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CA PAYS BASQUE
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.1 ● (Near the limit) 0.2 – 1 0.002 ▲ Total Chlorinemg CL2/l 0.13 No limit 0.026
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 10Sampled Nov 2025 No limit 10 Hardnessmg CaCO3/l 7.46 ● (Near the limit) Sampled Nov 2025 80 – 459 7.46 ● Hardness fF 0.75Sampled Nov 2025 No limit 0.75 pH 7.2 6.5 – 9.5 7.2 TurbidityNTU 0.5Sampled Nov 2025 ≤ 4 0.05 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 49Sampled Nov 2025 ≤ 2,500 49 TDSmg/l 31.4Sampled Nov 2025 estimated 0 – 1,199 31.4 Alkalinitymg CaCO3/l 10Sampled Nov 2025 No limit 10 Bicarbonatemg HCO3/l 12.2Sampled May 2025 No limit 12.2
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered eColiUFC/100ml 0 ≤ 0 0 BacteriasNMP/100ml 0Sampled Nov 2025 ≤ 0 0 EnterococcusUFC/100ml 0Sampled Nov 2025 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 5Sampled Apr 2026 ≤ 50 0.25 Fluoridemg F/l 0.05Sampled Apr 2026 ≤ 1.5 0.015 Mercuryμg Hg/l 0.015Sampled Apr 2026 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 2.8 ≤ 50 0.84
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 1.19Sampled May 2025 No limit 1.19 Calciummg/l 2.04Sampled Apr 2026 No limit 2.04 Potassiummg/l 0.36Sampled Apr 2026 No limit 0.36 Chloridemg/l 5.6 ≤ 250 5.6
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 6.3Sampled May 2025 ≤ 200 6.3 Antimonyμg/l 0.25Sampled Apr 2026 ≤ 5 0.25 Arsenicμg/l 0.25Sampled Apr 2026 ≤ 10 0.13 Bariumμg/l 14.8Sampled Apr 2026 ≤ 1,000 14.8 Cadmiumμg/l 0.025Sampled Apr 2026 ≤ 5 0.025 Chromiumμg/l 0.31Sampled Apr 2026 ≤ 50 0.31 Copperμg/l 39.9Sampled Apr 2026 ≤ 2,000 2 Ironμg/l 5.72Sampled Apr 2026 ≤ 200 5.72 Manganeseμg/l 2Sampled May 2025 ≤ 50 2 Leadμg/l 0.58Sampled Apr 2026 ≤ 10 0.029 Nickelμg/l 0.75Sampled Apr 2026 ≤ 20 0.75 Seleniumμg/l 0.25Sampled May 2025 ≤ 10 0.25 Sodiummg/l 3.62Sampled Apr 2026 ≤ 200 3.62
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled May 2025 No limit 0.005 Total Trihalomethanesμg/l 1.28Sampled May 2025 ≤ 100 0.064
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Apr 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.1Sampled May 2025 ≤ 0.5 0.1
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Apr 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Apr 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.005Sampled Nov 2025 No limit 0.005 PFOSug/L 0.005Sampled Apr 2026 No limit 0.005 PFNAug/L 0.005Sampled Nov 2025 No limit 0.005 Total PFASug/L 0.1 ● (Near the limit) Sampled Apr 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 0.01 No limit 0.003 Sulfatemg/l 1.7 No limit 1.7 Uraniumug/L 0.1Sampled Apr 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.
