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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.05 ● (Near the limit) 0.2 – 1 0.001 ▲ Total Chlorinemg CL2/l 0.05 No limit 0.01
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 14.2 No limit 14.2 Hardnessmg CaCO3/l 43.6 ● (Near the limit) 80 – 459 43.6 ● Hardness fF 4.36 No limit 4.36 pH 7.7 6.5 – 9.5 7.7 TurbidityNTU 0.15 ≤ 4 0.015 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 97 ≤ 2,500 97 TDSmg/l 62.1estimated 0 – 1,199 62.1 Alkalinitymg CaCO3/l 44.5 No limit 44.5
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 Sept 2025 ≤ 50 0.5 Fluoridemg F/l 0.05Sampled Sept 2025 ≤ 1.5 0.015 Mercuryμg Hg/l 0.01Sampled Sept 2025 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 2.2 ≤ 50 0.66
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 1.2Sampled Sept 2025 No limit 1.2 Calciummg/l 18.1Sampled Sept 2025 No limit 18.1 Potassiummg/l 0.1Sampled Sept 2025 No limit 0.1 Chloridemg/l 0.5 ≤ 250 0.5
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Sept 2025 ≤ 200 10 Antimonyμg/l 1Sampled Aug 2025 ≤ 5 1 Arsenicμg/l 2Sampled Sept 2025 ≤ 10 1 Bariumμg/l 10Sampled Sept 2025 ≤ 1,000 10 Cadmiumμg/l 1Sampled Aug 2025 ≤ 5 1 Chromiumμg/l 5Sampled Aug 2025 ≤ 50 5 Copperμg/l 10Sampled Aug 2025 ≤ 2,000 0.5 Ironμg/l 10Sampled Sept 2025 ≤ 200 10 Manganeseμg/l 10Sampled Sept 2025 ≤ 50 10 Leadμg/l 2Sampled Aug 2025 ≤ 10 0.1 Nickelμg/l 5Sampled Aug 2025 ≤ 20 5 Seleniumμg/l 2Sampled Sept 2025 ≤ 10 2 Sodiummg/l 1.5Sampled Sept 2025 ≤ 200 1.5
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Sept 2025 No limit 0.005 Total Trihalomethanesμg/l 0.5Sampled Sept 2025 ≤ 100 0.025
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Sept 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled Sept 2025 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Sept 2025 ≤ 70 0.02 Atrazineug/L 0.005Sampled Sept 2025 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Sept 2025 No limit 0.001 PFOSug/L 0.001Sampled Sept 2025 No limit 0.001 PFNAug/L 0.001Sampled Sept 2025 No limit 0.001 Total PFASug/L 0.029Sampled Sept 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 7.8 No limit 7.8
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.
