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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 24 No limit 24 Hardnessmg CaCO3/l 167.4 80 – 459 167.4 Hardness fF 16.7 No limit 16.7 pH 7.7 6.5 – 9.5 7.7 TurbidityNTU 0.2 ≤ 4 0.02 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 346 ≤ 2,500 346 TDSmg/l 221.4estimated 0 – 1,199 221.4 Alkalinitymg CaCO3/l 144 No limit 144
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0 ≤ 0 0 eColiUFC/100ml 0 ≤ 0 0 BacteriasNMP/100ml 10 ≤ 0 1 EnterococcusUFC/100ml 0 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Mercuryμg Hg/l Not reported ≤ 1 — Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 1.2 ≤ 50 0.36
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Chloridemg/l 0.7 ≤ 250 0.7
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Antimonyμg/l 1Sampled Jul 2025 ≤ 5 1 Arsenicμg/l Not reported ≤ 10 — Cadmiumμg/l 1Sampled Jul 2025 ≤ 5 1 Chromiumμg/l 5Sampled Jul 2025 ≤ 50 5 Copperμg/l 95Sampled Jul 2025 ≤ 2,000 4.75 Leadμg/l 3Sampled Jul 2025 ≤ 10 0.15 Nickelμg/l 5Sampled Jul 2025 ≤ 20 5
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered Total PFASug/L Not reported ≤ 0.1 — 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 0.03 No limit 0.009 Sulfatemg/l 55 No limit 55
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.
