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MAIRIE DU RIALET
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.28 0.2 – 1 0.006 ▲ Total Chlorinemg CL2/l 0.29 No limit 0.058
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 11.9 No limit 11.9 Hardnessmg CaCO3/l 9.2 ● (Near the limit) 80 – 459 9.2 ● Hardness fF 0.92 No limit 0.92 pH 6 ● (Near the limit) 6.5 – 9.5 6 ● TurbidityNTU 0.17 ≤ 4 0.017 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 59 ≤ 2,500 59 TDSmg/l 37.8estimated 0 – 1,199 37.8 Alkalinitymg CaCO3/l 15.5 No limit 15.5
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 Mercuryμg Hg/l Not reported ≤ 1 — Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 4.34 ≤ 50 1.3
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 0.6 No limit 0.6 Calciummg/l 2.7 No limit 2.7 Chloridemg/l 4.2 ≤ 250 4.2
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 23 ≤ 200 23 Arsenicμg/l Not reported ≤ 10 — Leadμg/l Not reported ≤ 10 —
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Total Trihalomethanesμg/l 5.57Sampled Jan 2026 ≤ 100 0.28
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered Total PFASug/L Not reported ≤ 0.1 — 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 2.6 No limit 2.6
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.
