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STGS SARL
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.73 0.2 – 1 0.015 ▲ Total Chlorinemg CL2/l 0.77 No limit 0.15
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 15 No limit 15 Hardnessmg CaCO3/l 346 80 – 459 346 Hardness fF 34.6 No limit 34.6 pH 7.2 6.5 – 9.5 7.2 TurbidityNTU 0.2 ≤ 4 0.02 ConductivityμS / cm 708 ≤ 2,500 708 TDSmg/l 453.1estimated 0 – 1,199 453.1 Alkalinitymg CaCO3/l 301 No limit 301 Bicarbonatemg HCO3/l 360Sampled Feb 2026 No limit 360
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 Feb 2026 ≤ 50 0.5 Fluoridemg F/l 0.12Sampled Feb 2026 ≤ 1.5 0.036 Mercuryμg Hg/l 0.05Sampled Feb 2026 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 23 ≤ 50 6.9
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 3.5Sampled Feb 2026 No limit 3.5 Calciummg/l 140Sampled Feb 2026 No limit 140 Potassiummg/l 3Sampled Feb 2026 No limit 3 Chloridemg/l 19 ≤ 250 19
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Feb 2026 ≤ 200 2 Antimonyμg/l 0.5Sampled Feb 2026 ≤ 5 0.5 Arsenicμg/l 1.1Sampled Feb 2026 ≤ 10 0.55 Bariumμg/l 2.3Sampled Feb 2026 ≤ 1,000 2.3 Cadmiumμg/l 0.025Sampled Feb 2026 ≤ 5 0.025 Chromiumμg/l 1Sampled Feb 2026 ≤ 50 1 Ironμg/l 1.4Sampled Feb 2026 ≤ 200 1.4 Manganeseμg/l 1Sampled Feb 2026 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 1.1Sampled Feb 2026 ≤ 10 1.1 Sodiummg/l 6.8Sampled Feb 2026 ≤ 200 6.8
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Feb 2026 No limit 0.003 Total Trihalomethanesμg/l 2.19 ≤ 100 0.11
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 1.5Sampled Feb 2026 ≤ 60 0.075
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Feb 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.03Sampled Feb 2026 ≤ 0.5 0.03
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Feb 2026 ≤ 70 0.02 Atrazineug/L 0.01Sampled Feb 2026 ≤ 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 0.001Sampled Feb 2026 No limit 0.001 PFNAug/L 0.001Sampled Feb 2026 No limit 0.001 Total PFASug/L 0Sampled 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 0.05 No limit 0.015 Sulfatemg/l 35 No limit 35 Uraniumug/L 0.61Sampled Feb 2026 No limit 0.61
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.
