← Back to summary See all parameters SEM MARCENOD FLACHES · Grammond
SAINT-ETIENNE MÉTROPOLE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.22 0.2 – 1 0.004 ▲ Total Chlorinemg CL2/l 0.31 No limit 0.062
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 22.4 No limit 22.4 Hardnessmg CaCO3/l 44.8 ● (Near the limit) 80 – 459 44.8 ● Hardness fF 4.48 No limit 4.48 pH 6.6 6.5 – 9.5 6.6 TurbidityNTU 0.13 ≤ 4 0.013 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 145 ≤ 2,500 145 TDSmg/l 92.8estimated 0 – 1,199 92.8 Alkalinitymg CaCO3/l 43.3 No limit 43.3
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 Mar 2025 ≤ 50 0.5 Fluoridemg F/l 0.08Sampled Mar 2025 ≤ 1.5 0.024 Mercuryμg Hg/l 0.01Sampled Mar 2025 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 9.4 ≤ 50 2.82
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 2.8 No limit 2.8 Calciummg/l 13.3 No limit 13.3 Potassiummg/l 1.8Sampled Mar 2025 No limit 1.8 Chloridemg/l 7 ≤ 250 7
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 22Sampled Mar 2025 ≤ 200 22 Antimonyμg/l 1Sampled Aug 2025 ≤ 5 1 Arsenicμg/l 2Sampled Mar 2025 ≤ 10 1 Bariumμg/l 66Sampled Mar 2025 ≤ 1,000 66 Cadmiumμg/l 1Sampled Aug 2025 ≤ 5 1 Chromiumμg/l 5Sampled Aug 2025 ≤ 50 5 Ironμg/l 10Sampled Aug 2025 ≤ 200 10 Manganeseμg/l 10Sampled Mar 2025 ≤ 50 10 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Mar 2025 ≤ 10 2 Sodiummg/l 6.8Sampled Mar 2025 ≤ 200 6.8
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Mar 2025 No limit 0.005
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Mar 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.034Sampled Mar 2025 ≤ 0.5 0.034
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Mar 2025 ≤ 70 0.02 Atrazineug/L 0.005Sampled Mar 2025 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Mar 2025 No limit 0.001 PFOSug/L 0.001Sampled Mar 2025 No limit 0.001 PFNAug/L 0.001Sampled Mar 2025 No limit 0.001 Total PFASug/L 0.1 ● (Near the limit) Sampled Mar 2025 ≤ 0.1 0.01 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 9.8 No limit 9.8
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.
