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CA PAYS BASQUE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.09 ● (Near the limit) 0.2 – 1 0.002 ▲ Total Chlorinemg CL2/l 0.15 No limit 0.03
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 12Sampled Dec 2025 No limit 12 Hardnessmg CaCO3/l 94.1Sampled Dec 2025 80 – 459 94.1 Hardness fF 9.41Sampled Dec 2025 No limit 9.41 pH 8.1 6.5 – 9.5 8.1 TurbidityNTU 0.5Sampled Dec 2025 ≤ 4 0.05 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 200Sampled Dec 2025 ≤ 2,500 200 TDSmg/l 128Sampled Dec 2025 estimated 0 – 1,199 128 Alkalinitymg CaCO3/l 89Sampled Dec 2025 No limit 89 Bicarbonatemg HCO3/l 139Sampled Nov 2025 No limit 139
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled Dec 2025 ≤ 0 0 eColiUFC/100ml 0 ≤ 0 0 BacteriasNMP/100ml 0Sampled Dec 2025 ≤ 0 0 EnterococcusUFC/100ml 0Sampled Dec 2025 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 5Sampled Mar 2026 ≤ 50 0.25 Fluoridemg F/l 0.05Sampled Mar 2026 ≤ 1.5 0.015 Mercuryμg Hg/l 0.015Sampled Mar 2026 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 1.5 ≤ 50 0.45
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 6.5Sampled Nov 2025 No limit 6.5 Calciummg/l 23.4Sampled Mar 2026 No limit 23.4 Potassiummg/l 0.33Sampled Mar 2026 No limit 0.33 Chloridemg/l 14 ≤ 250 14
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 5Sampled Nov 2025 ≤ 200 5 Antimonyμg/l 0.25Sampled Mar 2026 ≤ 5 0.25 Arsenicμg/l 0.25Sampled Mar 2026 ≤ 10 0.13 Bariumμg/l 18.5Sampled Mar 2026 ≤ 1,000 18.5 Cadmiumμg/l 0.025Sampled Mar 2026 ≤ 5 0.025 Chromiumμg/l 0.31Sampled Mar 2026 ≤ 50 0.31 Copperμg/l 2Sampled Mar 2026 ≤ 2,000 0.1 Ironμg/l 5Sampled Mar 2026 ≤ 200 5 Manganeseμg/l 2Sampled Nov 2025 ≤ 50 2 Leadμg/l 0.25Sampled Mar 2026 ≤ 10 0.013 Nickelμg/l 0.5Sampled Mar 2026 ≤ 20 0.5 Seleniumμg/l 0.25Sampled Nov 2025 ≤ 10 0.25 Sodiummg/l 3.32Sampled Mar 2026 ≤ 200 3.32
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Nov 2025 No limit 0.005 Total Trihalomethanesμg/l 15.6Sampled Dec 2025 ≤ 100 0.78
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Mar 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.1Sampled Nov 2025 ≤ 0.5 0.1
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Mar 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Mar 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.005Sampled Jul 2025 No limit 0.005 PFOSug/L 0.005Sampled Mar 2026 No limit 0.005 PFNAug/L 0.005Sampled Jul 2025 No limit 0.005 Total PFASug/L 0.1 ● (Near the limit) Sampled Mar 2026 ≤ 0.1 0.01 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 0.016 No limit 0.005 Sulfatemg/l 23 No limit 23 Uraniumug/L 0.1Sampled Mar 2026 No limit 0.1
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.
