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S E A O
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.36 0.2 – 1 0.007 ▲ Total Chlorinemg CL2/l 0.39 No limit 0.078
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 22 No limit 22 Hardnessmg CaCO3/l 281 80 – 459 281 Hardness fF 28.1 No limit 28.1 pH 7.8 6.5 – 9.5 7.8 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 590 ≤ 2,500 590 TDSmg/l 377.6estimated 0 – 1,199 377.6 Alkalinitymg CaCO3/l 268 No limit 268 Bicarbonatemg HCO3/l 327 No limit 327
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered 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 Dec 2025 ≤ 50 0.5 Fluoridemg F/l 0.15Sampled Dec 2025 ≤ 1.5 0.044 Mercuryμg Hg/l 0.015Sampled Dec 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 23.9 ≤ 50 7.17
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 2.9 No limit 2.9 Calciummg/l 108 No limit 108 Potassiummg/l 2Sampled Dec 2025 No limit 2 Chloridemg/l 17 ≤ 250 17
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Dec 2025 ≤ 200 10 Antimonyμg/l 0.5Sampled Sept 2025 ≤ 5 0.5 Arsenicμg/l 0.5Sampled Dec 2025 ≤ 10 0.25 Bariumμg/l 20Sampled Dec 2025 ≤ 1,000 20 Cadmiumμg/l 0.5Sampled Sept 2025 ≤ 5 0.5 Chromiumμg/l 0.5Sampled Sept 2025 ≤ 50 0.5 Copperμg/l 48Sampled Sept 2025 ≤ 2,000 2.4 Ironμg/l 5Sampled Dec 2025 ≤ 200 5 Manganeseμg/l 0.5Sampled Dec 2025 ≤ 50 0.5 Leadμg/l 1.2Sampled Sept 2025 ≤ 10 0.06 Nickelμg/l 0.5Sampled Sept 2025 ≤ 20 0.5 Seleniumμg/l 0.6Sampled Dec 2025 ≤ 10 0.6 Sodiummg/l 8.4Sampled Dec 2025 ≤ 200 8.4
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 1Sampled Dec 2025 No limit 0.05 Total Trihalomethanesμg/l 11.6Sampled May 2026 ≤ 100 0.58
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Total pesticidesug/L 0.16Sampled Dec 2025 ≤ 0.5 0.16
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Dec 2025 ≤ 70 0.02 Atrazineug/L 0.006Sampled Dec 2025 ≤ 3 0.006
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Jul 2025 No limit 0.001 PFOSug/L 0.001Sampled Jul 2025 No limit 0.001 PFNAug/L 0.001Sampled Jul 2025 No limit 0.001 Total PFASug/L 0.029Sampled Jul 2025 ≤ 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 0.05 No limit 0.015 Perchlorateug/L 2.5Sampled Jan 2026 No limit 2.5 Sulfatemg/l 6.6 No limit 6.6
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.
