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COMMUNAUTÉ DE COMMUNES DE L'ERNÉE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.59 0.2 – 1 0.012 ▲ Total Chlorinemg CL2/l 0.63 No limit 0.13
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 26.1 No limit 26.1 Hardnessmg CaCO3/l 161 80 – 459 161 Hardness fF 16.1 No limit 16.1 pH 8 6.5 – 9.5 8 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 585 ≤ 2,500 585 TDSmg/l 374.4estimated 0 – 1,199 374.4 Alkalinitymg CaCO3/l 121 No limit 121 Bicarbonatemg HCO3/l 143Sampled May 2026 No limit 143
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 5Sampled May 2026 ≤ 50 0.25 Fluoridemg F/l 0.05Sampled May 2026 ≤ 1.5 0.015 Mercuryμg Hg/l 0.01Sampled May 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 37 ≤ 50 11.1
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 6.3Sampled May 2026 No limit 6.3 Calciummg/l 46.6Sampled May 2026 No limit 46.6 Potassiummg/l 4.7Sampled May 2026 No limit 4.7 Chloridemg/l 45.4 ≤ 250 45.4
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 4Sampled May 2026 ≤ 200 4 Antimonyμg/l 0.1Sampled May 2026 ≤ 5 0.1 Arsenicμg/l 0.2Sampled May 2026 ≤ 10 0.1 Bariumμg/l 30Sampled May 2026 ≤ 1,000 30 Cadmiumμg/l 0.02Sampled May 2026 ≤ 5 0.02 Chromiumμg/l 0.4Sampled May 2026 ≤ 50 0.4 Copperμg/l 37.6Sampled Jun 2026 ≤ 2,000 1.88 Ironμg/l 3 ≤ 200 3 Manganeseμg/l 0.6 ≤ 50 0.6 Leadμg/l 0.9Sampled Jun 2026 ≤ 10 0.045 Nickelμg/l 1.7Sampled Jun 2026 ≤ 20 1.7 Seleniumμg/l 0.2Sampled May 2026 ≤ 10 0.2 Sodiummg/l 45.3Sampled May 2026 ≤ 200 45.3
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 23 ≤ 100 1.15
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 5.1 ≤ 60 0.26
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled May 2026 ≤ 2 0 Heptachlorug/L 0.001Sampled May 2026 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled May 2026 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled May 2026 ≤ 70 0.02 Atrazineug/L 0.01Sampled May 2026 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled May 2026 No limit 0.001 PFOSug/L 0.002Sampled May 2026 No limit 0.002 PFNAug/L 0.001Sampled May 2026 No limit 0.001 Total PFASug/L 0Sampled May 2026 ≤ 0.1 0 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 70 No limit 70 Uraniumug/L 0.03Sampled May 2026 No limit 0.03
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.
