← Back to summary See all parameters SEM BASSE VALLEE DU GIER · Saint-Romain-en-Jarez
CHOLTON S.A.
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.03 ▲ (Outside the range) 0.2 – 1 0.001 ▲ Total Chlorinemg CL2/l 0.09 No limit 0.018
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24.8 No limit 24.8 Hardnessmg CaCO3/l 126.3 80 – 459 126.3 Hardness fF 12.6 No limit 12.6 pH 8 6.5 – 9.5 8 TurbidityNTU 0.1 ≤ 4 0.01 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 329 ≤ 2,500 329 TDSmg/l 210.6estimated 0 – 1,199 210.6 Alkalinitymg CaCO3/l 90.1 No limit 90.1
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 0.13Sampled May 2026 ≤ 1.5 0.039 Mercuryμg Hg/l 0.5Sampled May 2026 ≤ 1 0.05 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 15.5 ≤ 50 4.65
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 3.6 No limit 3.6 Calciummg/l 44.6 No limit 44.6 Potassiummg/l 2.2Sampled May 2026 No limit 2.2 Chloridemg/l 31.4 ≤ 250 31.4
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled May 2026 ≤ 200 10 Antimonyμg/l 1Sampled May 2026 ≤ 5 1 Arsenicμg/l 2Sampled May 2026 ≤ 10 1 Bariumμg/l 12Sampled May 2026 ≤ 1,000 12 Cadmiumμg/l 1Sampled May 2026 ≤ 5 1 Chromiumμg/l 5Sampled May 2026 ≤ 50 5 Copperμg/l 14Sampled May 2026 ≤ 2,000 0.7 Ironμg/l 14 ≤ 200 14 Manganeseμg/l 10Sampled May 2026 ≤ 50 10 Leadμg/l 2Sampled May 2026 ≤ 10 0.1 Nickelμg/l 5Sampled May 2026 ≤ 20 5 Seleniumμg/l 2Sampled May 2026 ≤ 10 2 Sodiummg/l 9.7Sampled May 2026 ≤ 200 9.7
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 31.3Sampled May 2026 ≤ 100 1.57
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 1.8Sampled May 2026 ≤ 60 0.09
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled May 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.015Sampled May 2026 ≤ 0.5 0.015
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 12.6 No limit 12.6 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.
