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GAZ ET EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.45 0.2 – 1 0.009 ▲ Total Chlorinemg CL2/l 0.5 No limit 0.1
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 9.5 No limit 9.5 Hardnessmg CaCO3/l 268 80 – 459 268 Hardness fF 26.8 No limit 26.8 pH 7.8 6.5 – 9.5 7.8 TurbidityNTU 0.2 ≤ 4 0.02 ConductivityμS / cm 485 ≤ 2,500 485 TDSmg/l 310.4estimated 0 – 1,199 310.4 Alkalinitymg CaCO3/l 239 No limit 239 Bicarbonatemg HCO3/l 305Sampled Dec 2025 No limit 305
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 Dec 2025 ≤ 50 0.5 Fluoridemg F/l 0.06Sampled Dec 2025 ≤ 1.5 0.018 Mercuryμg Hg/l 0.015Sampled Dec 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 6.3 ≤ 50 1.89
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 3.12Sampled Dec 2025 No limit 3.12 Calciummg/l 98.3Sampled Dec 2025 No limit 98.3 Potassiummg/l 0.73Sampled Dec 2025 No limit 0.73 Chloridemg/l 6.6 ≤ 250 6.6
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Dec 2025 ≤ 200 10 Arsenicμg/l 1Sampled Dec 2025 ≤ 10 0.5 Bariumμg/l 10Sampled Dec 2025 ≤ 1,000 10 Ironμg/l 10Sampled Dec 2025 ≤ 200 10 Manganeseμg/l 2Sampled Dec 2025 ≤ 50 2 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 1Sampled Dec 2025 ≤ 10 1 Sodiummg/l 2.14Sampled Dec 2025 ≤ 200 2.14
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 16.4Sampled Dec 2025 ≤ 100 0.82
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Dec 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled Dec 2025 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Dec 2025 ≤ 70 0.02 Atrazineug/L 0.005Sampled Dec 2025 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Dec 2025 No limit 0.001 PFOSug/L 0.001Sampled Dec 2025 No limit 0.001 PFNAug/L 0.001Sampled Dec 2025 No limit 0.001 Total PFASug/L 0.029Sampled Dec 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 0.01 No limit 0.003 Sulfatemg/l 4.3 No limit 4.3
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.
