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GBA - REGIE DE L'EAU
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.48 0.2 – 1 0.01 ▲ Total Chlorinemg CL2/l 0.52 No limit 0.1
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24.9 No limit 24.9 Hardnessmg CaCO3/l 205.5 80 – 459 205.5 Hardness fF 20.6 No limit 20.6 pH 7.6 6.5 – 9.5 7.6 TurbidityNTU 0.18 ≤ 4 0.018 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 410 ≤ 2,500 410 TDSmg/l 262.4estimated 0 – 1,199 262.4 Alkalinitymg CaCO3/l 229.5 No limit 229.5
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 Jun 2026 ≤ 50 0.5 Fluoridemg F/l 0.05Sampled Jun 2026 ≤ 1.5 0.015 Mercuryμg Hg/l 0.01Sampled Jun 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 2.8 ≤ 50 0.84
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 4 No limit 4 Calciummg/l 75.6 No limit 75.6 Potassiummg/l 0.8Sampled Jun 2026 No limit 0.8 Chloridemg/l 6 ≤ 250 6
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Jun 2026 ≤ 200 10 Antimonyμg/l 1Sampled Jun 2026 ≤ 5 1 Arsenicμg/l 2Sampled Jun 2026 ≤ 10 1 Bariumμg/l 10Sampled Jun 2026 ≤ 1,000 10 Cadmiumμg/l 1Sampled Jun 2026 ≤ 5 1 Chromiumμg/l 5Sampled Jun 2026 ≤ 50 5 Copperμg/l 148Sampled Jun 2026 ≤ 2,000 7.4 Ironμg/l 35Sampled Jun 2026 ≤ 200 35 Manganeseμg/l 10Sampled Jun 2026 ≤ 50 10 Leadμg/l 2Sampled Jun 2026 ≤ 10 0.1 Nickelμg/l 5Sampled Jun 2026 ≤ 20 5 Seleniumμg/l 2Sampled Jun 2026 ≤ 10 2 Sodiummg/l 3.2Sampled Jun 2026 ≤ 200 3.2
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jun 2026 No limit 0.005 Total Trihalomethanesμg/l 27.1Sampled Jun 2026 ≤ 100 1.36
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 8.1Sampled Jun 2026 ≤ 60 0.41
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jun 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled Jun 2026 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jun 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Jun 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Jun 2026 No limit 0.001 PFOSug/L 0.001Sampled Jun 2026 No limit 0.001 PFNAug/L 0.001Sampled Jun 2026 No limit 0.001 Total PFASug/L 0.001Sampled Jun 2026 ≤ 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 0.02 No limit 0.006 Sulfatemg/l 4 No limit 4 Uraniumug/L 10Sampled Jun 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.
