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SIAEP MAILLET
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.12 ● (Near the limit) 0.2 – 1 0.002 ▲ Total Chlorinemg CL2/l 0.15 No limit 0.03
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24 No limit 24 Hardnessmg CaCO3/l 237 80 – 459 237 Hardness fF 23.7 No limit 23.7 pH 7.5 6.5 – 9.5 7.5 TurbidityNTU 0.39 ≤ 4 0.039 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 471Sampled Nov 2025 ≤ 2,500 471 TDSmg/l 301.4Sampled Nov 2025 estimated 0 – 1,199 301.4 Alkalinitymg CaCO3/l 261 No limit 261 Bicarbonatemg HCO3/l 292Sampled Oct 2025 No limit 292
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 5Sampled Oct 2025 ≤ 50 0.25 Fluoridemg F/l 0.22Sampled Oct 2025 ≤ 1.5 0.065 Mercuryμg Hg/l 0.015Sampled Oct 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 5.9 ≤ 50 1.77
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 22.2Sampled Oct 2025 No limit 22.2 Calciummg/l 55.5Sampled Oct 2025 No limit 55.5 Potassiummg/l 3.8Sampled Oct 2025 No limit 3.8 Chloridemg/l 11.9 ≤ 250 11.9
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Oct 2025 ≤ 200 2 Antimonyμg/l 0.2Sampled Mar 2025 ≤ 5 0.2 Arsenicμg/l 4.3Sampled Oct 2025 ≤ 10 2.15 Bariumμg/l 76Sampled Oct 2025 ≤ 1,000 76 Cadmiumμg/l 0.055Sampled Mar 2025 ≤ 5 0.055 Chromiumμg/l 0.6Sampled Mar 2025 ≤ 50 0.6 Ironμg/l 7 ≤ 200 7 Manganeseμg/l 1Sampled Oct 2025 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2.5Sampled Oct 2025 ≤ 10 2.5 Sodiummg/l 8.1Sampled Oct 2025 ≤ 200 8.1
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Oct 2025 No limit 0.005
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.001Sampled Oct 2025 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Oct 2025 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Oct 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Oct 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Oct 2025 No limit 0.001 PFOSug/L 0.002Sampled Oct 2025 No limit 0.002 PFNAug/L 0.001Sampled Oct 2025 No limit 0.001 Total PFASug/L 0Sampled Oct 2025 ≤ 0.1 0 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 Sulfatemg/l 20.5 No limit 20.5
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.
