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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 0.31 No limit 0.062
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 13.8 No limit 13.8 Hardnessmg CaCO3/l 284 80 – 459 284 Hardness fF 28.4 No limit 28.4 pH 7.7 6.5 – 9.5 7.7 TurbidityNTU 0.3 ≤ 4 0.03 ConductivityμS / cm 619 ≤ 2,500 619 TDSmg/l 396.2estimated 0 – 1,199 396.2 Alkalinitymg CaCO3/l 222 No limit 222
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered 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 Jan 2025 ≤ 50 0.5 Fluoridemg F/l 0.1Sampled Jan 2025 ≤ 1.5 0.03 Mercuryμg Hg/l 0.05Sampled Jan 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 39.8 ≤ 50 11.9
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 4.11Sampled Jan 2025 No limit 4.11 Calciummg/l 105.2Sampled Jan 2025 No limit 105.2 Potassiummg/l 2.2Sampled Jan 2025 No limit 2.2 Chloridemg/l 32.4 ≤ 250 32.4
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2.4Sampled Jan 2025 ≤ 200 2.4 Antimonyμg/l 0.5Sampled Jul 2025 ≤ 5 0.5 Arsenicμg/l 0.5Sampled Jan 2025 ≤ 10 0.25 Bariumμg/l 33Sampled Jan 2025 ≤ 1,000 33 Cadmiumμg/l 0.1Sampled Jul 2025 ≤ 5 0.1 Chromiumμg/l 0.5Sampled Jul 2025 ≤ 50 0.5 Ironμg/l 7Sampled Jul 2025 ≤ 200 7 Manganeseμg/l 0.5Sampled Jan 2025 ≤ 50 0.5 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Jan 2025 ≤ 10 2 Sodiummg/l 16.7Sampled Jan 2025 ≤ 200 16.7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Jan 2025 No limit 0.003 Total Trihalomethanesμg/l 3.7Sampled Jan 2025 ≤ 100 0.19
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jan 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.45 ● (Near the limit) Sampled Jan 2025 ≤ 0.5 0.45 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jan 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Jan 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Jan 2025 No limit 0.002 PFOSug/L 0.001Sampled Jan 2025 No limit 0.001 PFNAug/L 0.001Sampled Jan 2025 No limit 0.001 Total PFASug/L 0Sampled Jan 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 17.2 No limit 17.2
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.
