← Back to summary See all parameters SIAEP DU VERNOY · Désandans
GAZ ET EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.31 0.2 – 1 0.006 ▲ Total Chlorinemg CL2/l 0.32 No limit 0.064
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 21.2 No limit 21.2 Hardnessmg CaCO3/l 114 80 – 459 114 Hardness fF 11.4 No limit 11.4 pH 8.2 6.5 – 9.5 8.2 TurbidityNTU 0.5 ≤ 4 0.05 ColorColor Units 5Sampled Jan 2025 ≤ 15 5 ConductivityμS / cm 234 ≤ 2,500 234 TDSmg/l 149.8estimated 0 – 1,199 149.8 Alkalinitymg CaCO3/l 110 No limit 110
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Jan 2025 ≤ 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 10Sampled May 2026 ≤ 50 0.5 Fluoridemg F/l 0.07Sampled May 2026 ≤ 1.5 0.021 Mercuryμg Hg/l 0.01Sampled May 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.02 ≤ 0.5 0.008 Nitratesmg NO3/l 4.4 ≤ 50 1.32
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 9Sampled May 2026 No limit 9 Calciummg/l 21Sampled May 2026 No limit 21 Potassiummg/l 2Sampled May 2026 No limit 2 Chloridemg/l 3 ≤ 250 3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 10Sampled May 2026 ≤ 200 10 Antimonyμg/l 1Sampled May 2026 ≤ 5 1 Arsenicμg/l 5.4 ≤ 10 2.7 Bariumμg/l 90Sampled May 2026 ≤ 1,000 90 Cadmiumμg/l 1Sampled May 2026 ≤ 5 1 Chromiumμg/l 5Sampled May 2026 ≤ 50 5 Copperμg/l 10Sampled May 2026 ≤ 2,000 0.5 Ironμg/l 10Sampled May 2026 ≤ 200 10 Manganeseμg/l 2Sampled May 2026 ≤ 50 2 Leadμg/l 2Sampled May 2026 ≤ 10 0.1 Nickelμg/l 5Sampled May 2026 ≤ 20 5 Seleniumμg/l 2Sampled May 2026 ≤ 10 2 Sodiummg/l 1.2Sampled May 2026 ≤ 200 1.2
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 2.24Sampled May 2026 ≤ 100 0.11
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 0.8Sampled May 2026 ≤ 60 0.04
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled May 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.5 ● (Near the limit) Sampled May 2026 ≤ 0.5 0.5 ●
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled May 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled May 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled May 2026 No limit 0.001 PFOSug/L 0.001Sampled May 2026 No limit 0.001 PFNAug/L 0.001Sampled May 2026 No limit 0.001 Total PFASug/L 0.029Sampled May 2026 ≤ 0.1 0.003 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 0.05 No limit 0.015 Sulfatemg/l 5.2 No limit 5.2 Uraniumug/L 10Sampled May 2026 No limit 10
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.
Your Water Quality
Independent information about tap water quality in France.
Brought to you by
tappwater.co
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.
