← Back to summary See all parameters GBM VAIRE LE GRAND · Chalezeule
CU GRAND BESANÇON MÉTROPOLE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l Not reported 0.2 – 1 —
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 18.3 No limit 18.3 Hardnessmg CaCO3/l 291 80 – 459 291 Hardness fF 29.1 No limit 29.1 pH 7.5 6.5 – 9.5 7.5 TurbidityNTU 1.1 ≤ 4 0.11 ConductivityμS / cm 546 ≤ 2,500 546 TDSmg/l 349.4estimated 0 – 1,199 349.4 Alkalinitymg CaCO3/l 272 No limit 272 Bicarbonatemg HCO3/l 316Sampled Apr 2025 No limit 316
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 Apr 2026 ≤ 50 0.5 Fluoridemg F/l 0.07Sampled Apr 2026 ≤ 1.5 0.021 Mercuryμg Hg/l 0.015Sampled Apr 2026 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 6.7 ≤ 50 2.01
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 1.77Sampled Apr 2026 No limit 1.77 Calciummg/l 102Sampled Apr 2026 No limit 102 Potassiummg/l 0.42Sampled Apr 2026 No limit 0.42 Chloridemg/l 4.3 ≤ 250 4.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Apr 2026 ≤ 200 10 Antimonyμg/l 1Sampled Apr 2026 ≤ 5 1 Arsenicμg/l 1Sampled Apr 2026 ≤ 10 0.5 Bariumμg/l 10Sampled Apr 2026 ≤ 1,000 10 Cadmiumμg/l 1Sampled Apr 2026 ≤ 5 1 Chromiumμg/l 2Sampled Apr 2026 ≤ 50 2 Copperμg/l 221Sampled Apr 2026 ≤ 2,000 11.1 Ironμg/l 10Sampled Apr 2026 ≤ 200 10 Manganeseμg/l 2Sampled Apr 2026 ≤ 50 2 Leadμg/l 3.4Sampled Apr 2026 ≤ 10 0.17 Nickelμg/l 2Sampled Apr 2026 ≤ 20 2 Seleniumμg/l 1Sampled Apr 2026 ≤ 10 1 Sodiummg/l 0.99Sampled Apr 2026 ≤ 200 0.99
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Apr 2026 No limit 0.005
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Apr 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled Apr 2026 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Apr 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Apr 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Apr 2026 No limit 0.001 PFOSug/L 0.001Sampled Apr 2026 No limit 0.001 PFNAug/L 0.001Sampled Apr 2026 No limit 0.001 Total PFASug/L 0.029Sampled Apr 2026 ≤ 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 8.7 No limit 8.7 Uraniumug/L 10Sampled Apr 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.
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.
