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STGS SARL
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.47Sampled Jun 2026 0.2 – 1 0.009 ▲ Total Chlorinemg CL2/l 0.49Sampled Jun 2026 No limit 0.098
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 19Sampled Jun 2026 No limit 19 Hardnessmg CaCO3/l 360Sampled Jun 2026 80 – 459 360 Hardness fF 36Sampled Jun 2026 No limit 36 pH 7.3Sampled Jun 2026 6.5 – 9.5 7.3 TurbidityNTU 0.2 ≤ 4 0.02 ConductivityμS / cm 716Sampled Jun 2026 ≤ 2,500 716 TDSmg/l 458.2Sampled Jun 2026 estimated 0 – 1,199 458.2 Alkalinitymg CaCO3/l 295Sampled Jun 2026 No limit 295 Bicarbonatemg HCO3/l 359Sampled Sept 2025 No limit 359
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Jun 2026 ≤ 0 0 eColiUFC/100ml 0Sampled Jun 2026 ≤ 0 0 BacteriasNMP/100ml 0Sampled Jun 2026 ≤ 0 0 EnterococcusUFC/100ml 0Sampled Jun 2026 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 10Sampled Sept 2025 ≤ 50 0.5 Fluoridemg F/l 0.11Sampled Sept 2025 ≤ 1.5 0.033 Mercuryμg Hg/l 0.05Sampled Sept 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.01Sampled Jun 2026 ≤ 0.5 0.004 Nitratesmg NO3/l 21Sampled Jun 2026 ≤ 50 6.3
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 3.5Sampled Sept 2025 No limit 3.5 Calciummg/l 140Sampled Sept 2025 No limit 140 Potassiummg/l 3Sampled Sept 2025 No limit 3 Chloridemg/l 20Sampled Jun 2026 ≤ 250 20
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Sept 2025 ≤ 200 2 Arsenicμg/l 0.98Sampled Sept 2025 ≤ 10 0.49 Bariumμg/l 2.1Sampled Sept 2025 ≤ 1,000 2.1 Ironμg/l 1.8Sampled Sept 2025 ≤ 200 1.8 Manganeseμg/l 1Sampled Sept 2025 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 1.1Sampled Sept 2025 ≤ 10 1.1 Sodiummg/l 6.7Sampled Sept 2025 ≤ 200 6.7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Sept 2025 No limit 0.003 Total Trihalomethanesμg/l 0.64Sampled Feb 2026 ≤ 100 0.032
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Sept 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.05Sampled Sept 2025 ≤ 0.5 0.05
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Sept 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Sept 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Sept 2025 No limit 0.001 PFOSug/L 0.001Sampled Sept 2025 No limit 0.001 PFNAug/L 0.001Sampled Sept 2025 No limit 0.001 Total PFASug/L 0.001Sampled Sept 2025 ≤ 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 0.05Sampled Jun 2026 No limit 0.015 Sulfatemg/l 35Sampled Jun 2026 No limit 35
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.
