← Back to summary See all parameters SYNDICAT DE NORD-ECOUEN · Attainville
CEG
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.34 0.2 – 1 0.007 ▲ Total Chlorinemg CL2/l 0.42 No limit 0.084
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 14.2 No limit 14.2 Hardnessmg CaCO3/l 237.9 80 – 459 237.9 Hardness fF 23.8 No limit 23.8 pH 7.9 6.5 – 9.5 7.9 TurbidityNTU 0.1 ≤ 4 0.01 ConductivityμS / cm 557 ≤ 2,500 557 TDSmg/l 356.5estimated 0 – 1,199 356.5 Alkalinitymg CaCO3/l 190.5 No limit 190.5 Bicarbonatemg HCO3/l 312Sampled Dec 2025 No limit 312
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0 ≤ 0 0 eColiUFC/100ml 0 ≤ 0 0 BacteriasNMP/100ml 0 ≤ 0 0 EnterococcusUFC/100ml 0 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 10Sampled Feb 2026 ≤ 50 0.5 Fluoridemg F/l 0.51Sampled Feb 2026 ≤ 1.5 0.15 Mercuryμg Hg/l 0.5Sampled Feb 2026 ≤ 1 0.05 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 20.7 ≤ 50 6.21
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 5.8 No limit 5.8 Calciummg/l 114.6Sampled Feb 2026 No limit 114.6 Potassiummg/l 1.4Sampled Feb 2026 No limit 1.4 Chloridemg/l 28 ≤ 250 28
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 19 ≤ 200 19 Antimonyμg/l 1Sampled Feb 2026 ≤ 5 1 Arsenicμg/l 2Sampled Feb 2026 ≤ 10 1 Bariumμg/l 69Sampled Feb 2026 ≤ 1,000 69 Cadmiumμg/l 1Sampled Feb 2026 ≤ 5 1 Chromiumμg/l 5Sampled Feb 2026 ≤ 50 5 Ironμg/l 10 ≤ 200 10 Manganeseμg/l 10 ≤ 50 10 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Feb 2026 ≤ 10 2 Sodiummg/l 12.9Sampled Feb 2026 ≤ 200 12.9
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Feb 2026 No limit 0.005 Total Trihalomethanesμg/l 52.2 ≤ 100 2.61
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 0.5Sampled Feb 2026 ≤ 60 0.025
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Total pesticidesug/L 0.5 ● (Near the limit) Sampled Feb 2026 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Feb 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Feb 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Feb 2026 No limit 0.001 PFOSug/L 0.001Sampled Feb 2026 No limit 0.001 PFNAug/L 0.001Sampled Feb 2026 No limit 0.001 Total PFASug/L 0.029Sampled Feb 2026 ≤ 0.1 0.003 PFAS 4ng/l Not reported No limit — PFAS 21ng/l Not reported No limit —
Other Other Parameter Unfiltered tap water Allowed range Filtered Ammoniamg/l 0.01 No limit 0.003 Perchlorateug/L 0.35Sampled Mar 2026 No limit 0.35 Sulfatemg/l 36.4 No limit 36.4 Uraniumug/L 10Sampled Feb 2026 No limit 10
Data from the French health inspection of drinking water (Ministry of Health, regional health agencies), per distribution unit. Quality ranges are based on WHO guidelines, EU Directive 2020/2184 and the French public health code.
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Data from the French health inspection of drinking water (Ministry of Health, regional health agencies), per distribution unit. Quality ranges are based on WHO guidelines, EU Directive 2020/2184 and the French public health code.
