← Back to summary See all parameters CHAILLAND · Saint-Germain-le-Guillaume
COMMUNAUTÉ DE COMMUNES DE L'ERNÉE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.16 ● (Near the limit) 0.2 – 1 0.003 ▲ Total Chlorinemg CL2/l 0.2 No limit 0.04
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 27.3 No limit 27.3 Hardnessmg CaCO3/l 121 80 – 459 121 Hardness fF 12.1 No limit 12.1 pH 7.5 6.5 – 9.5 7.5 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 331 ≤ 2,500 331 TDSmg/l 211.8estimated 0 – 1,199 211.8 Alkalinitymg CaCO3/l 97 No limit 97 Bicarbonatemg HCO3/l 115Sampled Jun 2026 No limit 115
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered 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 Sept 2025 ≤ 50 0.25 Fluoridemg F/l 0.098Sampled Sept 2025 ≤ 1.5 0.029 Mercuryμg Hg/l 0.015Sampled Sept 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 19 ≤ 50 5.7
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 7.8Sampled Jun 2026 No limit 7.8 Calciummg/l 34.7Sampled Jun 2026 No limit 34.7 Potassiummg/l 2.1Sampled Jun 2026 No limit 2.1 Chloridemg/l 22.7 ≤ 250 22.7
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Sept 2025 ≤ 200 2 Antimonyμg/l 4.9 ● (Near the limit) Sampled Oct 2025 ≤ 5 4.9 ● Arsenicμg/l 1.9Sampled Sept 2025 ≤ 10 0.95 Bariumμg/l 97Sampled Sept 2025 ≤ 1,000 97 Cadmiumμg/l 0.038Sampled Oct 2025 ≤ 5 0.038 Chromiumμg/l 0.3Sampled Oct 2025 ≤ 50 0.3 Copperμg/l 7.6 ≤ 2,000 0.38 Ironμg/l 1 ≤ 200 1 Manganeseμg/l 2 ≤ 50 2 Leadμg/l 0.1 ≤ 10 0.005 Nickelμg/l 4.5 ≤ 20 4.5 Seleniumμg/l 0.2Sampled Sept 2025 ≤ 10 0.2 Sodiummg/l 15.7Sampled Jun 2026 ≤ 200 15.7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Sept 2025 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 3.2 ≤ 60 0.16
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Sept 2025 ≤ 2 0 Heptachlorug/L 0.001Sampled Sept 2025 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Sept 2025 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Sept 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Sept 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Sept 2025 No limit 0.001 PFOSug/L 0.002Sampled Sept 2025 No limit 0.002 PFNAug/L 0.001Sampled Sept 2025 No limit 0.001 Total PFASug/L 0Sampled Sept 2025 ≤ 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 0.018 No limit 0.005 Sulfatemg/l 19.4 No limit 19.4
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.
