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SIEVAM
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.22Sampled Apr 2026 0.2 – 1 0.004 ▲ Total Chlorinemg CL2/l 0.25Sampled Apr 2026 No limit 0.05
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 18.3 No limit 18.3 Hardnessmg CaCO3/l 371.9Sampled Apr 2026 80 – 459 371.9 Hardness fF 37.2Sampled Apr 2026 No limit 37.2 pH 7.4Sampled Apr 2026 6.5 – 9.5 7.4 TurbidityNTU 0.1Sampled Apr 2026 ≤ 4 0.01 ConductivityμS / cm 718Sampled Apr 2026 ≤ 2,500 718 TDSmg/l 459.5Sampled Apr 2026 estimated 0 – 1,199 459.5 Alkalinitymg CaCO3/l 278Sampled Apr 2026 No limit 278 Bicarbonatemg HCO3/l 340Sampled Nov 2025 No limit 340
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Apr 2026 ≤ 0 0 eColiUFC/100ml 0Sampled Apr 2026 ≤ 0 0 BacteriasNMP/100ml 0Sampled Apr 2026 ≤ 0 0 EnterococcusUFC/100ml 0Sampled Apr 2026 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 10Sampled Nov 2025 ≤ 50 0.5 Fluoridemg F/l 0.22Sampled Nov 2025 ≤ 1.5 0.066 Mercuryμg Hg/l 0.01Sampled Nov 2025 ≤ 1 0.001 Nitritesmg NO2/l 0.01Sampled Apr 2026 ≤ 0.5 0.004 Nitratesmg NO3/l 36Sampled Apr 2026 ≤ 50 10.8
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 19.3Sampled Apr 2026 No limit 19.3 Calciummg/l 114.3Sampled Nov 2025 No limit 114.3 Potassiummg/l 1.2Sampled Nov 2025 No limit 1.2 Chloridemg/l 26.8Sampled Apr 2026 ≤ 250 26.8
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Apr 2026 ≤ 200 10 Antimonyμg/l 1Sampled Jun 2025 ≤ 5 1 Arsenicμg/l 2Sampled Nov 2025 ≤ 10 1 Bariumμg/l 53Sampled Nov 2025 ≤ 1,000 53 Cadmiumμg/l 1Sampled Jun 2025 ≤ 5 1 Chromiumμg/l 5Sampled Jun 2025 ≤ 50 5 Ironμg/l 10Sampled Apr 2026 ≤ 200 10 Manganeseμg/l 10Sampled Apr 2026 ≤ 50 10 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Nov 2025 ≤ 10 2 Sodiummg/l 7.8Sampled Nov 2025 ≤ 200 7.8
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Nov 2025 No limit 0.005 Total Trihalomethanesμg/l 10.9Sampled Apr 2026 ≤ 100 0.55
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Total pesticidesug/L 0.13Sampled Apr 2026 ≤ 0.5 0.13
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Nov 2025 ≤ 70 0.02 Atrazineug/L 0.007Sampled Apr 2026 ≤ 3 0.007
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Nov 2025 No limit 0.001 PFOSug/L 0.001Sampled Nov 2025 No limit 0.001 PFNAug/L 0.001Sampled Nov 2025 No limit 0.001 Total PFASug/L 0.029Sampled Nov 2025 ≤ 0.1 0.003 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 0.01Sampled Apr 2026 No limit 0.003 Perchlorateug/L 3.77 No limit 3.77 Sulfatemg/l 43.6Sampled Apr 2026 No limit 43.6
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.
Your Water Quality
Independent information about tap water quality in France.
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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.
