← Back to summary See all parameters BELLOU LE TRICHARD · Vaunoise
SIAEP DU PERCHE SUD
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.11 ● (Near the limit) 0.2 – 1 0.002 ▲ Total Chlorinemg CL2/l 0.23 No limit 0.046
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24 No limit 24 Hardnessmg CaCO3/l 353 80 – 459 353 Hardness fF 35.3 No limit 35.3 pH 7.6 6.5 – 9.5 7.6 TurbidityNTU 0.2 ≤ 4 0.02 ConductivityμS / cm 717 ≤ 2,500 717 TDSmg/l 458.9estimated 0 – 1,199 458.9 Alkalinitymg CaCO3/l 303 No limit 303 Bicarbonatemg HCO3/l 366Sampled Feb 2026 No limit 366
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Oct 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 Feb 2026 ≤ 50 0.5 Fluoridemg F/l 0.085Sampled Feb 2026 ≤ 1.5 0.026 Mercuryμg Hg/l 0.05Sampled Feb 2026 ≤ 1 0.005 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 14 ≤ 50 4.2
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 12Sampled Feb 2026 No limit 12 Calciummg/l 130Sampled Feb 2026 No limit 130 Potassiummg/l 2.2Sampled Feb 2026 No limit 2.2 Chloridemg/l 21 ≤ 250 21
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 2Sampled Feb 2026 ≤ 200 2 Antimonyμg/l 0.5Sampled Feb 2026 ≤ 5 0.5 Arsenicμg/l 0.32Sampled Feb 2026 ≤ 10 0.16 Bariumμg/l 11Sampled Feb 2026 ≤ 1,000 11 Cadmiumμg/l 0.025Sampled Feb 2026 ≤ 5 0.025 Chromiumμg/l 1Sampled Feb 2026 ≤ 50 1 Ironμg/l 3.1 ≤ 200 3.1 Manganeseμg/l 1Sampled Feb 2026 ≤ 50 1 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 1.1Sampled Feb 2026 ≤ 10 1.1 Sodiummg/l 7Sampled Feb 2026 ≤ 200 7
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.05Sampled Feb 2026 No limit 0.003 Total Trihalomethanesμg/l 6.5Sampled Feb 2026 ≤ 100 0.33
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 1.1Sampled Feb 2026 ≤ 60 0.055
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Feb 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.044Sampled Feb 2026 ≤ 0.5 0.044
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 0.001Sampled Feb 2026 No limit 0.001 PFNAug/L 0.001Sampled Feb 2026 No limit 0.001 Total PFASug/L 0.001Sampled 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 0.05 No limit 0.015 Sulfatemg/l 39 No limit 39 Uraniumug/L 0.22Sampled Feb 2026 No limit 0.22
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.
