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TRIGONE EAU
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.08 ● (Near the limit) 0.2 – 1 0.002 ▲ Total Chlorinemg CL2/l 0.13 No limit 0.026
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 31.1 No limit 31.1 Hardnessmg CaCO3/l 85.5 80 – 459 85.5 Hardness fF 8.55 No limit 8.55 pH 8.1 6.5 – 9.5 8.1 TurbidityNTU 0.1 ≤ 4 0.01 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 263 ≤ 2,500 263 TDSmg/l 168.3estimated 0 – 1,199 168.3 Alkalinitymg CaCO3/l 73 No limit 73 Bicarbonatemg HCO3/l 120Sampled May 2026 No limit 120
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 May 2026 ≤ 50 0.5 Fluoridemg F/l 0.19Sampled May 2026 ≤ 1.5 0.057 Mercuryμg Hg/l 0.5Sampled May 2026 ≤ 1 0.05 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 5 ≤ 50 1.5
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 1.7 No limit 1.7 Calciummg/l 31.4 No limit 31.4 Potassiummg/l 4.5Sampled May 2026 No limit 4.5 Chloridemg/l 36.3 ≤ 250 36.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 20Sampled May 2026 ≤ 200 20 Antimonyμg/l 1Sampled May 2026 ≤ 5 1 Arsenicμg/l 2Sampled May 2026 ≤ 10 1 Bariumμg/l 34Sampled May 2026 ≤ 1,000 34 Cadmiumμg/l 1Sampled May 2026 ≤ 5 1 Chromiumμg/l 5Sampled May 2026 ≤ 50 5 Ironμg/l 10 ≤ 200 10 Manganeseμg/l 10Sampled May 2026 ≤ 50 10 Leadμg/l 2Sampled Dec 2025 ≤ 10 0.1 Seleniumμg/l 2Sampled May 2026 ≤ 10 2 Sodiummg/l 25.2Sampled May 2026 ≤ 200 25.2
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled May 2026 No limit 0.005 Total Trihalomethanesμg/l 12.6Sampled May 2026 ≤ 100 0.63
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 2.1Sampled May 2026 ≤ 60 0.11
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled May 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled May 2026 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled May 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled May 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled May 2026 No limit 0.001 PFOSug/L 0.001Sampled May 2026 No limit 0.001 PFNAug/L 0.001Sampled May 2026 No limit 0.001 Total PFASug/L 0.029Sampled May 2026 ≤ 0.1 0.003 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 9.3 No limit 9.3 Uraniumug/L 10Sampled May 2026 No limit 10
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.
