← Back to summary See all parameters SAINT DENIS DE GASTINES · Saint-Pierre-des-Landes
COMMUNAUTÉ DE COMMUNES DE L'ERNÉE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.17 ● (Near the limit) 0.2 – 1 0.003 ▲ Total Chlorinemg CL2/l 0.31 No limit 0.062
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 23 No limit 23 Hardnessmg CaCO3/l 172 80 – 459 172 Hardness fF 17.2 No limit 17.2 pH 7.8 6.5 – 9.5 7.8 TurbidityNTU 0.33 ≤ 4 0.033 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 417 ≤ 2,500 417 TDSmg/l 266.9estimated 0 – 1,199 266.9 Alkalinitymg CaCO3/l 155 No limit 155 Bicarbonatemg HCO3/l 103Sampled Feb 2026 No limit 103
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Feb 2026 ≤ 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 Feb 2026 ≤ 50 0.25 Fluoridemg F/l 0.13Sampled Feb 2026 ≤ 1.5 0.038 Mercuryμg Hg/l 0.01Sampled Feb 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 30 ≤ 50 9
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 6.1Sampled Feb 2026 No limit 6.1 Calciummg/l 29.7Sampled Feb 2026 No limit 29.7 Potassiummg/l 1.5Sampled Feb 2026 No limit 1.5 Chloridemg/l 20.3 ≤ 250 20.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 3Sampled Feb 2026 ≤ 200 3 Antimonyμg/l 0.1Sampled Feb 2026 ≤ 5 0.1 Arsenicμg/l 0.2Sampled Feb 2026 ≤ 10 0.1 Bariumμg/l 16Sampled Feb 2026 ≤ 1,000 16 Cadmiumμg/l 0.12Sampled Feb 2026 ≤ 5 0.12 Chromiumμg/l 0.7Sampled Feb 2026 ≤ 50 0.7 Copperμg/l 73.2Sampled May 2025 ≤ 2,000 3.66 Ironμg/l 15Sampled Feb 2026 ≤ 200 15 Manganeseμg/l 2Sampled Feb 2026 ≤ 50 2 Leadμg/l 0.2Sampled May 2025 ≤ 10 0.01 Nickelμg/l 3.4Sampled May 2025 ≤ 20 3.4 Seleniumμg/l 0.2Sampled Feb 2026 ≤ 10 0.2 Sodiummg/l 12.7Sampled Feb 2026 ≤ 200 12.7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Feb 2026 No limit 0.005 Total Trihalomethanesμg/l 13 ≤ 100 0.65
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 3.1 ≤ 60 0.16
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Feb 2026 ≤ 2 0 Heptachlorug/L 0.001Sampled Feb 2026 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Feb 2026 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Feb 2026 ≤ 70 0.02 Atrazineug/L 0.01Sampled Feb 2026 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Feb 2026 No limit 0.001 PFOSug/L 0.002Sampled Feb 2026 No limit 0.002 PFNAug/L 0.001Sampled Feb 2026 No limit 0.001 Total PFASug/L 0Sampled Feb 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 5.18 No limit 5.18 Uraniumug/L 0.1Sampled Feb 2026 No limit 0.1
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.
