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STGS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.68 0.2 – 1 0.014 ▲ Total Chlorinemg CL2/l 0.71 No limit 0.14
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 16.1 No limit 16.1 Hardnessmg CaCO3/l 318Sampled Apr 2026 80 – 459 318 Hardness fF 31.8Sampled Apr 2026 No limit 31.8 pH 7.4 6.5 – 9.5 7.4 TurbidityNTU 0.3 ≤ 4 0.03 ConductivityμS / cm 625 ≤ 2,500 625 TDSmg/l 400estimated 0 – 1,199 400 Alkalinitymg CaCO3/l 265Sampled Apr 2026 No limit 265
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Apr 2026 ≤ 0 0 eColiUFC/100ml 0Sampled Apr 2026 ≤ 0 0 BacteriasNMP/100ml 0Sampled Apr 2026 ≤ 0 0 EnterococcusUFC/100ml 0Sampled Apr 2026 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 10Sampled Jan 2025 ≤ 50 0.5 Fluoridemg F/l 0.1Sampled Jan 2025 ≤ 1.5 0.03 Mercuryμg Hg/l 0.05Sampled Jan 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.01Sampled Apr 2026 ≤ 0.5 0.004 Nitratesmg NO3/l 37.1Sampled Apr 2026 ≤ 50 11.1
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 6.1Sampled Jan 2025 No limit 6.1 Calciummg/l 122.6Sampled Jan 2025 No limit 122.6 Potassiummg/l 1.6Sampled Jan 2025 No limit 1.6 Chloridemg/l 22.7Sampled Apr 2026 ≤ 250 22.7
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 3.2Sampled Jan 2025 ≤ 200 3.2 Antimonyμg/l 0.5Sampled Jun 2025 ≤ 5 0.5 Arsenicμg/l 0.5Sampled Jan 2025 ≤ 10 0.25 Bariumμg/l 11.5Sampled Jan 2025 ≤ 1,000 11.5 Cadmiumμg/l 0.1Sampled Jun 2025 ≤ 5 0.1 Chromiumμg/l 0.73Sampled Jun 2025 ≤ 50 0.73 Ironμg/l 5Sampled Jun 2025 ≤ 200 5 Manganeseμg/l 0.5Sampled Jan 2025 ≤ 50 0.5 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Jan 2025 ≤ 10 2 Sodiummg/l 9.3Sampled Jan 2025 ≤ 200 9.3
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Jan 2025 No limit 0.003 Total Trihalomethanesμg/l 7Sampled Mar 2026 ≤ 100 0.35
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jan 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.47 ● (Near the limit) Sampled Jan 2025 ≤ 0.5 0.47 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jan 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Jan 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Jan 2025 No limit 0.002 PFOSug/L 0.001Sampled Jan 2025 No limit 0.001 PFNAug/L 0.001Sampled Jan 2025 No limit 0.001 Total PFASug/L 0Sampled Jan 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 0.01Sampled Apr 2026 No limit 0.003 Sulfatemg/l 11.5Sampled Apr 2026 No limit 11.5
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.
