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STGS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.1 ● (Near the limit) 0.2 – 1 0.002 ▲ Total Chlorinemg CL2/l 0.12 No limit 0.024
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24.5 No limit 24.5 Hardnessmg CaCO3/l 198 80 – 459 198 Hardness fF 19.8 No limit 19.8 pH 7.9 6.5 – 9.5 7.9 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 507 ≤ 2,500 507 TDSmg/l 324.5estimated 0 – 1,199 324.5 Alkalinitymg CaCO3/l 162 No limit 162 Bicarbonatemg HCO3/l 138Sampled Jun 2026 No limit 138
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Feb 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 5Sampled Oct 2025 ≤ 50 0.25 Fluoridemg F/l 0.26Sampled Oct 2025 ≤ 1.5 0.079 Mercuryμg Hg/l 0.015Sampled Oct 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 46 ● (Near the limit) ≤ 50 13.8
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 8Sampled Jun 2026 No limit 8 Calciummg/l 41.6Sampled Jun 2026 No limit 41.6 Potassiummg/l 1.9Sampled Jun 2026 No limit 1.9 Chloridemg/l 28.2 ≤ 250 28.2
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Oct 2025 ≤ 200 2 Antimonyμg/l 0.2Sampled Jul 2025 ≤ 5 0.2 Arsenicμg/l 0.2Sampled Oct 2025 ≤ 10 0.1 Bariumμg/l 139Sampled Oct 2025 ≤ 1,000 139 Cadmiumμg/l 0.01Sampled Jul 2025 ≤ 5 0.01 Chromiumμg/l 0.5Sampled Jul 2025 ≤ 50 0.5 Copperμg/l 4.7Sampled Jul 2025 ≤ 2,000 0.24 Ironμg/l 5 ≤ 200 5 Manganeseμg/l 1 ≤ 50 1 Leadμg/l 0.2Sampled Jul 2025 ≤ 10 0.01 Nickelμg/l 0.5Sampled Jul 2025 ≤ 20 0.5 Seleniumμg/l 0.2Sampled Oct 2025 ≤ 10 0.2 Sodiummg/l 23.5Sampled Jun 2026 ≤ 200 23.5
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Oct 2025 No limit 0.005 Total Trihalomethanesμg/l 4.3Sampled Oct 2025 ≤ 100 0.22
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Oct 2025 ≤ 2 0 Heptachlorug/L 0.001Sampled Oct 2025 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Oct 2025 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Oct 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Oct 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Oct 2025 No limit 0.001 PFOSug/L 0.002Sampled Oct 2025 No limit 0.002 PFNAug/L 0.001Sampled Oct 2025 No limit 0.001 Total PFASug/L 0Sampled Oct 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 0.01 No limit 0.003 Sulfatemg/l 19.7 No limit 19.7
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.
