← Back to summary See all parameters ENTRAMMES · Parné-sur-Roc
CA LAVAL AGGLOMÉRATION
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.37 0.2 – 1 0.007 ▲ Total Chlorinemg CL2/l 0.55 No limit 0.11
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 20.1 No limit 20.1 Hardnessmg CaCO3/l 139 80 – 459 139 Hardness fF 13.9 No limit 13.9 pH 8.3 6.5 – 9.5 8.3 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 433 ≤ 2,500 433 TDSmg/l 277.1estimated 0 – 1,199 277.1 Alkalinitymg CaCO3/l 92 No limit 92 Bicarbonatemg HCO3/l 86Sampled Jan 2026 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 Cyanide totalμg CN/l 5Sampled Jan 2026 ≤ 50 0.25 Fluoridemg F/l 0.05Sampled Jan 2026 ≤ 1.5 0.015 Mercuryμg Hg/l 0.01Sampled Jan 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 16 ≤ 50 4.8
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 6.6Sampled Jan 2026 No limit 6.6 Calciummg/l 33.4Sampled Jan 2026 No limit 33.4 Potassiummg/l 3.8Sampled Jan 2026 No limit 3.8 Chloridemg/l 59 ≤ 250 59
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 28Sampled Jun 2026 ≤ 200 28 Antimonyμg/l 0.1Sampled Jan 2026 ≤ 5 0.1 Arsenicμg/l 0.2Sampled Jan 2026 ≤ 10 0.1 Bariumμg/l 19Sampled Jan 2026 ≤ 1,000 19 Cadmiumμg/l 0.02Sampled Jan 2026 ≤ 5 0.02 Chromiumμg/l 0.3Sampled Jan 2026 ≤ 50 0.3 Ironμg/l 5 ≤ 200 5 Manganeseμg/l 0.5 ≤ 50 0.5 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 0.2Sampled Jan 2026 ≤ 10 0.2 Sodiummg/l 17.7Sampled Jan 2026 ≤ 200 17.7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jan 2026 No limit 0.005
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Jan 2026 ≤ 2 0 Heptachlorug/L 0.001Sampled Jan 2026 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Jan 2026 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jan 2026 ≤ 70 0.02 Atrazineug/L 0.01Sampled Jan 2026 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Jan 2026 No limit 0.001 PFOSug/L 0.002Sampled Jan 2026 No limit 0.002 PFNAug/L 0.002Sampled Jan 2026 No limit 0.002 Total PFASug/L 0.005Sampled Jan 2026 ≤ 0.1 0.001 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 15.2 No limit 15.2 Uraniumug/L 0.02Sampled Jan 2026 No limit 0.02
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.
