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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.15 ● (Near the limit) 0.2 – 1 0.003 ▲ Total Chlorinemg CL2/l 0.2 No limit 0.04
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 21 No limit 21 Hardnessmg CaCO3/l 325 80 – 459 325 Hardness fF 32.5 No limit 32.5 pH 7.6 6.5 – 9.5 7.6 TurbidityNTU 0.2 ≤ 4 0.02 ConductivityμS / cm 579 ≤ 2,500 579 TDSmg/l 370.6estimated 0 – 1,199 370.6 Alkalinitymg CaCO3/l 246 No limit 246 Bicarbonatemg HCO3/l 298Sampled Feb 2025 No limit 298
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Sept 2025 ≤ 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 2025 ≤ 50 0.5 Fluoridemg F/l 0.052Sampled Feb 2025 ≤ 1.5 0.016 Mercuryμg Hg/l 0.05Sampled Feb 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 9.8 ≤ 50 2.94
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 4.7Sampled Feb 2025 No limit 4.7 Calciummg/l 110Sampled Feb 2025 No limit 110 Potassiummg/l 2Sampled Feb 2025 No limit 2 Chloridemg/l 17 ≤ 250 17
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Feb 2025 ≤ 200 2 Antimonyμg/l 0.5Sampled Jul 2025 ≤ 5 0.5 Arsenicμg/l 4.2Sampled Feb 2025 ≤ 10 2.1 Bariumμg/l 1Sampled Feb 2025 ≤ 1,000 1 Cadmiumμg/l 0.025Sampled Jul 2025 ≤ 5 0.025 Chromiumμg/l 1Sampled Jul 2025 ≤ 50 1 Ironμg/l 7Sampled Jul 2025 ≤ 200 7 Manganeseμg/l 1Sampled Feb 2025 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 0.5Sampled Feb 2025 ≤ 10 0.5 Sodiummg/l 7.3Sampled Feb 2025 ≤ 200 7.3
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Feb 2025 No limit 0.003 Total Trihalomethanesμg/l 0.34Sampled Feb 2025 ≤ 100 0.017
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Feb 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.054Sampled Feb 2025 ≤ 0.5 0.054
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Feb 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Feb 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Feb 2025 No limit 0.002 PFOSug/L 0.001Sampled Feb 2025 No limit 0.001 PFNAug/L 0.001Sampled Feb 2025 No limit 0.001 Total PFASug/L 0Sampled Feb 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 0.05 No limit 0.015 Sulfatemg/l 28 No limit 28
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.
