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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.22 0.2 – 1 0.004 ▲ Total Chlorinemg CL2/l 0.24 No limit 0.048
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24.1 No limit 24.1 Hardnessmg CaCO3/l 230.5 80 – 459 230.5 Hardness fF 23.1 No limit 23.1 pH 7.8 6.5 – 9.5 7.8 TurbidityNTU 0.1 ≤ 4 0.01 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 473 ≤ 2,500 473 TDSmg/l 302.7estimated 0 – 1,199 302.7 Alkalinitymg CaCO3/l 225 No limit 225
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 Nov 2025 ≤ 50 0.5 Fluoridemg F/l 0.05Sampled Nov 2025 ≤ 1.5 0.015 Mercuryμg Hg/l 0.01Sampled Nov 2025 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 25.2 ≤ 50 7.56
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 1.9Sampled Nov 2025 No limit 1.9 Calciummg/l 91.9Sampled Nov 2025 No limit 91.9 Potassiummg/l 0.7Sampled Nov 2025 No limit 0.7 Chloridemg/l 11.4 ≤ 250 11.4
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Nov 2025 ≤ 200 10 Antimonyμg/l 1Sampled Aug 2025 ≤ 5 1 Arsenicμg/l 2Sampled Nov 2025 ≤ 10 1 Bariumμg/l 23Sampled Nov 2025 ≤ 1,000 23 Cadmiumμg/l 1Sampled Aug 2025 ≤ 5 1 Chromiumμg/l 5Sampled Aug 2025 ≤ 50 5 Copperμg/l 61Sampled Aug 2025 ≤ 2,000 3.05 Ironμg/l 10Sampled Nov 2025 ≤ 200 10 Manganeseμg/l 10Sampled Nov 2025 ≤ 50 10 Leadμg/l 2Sampled Aug 2025 ≤ 10 0.1 Nickelμg/l 5Sampled Aug 2025 ≤ 20 5 Seleniumμg/l 2Sampled Nov 2025 ≤ 10 2 Sodiummg/l 4.4Sampled Nov 2025 ≤ 200 4.4
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Nov 2025 No limit 0.005 Total Trihalomethanesμg/l 2.35Sampled Nov 2025 ≤ 100 0.12
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Nov 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.096Sampled Nov 2025 ≤ 0.5 0.096
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Nov 2025 ≤ 70 0.02 Atrazineug/L 0.009Sampled Nov 2025 ≤ 3 0.009
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Nov 2025 No limit 0.001 PFOSug/L 0.001Sampled Nov 2025 No limit 0.001 PFNAug/L 0.001Sampled Nov 2025 No limit 0.001 Total PFASug/L 0.029Sampled Nov 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 0.01 No limit 0.003 Sulfatemg/l 8.5 No limit 8.5
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.
