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SEASY (78)
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.4 0.2 – 1 0.008 ▲ Total Chlorinemg CL2/l 0.43 No limit 0.086
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 14.5 No limit 14.5 Hardnessmg CaCO3/l 338 80 – 459 338 Hardness fF 33.8 No limit 33.8 pH 7.4 6.5 – 9.5 7.4 TurbidityNTU 0.1 ≤ 4 0.01 ColorColor Units 5Sampled May 2026 ≤ 15 5 ConductivityμS / cm 671 ≤ 2,500 671 TDSmg/l 429.4estimated 0 – 1,199 429.4 Alkalinitymg CaCO3/l 261 No limit 261 Bicarbonatemg HCO3/l 329Sampled Aug 2025 No limit 329
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled May 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 10Sampled May 2026 ≤ 50 0.5 Fluoridemg F/l 0.15Sampled May 2026 ≤ 1.5 0.045 Mercuryμg Hg/l 0.5Sampled May 2026 ≤ 1 0.05 Nitritesmg NO2/l 0.051 ≤ 0.5 0.02 Nitratesmg NO3/l 29 ≤ 50 8.7
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 7.5Sampled May 2026 No limit 7.5 Calciummg/l 111.2Sampled May 2026 No limit 111.2 Potassiummg/l 1.9Sampled May 2026 No limit 1.9 Chloridemg/l 28 ≤ 250 28
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 2Sampled May 2026 ≤ 10 1 Bariumμg/l 52Sampled May 2026 ≤ 1,000 52 Cadmiumμg/l 1Sampled May 2026 ≤ 5 1 Chromiumμg/l 5Sampled May 2026 ≤ 50 5 Copperμg/l 251 ≤ 2,000 12.6 Ironμg/l 42Sampled May 2026 ≤ 200 42 Manganeseμg/l 10Sampled May 2026 ≤ 50 10 Leadμg/l 4.4 ≤ 10 0.22 Nickelμg/l 10.7 ≤ 20 10.7 Seleniumμg/l 3.9 ≤ 10 3.9 Sodiummg/l 12.9Sampled May 2026 ≤ 200 12.9
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 8.55Sampled May 2026 ≤ 100 0.43
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 0.9Sampled May 2026 ≤ 60 0.045
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Total pesticidesug/L 0.082Sampled May 2026 ≤ 0.5 0.082
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled May 2026 ≤ 70 0.02 Atrazineug/L 0.021Sampled May 2026 ≤ 3 0.021
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 0.007Sampled May 2026 ≤ 0.1 0.001 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 0.021 No limit 0.006 Perchlorateug/L 1.1Sampled Jan 2026 No limit 1.1 Sulfatemg/l 44.2 No limit 44.2 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.
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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.
