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MAIRIE DU RIALET
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.64 0.2 – 1 0.013 ▲ Total Chlorinemg CL2/l 0.7 No limit 0.14
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 18 No limit 18 Hardnessmg CaCO3/l 9 ● (Near the limit) 80 – 459 9 ● Hardness fF 0.9 No limit 0.9 pH 6.6 6.5 – 9.5 6.6 TurbidityNTU 0.18 ≤ 4 0.018 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 75 ≤ 2,500 75 TDSmg/l 48estimated 0 – 1,199 48 Alkalinitymg CaCO3/l 26 No limit 26 Bicarbonatemg HCO3/l 21Sampled Sept 2025 No limit 21
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 Sept 2025 ≤ 50 0.5 Fluoridemg F/l 0.05Sampled Sept 2025 ≤ 1.5 0.015 Mercuryμg Hg/l 0.01Sampled Sept 2025 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 4.5 ≤ 50 1.35
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 0.6 No limit 0.6 Calciummg/l 2.6 No limit 2.6 Potassiummg/l 1.8Sampled Sept 2025 No limit 1.8 Chloridemg/l 5 ≤ 250 5
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 24 ≤ 200 24 Antimonyμg/l 1Sampled May 2025 ≤ 5 1 Arsenicμg/l 2Sampled Sept 2025 ≤ 10 1 Bariumμg/l 23Sampled Sept 2025 ≤ 1,000 23 Cadmiumμg/l 1Sampled May 2025 ≤ 5 1 Chromiumμg/l 5Sampled May 2025 ≤ 50 5 Copperμg/l 72Sampled May 2025 ≤ 2,000 3.6 Ironμg/l 10Sampled Sept 2025 ≤ 200 10 Manganeseμg/l 29Sampled Sept 2025 ≤ 50 29 Leadμg/l 2Sampled May 2025 ≤ 10 0.1 Nickelμg/l 5Sampled May 2025 ≤ 20 5 Seleniumμg/l 2Sampled Sept 2025 ≤ 10 2 Sodiummg/l 8.8Sampled Sept 2025 ≤ 200 8.8
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Sept 2025 No limit 0.005 Total Trihalomethanesμg/l 4.15 ≤ 100 0.21
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Sept 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.005Sampled Sept 2025 ≤ 0.5 0.005
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Sept 2025 ≤ 70 0.02 Atrazineug/L 0.005Sampled Sept 2025 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Sept 2025 No limit 0.001 PFOSug/L 0.001Sampled Sept 2025 No limit 0.001 PFNAug/L 0.001Sampled Sept 2025 No limit 0.001 Total PFASug/L 0.029Sampled Sept 2025 ≤ 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 2.4 No limit 2.4
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.
