Votre eau est potable, mais un ou plusieurs paramètres méritent une attention particulière.
Référence de qualité non respectée : Température. Ces références sont des indicateurs du bon fonctionnement des installations (goût, aspect, corrosion, efficacité du traitement), sans risque direct pour la santé.
Analyse du 11/08/2026 · SUEZ · Réseau 060000815
L'eau du robinet à Le Mesnil-en-Thelle en bref
La dernière analyse de l'eau du robinet à Le Mesnil-en-Thelle, réalisée le 11/08/2026 (distributeur : SUEZ), montre une eau potable, avec toutefois un point de vigilance. Sur les 12 derniers mois analysés (depuis septembre 2025), on compte 8 conformes, 2 avec un point de vigilance et 2 non conformes. La teneur en nitrates est modérée (29,3 mg/L pour une limite de 50 mg/L). Parmi les autres paramètres réglementés, le plus proche de sa limite est Somme de 20 substances perfluoroalkylées (PFAS) (pire individuel) (27 % de la limite). Dans le département Oise (60), 89 % 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 | Présence | 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 | 0 |
| Coliformes (n/(100mL)) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 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) | 29,3 | 36,7 | 30 | 29,7 | 24,8 | 31,4 | 34 | 34,7 | 32,8 | – | – | 29,4 | – | 31,3 | 30,1 | – | – | 29,2 | 25,2 | 24,5 | 25,7 | 23,9 | – | 25,4 | – | 32 | 31,6 | – | – | 22,7 | – | 24,1 | – | 21,8 | – | 17,6 | – | 32,5 | 22,9 | 23,1 | – | 23,4 | – | 21,8 | – | 23,6 | 23,3 | – | 25,7 | 24 | 20,7 | – | 20,9 | – | 27,8 | 26,6 | 25,3 | 27,7 | 23,7 | 26,4 | 19,8 | 29,6 | 31,4 | 23,6 | 23,4 | 26,2 |
| Nitrites (mg/L) | 0 | 0 | 0 | 0 | 0 | 0 | 0,702 | 0 | 0 | – | – | 0 | – | 0,637 | 0 | – | – | 0 | 0 | 0 | 0,058 | 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 | 0 | 0 | 0 | 0 | 0 | 0,88 | 0 | 0 | – | – | 0 | – | 0,76 | 0 | – | – | 0 | – | – | 0,53 | – | – | 0 | – | – | 0 | – | – | 0 | – | – | – | 0 | – | 0 | – | 0 | – | 0 | – | 0 | – | – | – | 0 | 0 | – | 0 | – | 0 | – | 0 | – | – | – | – | – | – | – | – | – | 0 | – | 0 | 0 |
| Ammonium (mg/L) | 0 | 0 | 0 | 0 | 0,051 | 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) | 7,1 | 7,1 | 7 | 7,2 | 7,5 | 7,6 | 7,4 | 7,7 | 7,6 | 7,8 | 7,6 | 7,4 | 7,8 | 7,5 | 7,6 | 7,7 | 8 | 7,8 | 7,6 | 7,5 | 7,2 | 7,4 | 7,1 | 7,2 | 7,5 | 8 | 7,8 | 7,3 | 7,9 | 7,6 | 7,6 | 8 | 8 | 7,7 | 7,3 | 7,2 | 7,8 | 7,8 | 7,7 | 7,7 | 7,7 | 7,8 | 7,8 | 7,9 | 7,9 | 7,7 | 7,6 | 7,7 | 7,4 | 8 | 7,7 | 7,9 | 7,6 | 7,4 | 8 | 7,6 | 7,6 | 7,7 | 7,4 | 7,7 | 7,5 | 7,9 | 7,7 | 7,7 | 7,5 | 7,9 |
| Turbidité (NFU) | 0,39 | 0 | 0,3 | 0,32 | 0,52 | 3 | 0,9 | 2,8 | 1,6 | 0,65 | 0,34 | 0 | 0 | 0,37 | 0 | 0 | 0 | 0,32 | 0 | 0 | 0 | 0 | 0 | 0 | 0,35 | 0 | 0 | 0,41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,34 | 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 |
| Conductivité (µS/cm) | 700 | 710 | 705 | 705 | 700 | 735 | 735 | 465 | 475 | 430 | 455 | 575 | 490 | 465 | 440 | 470 | 490 | 490 | 520 | 675 | 700 | 705 | 690 | 695 | 700 | 460 | 455 | 695 | 515 | 515 | 505 | 500 | 480 | 465 | 685 | 680 | 475 | 510 | 480 | 495 | 550 | 440 | 465 | 505 | 500 | 495 | 510 | 495 | 450 | 460 | 460 | 485 | 465 | 430 | 445 | 480 | 430 | 450 | 430 | 425 | 465 | 450 | 470 | 475 | 705 | 480 |
| Température (°C) | 26 | 23 | 23 | 18 | 16 | 13 | 15 | 12 | 13 | 15 | 17 | 22 | 23 | 24 | 24 | 15 | 12 | 15 | 9 | 10 | 13 | 13 | 16 | 22 | 25 | 21 | 19 | 18 | 13 | 13 | 10 | 12 | 11 | 15 | 19 | 24 | 22 | 23 | 24 | 16 | 13 | 13 | 9 | 11 | 11 | 14 | 23 | 25 | 23 | 22 | 20 | 14 | 13 | 12 | 11 | 13 | 16 | 22 | 21 | 20 | 19 | 14 | 13 | 11 | 13 | 13 |
| Carbone organique (mg(C)/L) | 0,4 | 0,42 | 0,39 | 0,39 | 0,65 | 0,97 | 0,92 | 1,85 | 1,14 | – | – | 0,79 | – | 0,57 | 0,48 | – | – | 0,41 | – | – | 0,28 | – | – | 0,32 | – | – | 0,42 | – | – | 0,39 | – | – | – | 0,38 | – | 0,41 | – | 0,39 | – | 0,38 | – | 0,43 | – | – | – | 0,42 | 0,45 | – | 0,46 | – | 0,42 | – | 0,42 | – | – | – | – | – | – | – | – | – | 0,52 | – | 0,48 | 0,43 |
| Désinfection | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Chlore résiduel (mg(Cl2)/L) | 0,64 | 0,61 | 0,44 | 0,81 | 1,01 | 2,23 | 0,64 | 0,92 | 1,13 | 0,41 | 0,77 | 1,34 | 0,55 | 1,56 | 0,55 | 0,89 | 0,57 | 0,89 | 1,27 | 0,93 | 0,44 | 0,5 | 0,54 | 0,65 | 0,35 | 0,44 | 0,59 | 0,6 | 0,53 | 0,73 | 0,7 | 0,6 | 0,57 | 0,64 | 0,32 | 0,65 | 0,34 | 0,62 | 0,44 | 0,61 | 0,46 | 0,68 | 0,56 | 0,54 | 0,45 | 0,79 | 0,57 | 0,58 | 0,52 | 0,45 | 0,6 | 0,45 | 0,64 | 0,74 | 0,6 | 0,4 | 0,42 | 0,34 | 0,22 | 0,54 | 0,22 | 0,29 | 0,54 | 0,41 | 0,54 | 0,51 |
| Chlore total (mg(Cl2)/L) | 0,66 | 0,71 | 0,52 | 0,86 | 0,35 | 0,24 | 0,53 | 0,69 | 1,18 | 0,25 | 0,83 | 1,39 | 0,62 | 1,59 | 0,31 | 0,91 | 0,66 | 0,7 | 1,37 | 0,82 | 0 | 0,54 | 0,58 | 0,6 | 0,4 | 0,35 | 0,6 | 0,4 | 0,39 | 0,74 | 0,57 | 0,58 | 0,54 | 0,65 | 0,35 | 0,66 | 0,38 | 0,58 | 0,47 | 0,62 | 0,29 | 0,5 | 0,59 | 0,45 | 0,47 | 0,59 | 0,58 | 0,63 | 0,6 | 0,24 | 0,62 | 0,43 | 0,65 | 0,75 | 0,51 | 0,34 | 0,42 | 0,23 | 0,31 | 0,31 | 0,24 | 0,3 | 0,37 | 0,43 | 0,56 | 0,31 |
| Trihalométhanes (µg/L) | 13,1 | 6,5 | – | 0 | 25,9 | 22,4 | 0 | 9,7 | – | – | – | 16,7 | – | 21,9 | 1,6 | – | – | 1,7 | 5,7 | 2,9 | – | 1,6 | – | – | – | 12,9 | 2,3 | – | – | 1,2 | – | 6,4 | – | 4,7 | – | 1,1 | – | – | 5,3 | 1,3 | – | – | – | 9 | – | 9,2 | 2,5 | – | – | 14,2 | 1,1 | – | – | – | 7,9 | – | – | – | – | – | 5,1 | – | – | – | 2,7 | – |
| Acides haloacétiques (µg/L) | – | – | – | – | – | 8 | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Métaux | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Plomb (µg/L) | – | – | 1 | – | – | 5 | 0 | – | – | – | – | 3,3 | – | 0,9 | – | – | – | – | 5,6 | 0,6 | – | 0,7 | – | – | – | 1 | – | – | – | – | – | 0 | – | – | – | – | – | – | 2,7 | – | – | – | – | 2,1 | – | 0,6 | – | – | – | 2,3 | – | – | – | – | 3,8 | – | – | – | – | – | 2 | – | – | – | – | – |
| Nickel (µg/L) | – | – | – | – | – | 5,1 | 0 | – | – | – | – | 0 | – | 1 | – | – | – | – | 0,9 | 0,6 | – | 1,5 | – | – | – | 0,7 | – | – | – | – | – | 0 | – | 2,2 | – | – | – | – | 0,9 | – | – | – | – | 1,4 | – | 0,7 | – | – | – | 0,7 | – | – | – | – | 0,9 | – | – | – | – | – | 6,4 | – | – | – | – | – |
| Cuivre (mg(Cu)/L) | – | – | – | – | – | 0,11 | 0 | – | – | – | – | 0,026 | – | 0,019 | – | – | – | – | 0,05 | 0,07 | – | 0,022 | – | – | – | 0,024 | – | – | – | – | – | 0 | – | 0,34 | – | – | – | – | 0,07 | – | – | – | – | 0,03 | – | 0,05 | – | – | – | 0,04 | – | – | – | – | 0,05 | – | – | – | – | – | 0,06 | – | – | – | – | – |
| Cadmium (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | 0 | – | 0 | – | – | – | 0 | – | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | – | – | – | – | 0 | – | 0 | – | – | – | 0 | – | – | – | – | 0 | – | – | – | – | – | 0 | – | – | – | – | – |
| Chrome (µg/L) | – | – | – | – | – | 0 | 0,6 | – | – | – | – | 0,9 | – | 0,8 | – | – | – | – | 0 | 0 | – | 0 | – | – | – | 0,7 | – | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | – | – | – | – | 0,5 | – | 0,6 | – | – | – | 0,6 | – | – | – | – | 0,8 | – | – | – | – | – | 0 | – | – | – | – | – |
| Antimoine (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | 0 | – | 0 | – | – | – | 0 | – | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | – | – | – | – | 0 | – | 0 | – | – | – | 0 | – | – | – | – | 0 | – | – | – | – | – | 0 | – | – | – | – | – |
| Fer (µg/L) | – | – | – | – | 19,2 | 574 | 78 | – | – | – | – | 116 | – | 67 | 73 | – | – | 75 | 85 | 18,2 | – | 30,2 | – | – | – | 16,9 | 43,1 | – | – | 0 | – | 14,2 | – | 19,9 | – | 24,5 | – | – | 27,5 | 29,2 | – | – | – | 25,2 | – | 37 | 34,2 | – | – | 25,7 | 42,9 | – | – | – | 13,9 | – | – | – | – | – | 37 | – | – | – | 34,5 | – |
| Pesticides | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Somme de 20 substances perfluoroalkylées (PFAS) (pire individuel) (µg/L) | 0,027 | – | 0,015 | 0,037 | – | 1,253 | 0,482 | – | 0,051 | – | 0,064 | 0,227 | – | 0 | 0,161 | 0,031 | – | 0,127 | 0 | 0 | 0 | 0 | – | 0,259 | 0,074 | 0 | 0,463 | – | – | 0,894 | – | 0 | – | 0,786 | – | 0,614 | – | 0,212 | 0 | 0,341 | – | – | – | 0 | – | 0 | 0,105 | – | – | 0 | 0,153 | – | – | – | 0 | – | – | – | – | – | 0 | – | – | – | 0,304 | – |
| Glyphosate (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | – | 0 | – | – | 0 | – | – | – | – | – | – | – | – | 0 | – | – | 0 | – | – | – | 0 | – | 0 | – | – | – | 0 | – | – | – | – | – | – | 0 | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0 | – |
| AMPA (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Dalapon (µg/L) | – | – | – | – | – | 0,845 | 0 | – | – | – | – | 0,05 | – | – | 0 | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Glufosinate (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | – | 0 | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Fosetyl (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | – | 0 | – | – | 0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Métolachlore (pire individuel) (µg/L) | – | – | 0,015 | – | – | – | 0,169 | – | – | – | – | 0,049 | – | – | 0,06 | – | – | 0,041 | – | – | – | – | – | 0,1 | – | – | 0,181 | – | – | 0,486 | – | – | – | 0,355 | – | 0,279 | – | 0,177 | – | 0,119 | – | – | – | – | – | – | 0,057 | – | – | – | 0,064 | – | – | – | – | – | – | – | – | – | – | – | – | – | 0,093 | – |
| HAP | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Benzo(a)pyrène (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | 0 | – | 0 | – | – | – | 0 | – | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | – | – | – | – | 0 | – | 0 | – | – | – | 0 | – | – | – | – | 0 | – | – | – | – | – | 0 | – | – | – | – | – |
| HAP (4 subst.) (µg/L) | – | – | – | – | – | 0 | 0 | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | 0 | – | 0 | – | – | – | 0 | – | – | – | – | – | 0 | – | 0 | – | – | – | – | 0 | – | – | – | – | 0 | – | 0 | – | – | – | 0 | – | – | – | – | 0 | – | – | – | – | – | 0 | – | – | – | – | – |