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CTE COMMUNES DU CLERMONTAIS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.22 0.2 – 1 0.004 ▲ Total Chlorinemg CL2/l 0.25 No limit 0.05
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 28.4 No limit 28.4 Hardnessmg CaCO3/l 292.9 80 – 459 292.9 Hardness fF 29.3 No limit 29.3 pH 7.69 6.5 – 9.5 7.69 TurbidityNTU 0.1 ≤ 4 0.01 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 620 ≤ 2,500 620 TDSmg/l 396.8estimated 0 – 1,199 396.8 Alkalinitymg CaCO3/l 243.5 No limit 243.5 Bicarbonatemg HCO3/l 284Sampled Jul 2026 No limit 284
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 Jul 2026 ≤ 50 0.5 Fluoridemg F/l 0.14Sampled Jul 2026 ≤ 1.5 0.042 Mercuryμg Hg/l 0.5Sampled Jul 2026 ≤ 1 0.05 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 3.2 ≤ 50 0.96
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 26.4 No limit 26.4 Calciummg/l 73.7 No limit 73.7 Potassiummg/l 2.1Sampled Jul 2026 No limit 2.1 Chloridemg/l 17.3 ≤ 250 17.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled Jul 2026 ≤ 200 10 Antimonyμg/l 1Sampled Jul 2026 ≤ 5 1 Arsenicμg/l 2Sampled Jul 2026 ≤ 10 1 Bariumμg/l 92Sampled Jul 2026 ≤ 1,000 92 Cadmiumμg/l 1Sampled Jul 2026 ≤ 5 1 Chromiumμg/l 5Sampled Jul 2026 ≤ 50 5 Ironμg/l 10Sampled Jul 2026 ≤ 200 10 Manganeseμg/l 10Sampled Jul 2026 ≤ 50 10 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Jul 2026 ≤ 10 2 Sodiummg/l 16.4Sampled Jul 2026 ≤ 200 16.4
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jul 2026 No limit 0.005 Total Trihalomethanesμg/l 37.6Sampled Jul 2026 ≤ 100 1.88
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 4.1Sampled Jul 2026 ≤ 60 0.21
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jul 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled Jul 2026 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jul 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Jul 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Jul 2026 No limit 0.001 PFOSug/L 0.001Sampled Jul 2026 No limit 0.001 PFNAug/L 0.001Sampled Jul 2026 No limit 0.001 Total PFASug/L 0.029Sampled Jul 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 105 No limit 105 Uraniumug/L 10Sampled Jul 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.
