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STGS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.05 ● (Near the limit) 0.2 – 1 0.001 ▲ Total Chlorinemg CL2/l 0.19 No limit 0.038
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 15 No limit 15 Hardnessmg CaCO3/l 232 80 – 459 232 Hardness fF 23.2 No limit 23.2 pH 7.6 6.5 – 9.5 7.6 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 505 ≤ 2,500 505 TDSmg/l 323.2estimated 0 – 1,199 323.2 Alkalinitymg CaCO3/l 176 No limit 176 Bicarbonatemg HCO3/l 208Sampled Mar 2026 No limit 208
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 5Sampled Mar 2026 ≤ 50 0.25 Fluoridemg F/l 0.07Sampled Mar 2026 ≤ 1.5 0.021 Mercuryμg Hg/l 0.01Sampled Mar 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 49 ● (Near the limit) ≤ 50 14.7
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 8.5Sampled Mar 2026 No limit 8.5 Calciummg/l 67.2Sampled Mar 2026 No limit 67.2 Potassiummg/l 1.9Sampled Mar 2026 No limit 1.9 Chloridemg/l 21 ≤ 250 21
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 7Sampled Mar 2026 ≤ 200 7 Antimonyμg/l 0.1Sampled Mar 2026 ≤ 5 0.1 Arsenicμg/l 0.4Sampled Mar 2026 ≤ 10 0.2 Bariumμg/l 6Sampled Mar 2026 ≤ 1,000 6 Cadmiumμg/l 0.15Sampled Mar 2026 ≤ 5 0.15 Chromiumμg/l 0.5Sampled Mar 2026 ≤ 50 0.5 Copperμg/l 29 ≤ 2,000 1.45 Ironμg/l 1 ≤ 200 1 Manganeseμg/l 0.5 ≤ 50 0.5 Leadμg/l 1.1 ≤ 10 0.055 Nickelμg/l 4.5 ≤ 20 4.5 Seleniumμg/l 0.2Sampled Mar 2026 ≤ 10 0.2 Sodiummg/l 14.6Sampled Mar 2026 ≤ 200 14.6
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Mar 2026 No limit 0.005 Total Trihalomethanesμg/l 9.6 ≤ 100 0.48
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 3.7 ≤ 60 0.19
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Mar 2026 ≤ 2 0 Heptachlorug/L 0.001Sampled Mar 2026 ≤ 0.4 0.001 Total pesticidesug/L 0.012Sampled Mar 2026 ≤ 0.5 0.012
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Mar 2026 ≤ 70 0.02 Atrazineug/L 0.01Sampled Mar 2026 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Mar 2026 No limit 0.001 PFOSug/L 0.002Sampled Mar 2026 No limit 0.002 PFNAug/L 0.001Sampled Mar 2026 No limit 0.001 Total PFASug/L 0Sampled Mar 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 0.01 No limit 0.003 Sulfatemg/l 16.2 No limit 16.2 Uraniumug/L 0.1Sampled Mar 2026 No limit 0.1
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.
