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GRENOBLE ALPES METROPOLE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.21 0.2 – 1 0.004 ▲ Total Chlorinemg CL2/l 0.27 No limit 0.054
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 6.6 No limit 6.6 Hardnessmg CaCO3/l 168.6 80 – 459 168.6 Hardness fF 16.9 No limit 16.9 pH 7.6 6.5 – 9.5 7.6 TurbidityNTU 0.19 ≤ 4 0.019 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 327 ≤ 2,500 327 TDSmg/l 209.3estimated 0 – 1,199 209.3 Alkalinitymg CaCO3/l 167 No limit 167
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 Mercuryμg Hg/l Not reported ≤ 1 — Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 3.19 ≤ 50 0.96
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Chloridemg/l 0.7 ≤ 250 0.7
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Arsenicμg/l Not reported ≤ 10 — Leadμg/l Not reported ≤ 10 —
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered Total PFASug/L Not reported ≤ 0.1 — 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 4.6 No limit 4.6
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.
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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.
