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Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.03 ▲ (Outside the range) 0.2 – 1 0.001 ▲ Total Chlorinemg CL2/l 0.03 No limit 0.006
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24.9 No limit 24.9 Hardnessmg CaCO3/l 118.7 80 – 459 118.7 Hardness fF 11.9 No limit 11.9 pH 8 6.5 – 9.5 8 TurbidityNTU 0.11 ≤ 4 0.011 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 346 ≤ 2,500 346 TDSmg/l 221.4estimated 0 – 1,199 221.4 Alkalinitymg CaCO3/l 140 No limit 140
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 2026 ≤ 50 0.5 Fluoridemg F/l 0.05Sampled Jul 2026 ≤ 1.5 0.015 Mercuryμg Hg/l 0.5Sampled Jul 2026 ≤ 1 0.05 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 6 No limit 6 Calciummg/l 37.6 No limit 37.6 Potassiummg/l 3.8Sampled Jul 2026 No limit 3.8 Chloridemg/l 28.1 ≤ 250 28.1
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 40 ≤ 200 40 Antimonyμg/l 1Sampled Jul 2026 ≤ 5 1 Arsenicμg/l 2Sampled Jul 2026 ≤ 10 1 Bariumμg/l 29Sampled Jul 2026 ≤ 1,000 29 Cadmiumμg/l 1Sampled Jul 2026 ≤ 5 1 Chromiumμg/l 5Sampled Jul 2026 ≤ 50 5 Copperμg/l 25Sampled Jul 2026 ≤ 2,000 1.25 Ironμg/l 10Sampled Jul 2026 ≤ 200 10 Manganeseμg/l 10Sampled Jul 2026 ≤ 50 10 Leadμg/l 2Sampled Jul 2026 ≤ 10 0.1 Nickelμg/l 5Sampled Jul 2026 ≤ 20 5 Seleniumμg/l 2Sampled Jul 2026 ≤ 10 2 Sodiummg/l 20.7Sampled Jul 2026 ≤ 200 20.7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jul 2026 No limit 0.005 Total Trihalomethanesμg/l 40.6 ≤ 100 2.03
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 7Sampled Jul 2026 ≤ 60 0.35
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jul 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.01Sampled Jul 2026 ≤ 0.5 0.01
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jul 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Jul 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Jul 2026 No limit 0.002 PFOSug/L 0.002Sampled Jul 2026 No limit 0.002 PFNAug/L 0.001Sampled Jul 2026 No limit 0.001 Total PFASug/L 0.018Sampled Jul 2026 ≤ 0.1 0.002 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 0.02 No limit 0.006 Sulfatemg/l 15.1 No limit 15.1 Uraniumug/L 10Sampled Jul 2026 No limit 10
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.
