← Back to summary See all parameters SEM ONDAINE CALOIRE FONFROIDE · Fraisses
SAINT-ETIENNE MÉTROPOLE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.03 ▲ (Outside the range) 0.2 – 1 0.001 ▲ Total Chlorinemg CL2/l 0.06 No limit 0.012
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 26.9 No limit 26.9 Hardnessmg CaCO3/l 89.5 80 – 459 89.5 Hardness fF 8.95 No limit 8.95 pH 8 6.5 – 9.5 8 TurbidityNTU 0.13 ≤ 4 0.013 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 205 ≤ 2,500 205 TDSmg/l 131.2estimated 0 – 1,199 131.2 Alkalinitymg CaCO3/l 74.1 No limit 74.1
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 3.1 ≤ 50 0.93
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 1.7 No limit 1.7 Calciummg/l 33 No limit 33 Chloridemg/l 7.6 ≤ 250 7.6
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 27 ≤ 200 27 Antimonyμg/l 1Sampled Nov 2025 ≤ 5 1 Arsenicμg/l Not reported ≤ 10 — Cadmiumμg/l 1Sampled Nov 2025 ≤ 5 1 Chromiumμg/l 5Sampled Nov 2025 ≤ 50 5 Ironμg/l 10Sampled Nov 2025 ≤ 200 10 Leadμg/l Not reported ≤ 10 —
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Total Trihalomethanesμg/l 58.3 ≤ 100 2.91
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 20.3 No limit 20.3
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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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.
