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SIAEP LE HORPS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.24 0.2 – 1 0.005 ▲ Total Chlorinemg CL2/l 0.34 No limit 0.068
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 16 No limit 16 Hardnessmg CaCO3/l 131Sampled May 2026 80 – 459 131 Hardness fF 13.1Sampled May 2026 No limit 13.1 pH 7.9 6.5 – 9.5 7.9 TurbidityNTU 0.3Sampled May 2026 ≤ 4 0.03 ColorColor Units 5Sampled May 2026 ≤ 15 5 ConductivityμS / cm 330Sampled May 2026 ≤ 2,500 330 TDSmg/l 211.2Sampled May 2026 estimated 0 – 1,199 211.2 Alkalinitymg CaCO3/l 101Sampled May 2026 No limit 101 Bicarbonatemg HCO3/l 126Sampled Feb 2026 No limit 126
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0Sampled May 2026 ≤ 0 0 eColiUFC/100ml 0Sampled May 2026 ≤ 0 0 BacteriasNMP/100ml 0Sampled May 2026 ≤ 0 0 EnterococcusUFC/100ml 0Sampled May 2026 ≤ 0 0
Chemical parameters Chemical parameters Parameter Unfiltered tap water Allowed range Filtered Cyanide totalμg CN/l 5Sampled Feb 2026 ≤ 50 0.25 Fluoridemg F/l 0.15Sampled Feb 2026 ≤ 1.5 0.045 Mercuryμg Hg/l 0.01Sampled Feb 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.01Sampled May 2026 ≤ 0.5 0.004 Nitratesmg NO3/l 42 ● (Near the limit) Sampled May 2026 ≤ 50 12.6
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 7.3Sampled Feb 2026 No limit 7.3 Calciummg/l 38.6Sampled Feb 2026 No limit 38.6 Potassiummg/l 4.7Sampled Feb 2026 No limit 4.7 Chloridemg/l 14.4Sampled May 2026 ≤ 250 14.4
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 18Sampled Feb 2026 ≤ 200 18 Antimonyμg/l 0.1Sampled Feb 2026 ≤ 5 0.1 Arsenicμg/l 0.3 ≤ 10 0.15 Bariumμg/l 32Sampled Feb 2026 ≤ 1,000 32 Cadmiumμg/l 0.075Sampled Feb 2026 ≤ 5 0.075 Chromiumμg/l 0.4Sampled Feb 2026 ≤ 50 0.4 Copperμg/l 4Sampled Sept 2025 ≤ 2,000 0.2 Ironμg/l 11Sampled Feb 2026 ≤ 200 11 Manganeseμg/l 0.9Sampled Feb 2026 ≤ 50 0.9 Leadμg/l 0.2Sampled Sept 2025 ≤ 10 0.01 Nickelμg/l 2.1Sampled Sept 2025 ≤ 20 2.1 Seleniumμg/l 0.3Sampled Feb 2026 ≤ 10 0.3 Sodiummg/l 10.6Sampled Feb 2026 ≤ 200 10.6
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Feb 2026 No limit 0.005 Total Trihalomethanesμg/l 18 ≤ 100 0.9
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 6.5 ≤ 60 0.33
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Feb 2026 ≤ 2 0 Heptachlorug/L 0.001Sampled Feb 2026 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Feb 2026 ≤ 0.5 0
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 0.002Sampled Feb 2026 No limit 0.002 PFNAug/L 0.001Sampled Feb 2026 No limit 0.001 Total PFASug/L 0.003Sampled 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 0.01Sampled May 2026 No limit 0.003 Sulfatemg/l 11.1Sampled May 2026 No limit 11.1 Uraniumug/L 0.3Sampled Feb 2026 No limit 0.3
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.
