← Back to summary See all parameters MAYENNE · Madré
VEOLIA EAU-COMPAGNIE GENERALE DES EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.05 ● (Near the limit) 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 27 No limit 27 Hardnessmg CaCO3/l 112 80 – 459 112 Hardness fF 11.2 No limit 11.2 pH 8.1 6.5 – 9.5 8.1 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 444 ≤ 2,500 444 TDSmg/l 284.2estimated 0 – 1,199 284.2 Alkalinitymg CaCO3/l 86 No limit 86
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 11 ≤ 50 3.3
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Chloridemg/l 57.3 ≤ 250 57.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Antimonyμg/l 0.2Sampled Jul 2025 ≤ 5 0.2 Arsenicμg/l Not reported ≤ 10 — Cadmiumμg/l 0.01Sampled Jul 2025 ≤ 5 0.01 Chromiumμg/l 0.8Sampled Jul 2025 ≤ 50 0.8 Copperμg/l 30.8Sampled Jun 2026 ≤ 2,000 1.54 Ironμg/l 73 ≤ 200 73 Manganeseμg/l 4 ≤ 50 4 Leadμg/l 0.4Sampled Jun 2026 ≤ 10 0.02 Nickelμg/l 1.3Sampled Jun 2026 ≤ 20 1.3
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Total Trihalomethanesμg/l 30Sampled Jul 2026 ≤ 100 1.5
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 9.1Sampled Jun 2026 ≤ 60 0.46
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 35.7 No limit 35.7
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.
