← Back to summary See all parameters SAINT GERMAIN DE LA COUDRE · Vaunoise
SIAEP DU PERCHE SUD
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.22 0.2 – 1 0.004 ▲ Total Chlorinemg CL2/l 0.27 No limit 0.054
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 23 No limit 23 Hardnessmg CaCO3/l 363 80 – 459 363 Hardness fF 36.3 No limit 36.3 pH 7.6 6.5 – 9.5 7.6 TurbidityNTU 0.48 ≤ 4 0.048 ConductivityμS / cm 703 ≤ 2,500 703 TDSmg/l 449.9estimated 0 – 1,199 449.9 Alkalinitymg CaCO3/l 298 No limit 298 Bicarbonatemg HCO3/l 371Sampled Apr 2026 No limit 371
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Apr 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 Apr 2026 ≤ 50 0.5 Fluoridemg F/l 0.11Sampled Apr 2026 ≤ 1.5 0.032 Mercuryμg Hg/l 0.05Sampled Apr 2026 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 7.2 ≤ 50 2.16
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 12Sampled Apr 2026 No limit 12 Calciummg/l 130Sampled Apr 2026 No limit 130 Potassiummg/l 2.4Sampled Apr 2026 No limit 2.4 Chloridemg/l 18 ≤ 250 18
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Apr 2026 ≤ 200 2 Antimonyμg/l 0.5Sampled Apr 2026 ≤ 5 0.5 Arsenicμg/l 0.25Sampled Apr 2026 ≤ 10 0.13 Bariumμg/l 13Sampled Apr 2026 ≤ 1,000 13 Cadmiumμg/l 0.025Sampled Apr 2026 ≤ 5 0.025 Chromiumμg/l 1Sampled Apr 2026 ≤ 50 1 Ironμg/l 39.1 ≤ 200 39.1 Manganeseμg/l 1Sampled Apr 2026 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 1.1Sampled Apr 2026 ≤ 10 1.1 Sodiummg/l 7Sampled Apr 2026 ≤ 200 7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Apr 2026 No limit 0.003 Total Trihalomethanesμg/l 4.13Sampled Apr 2026 ≤ 100 0.21
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 0.9Sampled Apr 2026 ≤ 60 0.045
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Apr 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.038Sampled Apr 2026 ≤ 0.5 0.038
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Apr 2026 ≤ 70 0.02 Atrazineug/L 0.01Sampled Apr 2026 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.001Sampled Apr 2026 No limit 0.001 PFOSug/L 0.001Sampled Apr 2026 No limit 0.001 PFNAug/L 0.001Sampled Apr 2026 No limit 0.001 Total PFASug/L 0Sampled Apr 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 0.05 No limit 0.015 Sulfatemg/l 44 No limit 44 Uraniumug/L 0.23Sampled Apr 2026 No limit 0.23
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.
