,7 | 7,6 | 7,3 | 7,7 | 7,2 | 7,7 | 7,5 | 7,8 | 7,7 | 7,8 | 7,4 | 7,5 | 7,6 | 7,6 | 7,3 | 7,4 | 7,4 | 7 | 7,5 | 7,7 | 7,7 | 7,7 | 7,4 | 7,4 | 7,7 | 7,3 | 7,6 | 7,2 | 7,5 | 7,6 | 7,1 | 7,5 | 7,5 | 7,7 | 7,3 |
| Turbidité (NFU) | 0 | 0,21 | 0,11 | 0 | 0,12 | 0 | 0 | 0,15 | 0,23 | 0,11 | 0,27 | 0,11 | 0,27 | 0 | 0,11 | 0,1 | 0,12 | 0 | 0 | 0,18 | 0,72 | 0,17 | 0,19 | 0 | 0,37 | 0 | 0,13 | 0 | 0 | 0,36 | 0,12 | 0,84 | 0 | 0 | 0,45 | 0 | 0,14 | 0 | 0 | 0,1 | 0,14 | 0 | 0,13 | 0,25 | 0,22 | 0,1 | 0 | 0,99 | 0 | 0,11 | 0 | 0,1 | 3,1 | 0 | 0,24 | 0,14 | 0 | 0 | 0,22 | 0 | 0,22 | 0,25 | 0,15 | 0 | 0,12 |
| Conductivité (µS/cm) | 720 | 698 | 712 | 707 | 702 | 711 | 710 | 707 | 706 | 704 | 705 | 698 | 709 | 694 | 686 | 686 | 684 | 687 | 687 | 697 | 683 | 687 | 688 | 676 | 675 | 678 | 684 | 680 | 679 | 683 | 689 | 711 | 723 | 715 | 711 | 700 | 709 | 688 | 691 | 765 | 699 | 700 | 709 | 712 | 708 | 711 | 706 | 706 | 698 | 698 | 687 | 679 | 677 | 700 | 677 | 692 | 694 | 670 | 690 | 726 | 690 | 682 | 681 | 681 | 679 |
| Température (°C) | 11,6 | 17 | 13,8 | 11,4 | 11,4 | 7,9 | 10 | 13,8 | 16,4 | 14,6 | 18,4 | 19,5 | 18,9 | 17,1 | 11,2 | 10,7 | 8,7 | 10,1 | 10,2 | 12,4 | 13,7 | 20,6 | 18,9 | 15,5 | 17,9 | 17 | 12,8 | 12 | 9,3 | 11,3 | 12,2 | 13,5 | 16,3 | 17,8 | 19,1 | 18,2 | 16,7 | 12,5 | 16,4 | 7,9 | 10,6 | 9,1 | 6,9 | 12,9 | 14,6 | 15,2 | 21,5 | 19,5 | 17,7 | 15,5 | 8,8 | 10,1 | 9,8 | 9,9 | 8,7 | 10,4 | 15,6 | 19 | 19,8 | 19,5 | 12,5 | 12,6 | 9,4 | 10,2 | 10 |
| Carbone organique (mg(C)/L) | 0,4 | 0,47 | 0,31 | 0,62 | 0,49 | 0,41 | 0,4 | 0,46 | – | – | 0,28 | – | – | 0,53 | – | – | – | – | 0,42 | – | – | – | – | – | 0,3 | – | – | 0,48 | – | – | – | – | 0,49 | – | 0,51 | – | – | – | – | – | 0,42 | – | – | 0,43 | – | – | – | – | – | 0,44 | – | 0,33 | – | – | – | – | 0,36 | 0,32 | – | – | – | – | – | 0,3 | – |
| Désinfection | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Chlore résiduel (mg(Cl2)/L) | 0,52 | 0,34 | 0,44 | 0,55 | 0,63 | 0,42 | 0,4 | 0,55 | 0,11 | 0,54 | 0,58 | 0,26 | 0,26 | 0,58 | 0,18 | 0,52 | 0,24 | 0,57 | 0,49 | 0,11 | 0,41 | 0,25 | 0,11 | 0,49 | 0,57 | 0,41 | 0,06 | 0,48 | 0,27 | 0,3 | 0,32 | 0,11 | 0,57 | 0,29 | 0,54 | 0,31 | 0,19 | 0,17 | 0,32 | 0,41 | 0,47 | 0,18 | 0,37 | 0,48 | 0,48 | 0,35 | 0,09 | 0,11 | 0,42 | 0,54 | 0,31 | 0,45 | 0,3 | 0,36 | 0,27 | 0,52 | 0,5 | 0,44 | 0,33 | 0,16 | 0,07 | 0,43 | 0,44 | 0,47 | 0,6 |
| Chlore total (mg(Cl2)/L) | 0,57 | 0,37 | 0,47 | 0,62 | 0,67 | 0,45 | 0,43 | 0,6 | 0,09 | 0,58 | 0,61 | 0,29 | 0,29 | 0,63 | 0,22 | 0,58 | 0,29 | 0,62 | 0,56 | 0,14 | 0,45 | 0,29 | 0,17 | 0,43 | 0,31 | 0,45 | 0,08 | 0,23 | 0,28 | 0,35 | 0,36 | 0,18 | 0,61 | 0,32 | 0,37 | 0,36 | 0,22 | 0,32 | 0,49 | 0,48 | 0,44 | 0,23 | 0,41 | 0,47 | 0,54 | 0,39 | 0,14 | 0,14 | 0,46 | 0,37 | 0,35 | 0,28 | 0,36 | 0,43 | 0,33 | 0,23 | 0,38 | 0,3 | 0,32 | 0,22 | 0,12 | 0,49 | 0,48 | 0,41 | 0,65 |
| Trihalométhanes (µg/L) | – | – | – | 9,16 | 4,97 | – | 3,64 | – | – | – | – | – | – | 3,67 | – | – | 3,67 | – | – | – | – | – | – | – | – | – | – | 1,86 | 6,24 | – | – | – | 6,7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 4,91 | 1,76 | – | – | – | – | – | – | 1,96 | – | – | – | – | – | 5,34 | – | – |
| Acides haloacétiques (µg/L) | – | – | – | – | – | – | 0,6 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Métaux | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Plomb (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 3 | – | – |
| Nickel (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – |
| Cuivre (mg(Cu)/L) | – | – | – | – | – | – | 0,04 | – | – | – | – | – | – | – | – | – | 0,014 | – | – | – | – | – | – | – | – | – | – | – | 0,011 | – | – | – | 0,114 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0,013 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0,132 | – | – |
| Cadmium (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – |
| Chrome (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – |
| Antimoine (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – |
| Fer (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | 0 | – | – | 71 | – | – | – | – | – | – | – | – | – | – | 0 | 16 | – | – | – | 0 | – | – | – | – | – | – | 0 | – | – | – | – | – | 13 | – | – | 0 | 0 | – | – | – | – | – | – | 0 | – | – | – | – | 0 | 11 | – | – |
| Pesticides | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Chlorothalonil R417888 (pire individuel) (µg/L) | – | 0,136 | – | – | 0,125 | – | 2,067 | – | – | – | – | – | – | 2,071 | – | – | 0,841 | 1,155 | – | – | – | 0,083 | – | 0 | – | – | 0,603 | 0,947 | 0 | – | – | 0,929 | 3,927 | – | 1,855 | – | – | – | – | – | 1,5 | – | – | 1,81 | 1,787 | – | – | – | 0 | 2,881 | 0,847 | – | – | – | – | 1,956 | 2,082 | – | 0,598 | – | – | 0,677 | 0,687 | – | – |
| Glyphosate (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | 0 | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | 0 | 0 | – | – | – | – | – | 0 | – | – | – | – | – | 0 | – | – |
| AMPA (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Dalapon (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | 0,038 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Glufosinate (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Fosetyl (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Chloridazone desphényl (pire individuel) (µg/L) | – | – | – | – | – | – | Présence | – | – | – | – | – | – | Présence | – | – | 0,686 | Présence | – | – | – | – | – | – | – | – | 0,57 | 0,797 | – | – | – | – | Présence | – | Présence | – | – | – | – | – | Présence | – | – | Présence | Présence | – | – | – | – | Présence | 0,452 | – | – | – | – | Présence | Présence | – | 0,379 | – | – | 0,29 | 0,33 | – | – |
| HAP | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Benzo(a)pyrène (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – |
| HAP (4 subst.) (µg/L) | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – | – |