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STGS SARL
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.4 0.2 – 1 0.008 ▲ Total Chlorinemg CL2/l 0.43 No limit 0.086
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 22 No limit 22 Hardnessmg CaCO3/l 144 80 – 459 144 Hardness fF 14.4 No limit 14.4 pH 7.9 6.5 – 9.5 7.9 TurbidityNTU 0.2 ≤ 4 0.02 ConductivityμS / cm 525 ≤ 2,500 525 TDSmg/l 336estimated 0 – 1,199 336 Alkalinitymg CaCO3/l 191 No limit 191 Bicarbonatemg HCO3/l 362Sampled Mar 2025 No limit 362
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Nov 2025 ≤ 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 Mar 2025 ≤ 50 0.5 Fluoridemg F/l 0.092Sampled Mar 2025 ≤ 1.5 0.028 Mercuryμg Hg/l 0.05Sampled Mar 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 19 ≤ 50 5.7
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 3.6Sampled Mar 2025 No limit 3.6 Calciummg/l 140Sampled Mar 2025 No limit 140 Potassiummg/l 3.2Sampled Mar 2025 No limit 3.2 Chloridemg/l 18 ≤ 250 18
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Mar 2025 ≤ 200 2 Antimonyμg/l 0.5Sampled Aug 2025 ≤ 5 0.5 Arsenicμg/l 1.2Sampled Mar 2025 ≤ 10 0.6 Bariumμg/l 1.6Sampled Mar 2025 ≤ 1,000 1.6 Cadmiumμg/l 0.025Sampled Aug 2025 ≤ 5 0.025 Chromiumμg/l 1Sampled Aug 2025 ≤ 50 1 Ironμg/l 4.1 ≤ 200 4.1 Manganeseμg/l 1Sampled Mar 2025 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 1.2Sampled Mar 2025 ≤ 10 1.2 Sodiummg/l 7Sampled Mar 2025 ≤ 200 7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Mar 2025 No limit 0.003 Total Trihalomethanesμg/l 12.3Sampled Mar 2025 ≤ 100 0.62
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Mar 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.05Sampled Mar 2025 ≤ 0.5 0.05
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Mar 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Mar 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Mar 2025 No limit 0.002 PFOSug/L 0.001Sampled Mar 2025 No limit 0.001 PFNAug/L 0.001Sampled Mar 2025 No limit 0.001 Total PFASug/L 0Sampled Mar 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 0.05 No limit 0.015 Sulfatemg/l 42 No limit 42
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.
