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STGS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.13 ● (Near the limit) 0.2 – 1 0.003 ▲ Total Chlorinemg CL2/l 0.23 No limit 0.046
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 26.8 No limit 26.8 Hardnessmg CaCO3/l 114 80 – 459 114 Hardness fF 11.4 No limit 11.4 pH 8.1 6.5 – 9.5 8.1 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 458 ≤ 2,500 458 TDSmg/l 293.1estimated 0 – 1,199 293.1 Alkalinitymg CaCO3/l 91 No limit 91 Bicarbonatemg HCO3/l 170Sampled Feb 2026 No limit 170
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 Aug 2025 ≤ 50 0.25 Fluoridemg F/l 0.1Sampled Aug 2025 ≤ 1.5 0.031 Mercuryμg Hg/l 0.015Sampled Aug 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 13 ≤ 50 3.9
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 7.3Sampled Feb 2026 No limit 7.3 Calciummg/l 49.1Sampled Feb 2026 No limit 49.1 Potassiummg/l 3.8Sampled Feb 2026 No limit 3.8 Chloridemg/l 54.7 ≤ 250 54.7
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Aug 2025 ≤ 200 2 Antimonyμg/l 0.2Sampled May 2025 ≤ 5 0.2 Arsenicμg/l 2.5Sampled Aug 2025 ≤ 10 1.25 Bariumμg/l 54Sampled Aug 2025 ≤ 1,000 54 Cadmiumμg/l 0.38Sampled May 2025 ≤ 5 0.38 Chromiumμg/l 0.8Sampled May 2025 ≤ 50 0.8 Copperμg/l 14.5Sampled Jun 2026 ≤ 2,000 0.73 Ironμg/l 12 ≤ 200 12 Manganeseμg/l 5 ≤ 50 5 Leadμg/l 0.4Sampled Jun 2026 ≤ 10 0.02 Nickelμg/l 1.2Sampled Jun 2026 ≤ 20 1.2 Seleniumμg/l 0.4Sampled Aug 2025 ≤ 10 0.4 Sodiummg/l 33.9Sampled Feb 2026 ≤ 200 33.9
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Aug 2025 No limit 0.005 Total Trihalomethanesμg/l 44 ≤ 100 2.2
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 6 ≤ 60 0.3
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Aug 2025 ≤ 2 0 Heptachlorug/L 0.001Sampled Aug 2025 ≤ 0.4 0.001 Total pesticidesug/L 0.057Sampled Aug 2025 ≤ 0.5 0.057
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Aug 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Aug 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Feb 2026 No limit 0.001 PFOSug/L 0.002Sampled Feb 2026 No limit 0.002 PFNAug/L 0.001Sampled Feb 2026 No limit 0.001 Total PFASug/L 0.002Sampled Feb 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 35.5 No limit 35.5
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.
