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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.31 0.2 – 1 0.006 ▲ Total Chlorinemg CL2/l 0.36 No limit 0.072
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 12.7 No limit 12.7 Hardnessmg CaCO3/l 289 80 – 459 289 Hardness fF 28.9 No limit 28.9 pH 7.5 6.5 – 9.5 7.5 TurbidityNTU 0.3 ≤ 4 0.03 ConductivityμS / cm 549 ≤ 2,500 549 TDSmg/l 351.4estimated 0 – 1,199 351.4 Alkalinitymg CaCO3/l 217 No limit 217
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 Jul 2025 ≤ 50 0.5 Fluoridemg F/l 0.1Sampled Jul 2025 ≤ 1.5 0.03 Mercuryμg Hg/l 0.05Sampled Jul 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 27.4 ≤ 50 8.22
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 4.35Sampled Jul 2025 No limit 4.35 Calciummg/l 101.1Sampled Jul 2025 No limit 101.1 Potassiummg/l 1.7Sampled Jul 2025 No limit 1.7 Chloridemg/l 28.3 ≤ 250 28.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 4.1Sampled Jul 2025 ≤ 200 4.1 Arsenicμg/l 0.5Sampled Jul 2025 ≤ 10 0.25 Bariumμg/l 17.1Sampled Jul 2025 ≤ 1,000 17.1 Ironμg/l 5Sampled Jul 2025 ≤ 200 5 Manganeseμg/l 0.5Sampled Jul 2025 ≤ 50 0.5 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Jul 2025 ≤ 10 2 Sodiummg/l 12.1Sampled Jul 2025 ≤ 200 12.1
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Jul 2025 No limit 0.003 Total Trihalomethanesμg/l 4.66Sampled Jul 2025 ≤ 100 0.23
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jul 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.28Sampled Jul 2025 ≤ 0.5 0.28
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jul 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Jul 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Apr 2025 No limit 0.002 PFOSug/L 0.001Sampled Apr 2025 No limit 0.001 PFNAug/L 0.001Sampled Apr 2025 No limit 0.001 Total PFASug/L 0Sampled Apr 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 12.3 No limit 12.3
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.
