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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.93 0.2 – 1 0.019 ▲ Total Chlorinemg CL2/l 0.94 No limit 0.19
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 29 No limit 29 Hardnessmg CaCO3/l 23 ● (Near the limit) 80 – 459 23 ● Hardness fF 2.3 No limit 2.3 pH 7.5 6.5 – 9.5 7.5 TurbidityNTU 2.9 ≤ 4 0.29 ColorColor Units 7.5 ≤ 15 7.5 ConductivityμS / cm 70 ≤ 2,500 70 TDSmg/l 44.8estimated 0 – 1,199 44.8 Alkalinitymg CaCO3/l 20 No limit 20
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 Dec 2025 ≤ 50 0.5 Fluoridemg F/l 0.2Sampled Dec 2025 ≤ 1.5 0.06 Mercuryμg Hg/l 0.05Sampled Dec 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.05 ≤ 0.5 0.02 Nitratesmg NO3/l 1 ≤ 50 0.3
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 0.87Sampled Dec 2025 No limit 0.87 Calciummg/l 5.77Sampled Dec 2025 No limit 5.77 Potassiummg/l 0.57Sampled Dec 2025 No limit 0.57 Chloridemg/l 4.65 ≤ 250 4.65
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 1,561 ▲ (Outside the range) ≤ 200 1,561 ▲ Antimonyμg/l 1Sampled Oct 2025 ≤ 5 1 Arsenicμg/l 5Sampled Dec 2025 ≤ 10 2.5 Bariumμg/l 50Sampled Dec 2025 ≤ 1,000 50 Cadmiumμg/l 0.5Sampled Oct 2025 ≤ 5 0.5 Chromiumμg/l 10Sampled Oct 2025 ≤ 50 10 Copperμg/l 50Sampled Oct 2025 ≤ 2,000 2.5 Ironμg/l 50Sampled Jun 2026 ≤ 200 50 Manganeseμg/l 10Sampled Jun 2026 ≤ 50 10 Leadμg/l 5Sampled Oct 2025 ≤ 10 0.25 Nickelμg/l 10Sampled Oct 2025 ≤ 20 10 Seleniumμg/l 2Sampled Dec 2025 ≤ 10 2 Sodiummg/l 2.47Sampled Dec 2025 ≤ 200 2.47
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Dec 2025 No limit 0.005 Total Trihalomethanesμg/l 12 ≤ 100 0.6
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Dec 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.1Sampled Dec 2025 ≤ 0.5 0.1
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.002Sampled Dec 2025 ≤ 70 0.002 Atrazineug/L 0.02Sampled Dec 2025 ≤ 3 0.02
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 14.1 No limit 4.24 Sulfatemg/l 1 No limit 1
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.
