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SIAEP LE HORPS
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.13 ● (Near the limit) 0.2 – 1 0.003 ▲ Total Chlorinemg CL2/l 0.21 No limit 0.042
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 24 No limit 24 Hardnessmg CaCO3/l 114 80 – 459 114 Hardness fF 11.4 No limit 11.4 pH 7.2 6.5 – 9.5 7.2 TurbidityNTU 0.3 ≤ 4 0.03 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 275 ≤ 2,500 275 TDSmg/l 176estimated 0 – 1,199 176 Alkalinitymg CaCO3/l 91 No limit 91 Bicarbonatemg HCO3/l 108Sampled Feb 2026 No limit 108
Pathogens Pathogens Parameter Unfiltered tap water Allowed range Filtered ClostridiumUFC/100ml 0 ≤ 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 5Sampled Jan 2025 ≤ 50 0.25 Fluoridemg F/l 0.13Sampled Jan 2025 ≤ 1.5 0.038 Mercuryμg Hg/l 0.015Sampled Jan 2025 ≤ 1 0.002 Nitritesmg NO2/l 0.01 ≤ 0.5 0.004 Nitratesmg NO3/l 19 ≤ 50 5.7
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 4.6Sampled Feb 2026 No limit 4.6 Calciummg/l 32.4Sampled Feb 2026 No limit 32.4 Potassiummg/l 0.9Sampled Feb 2026 No limit 0.9 Chloridemg/l 16.8 ≤ 250 16.8
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 31Sampled Jan 2025 ≤ 200 31 Antimonyμg/l 0.2Sampled Sept 2025 ≤ 5 0.2 Arsenicμg/l 0.2Sampled Jan 2025 ≤ 10 0.1 Bariumμg/l 21Sampled Jan 2025 ≤ 1,000 21 Cadmiumμg/l 0.058Sampled Sept 2025 ≤ 5 0.058 Chromiumμg/l 0.6Sampled Sept 2025 ≤ 50 0.6 Copperμg/l 98.5 ≤ 2,000 4.93 Ironμg/l 8Sampled Sept 2025 ≤ 200 8 Manganeseμg/l 4Sampled Jan 2025 ≤ 50 4 Leadμg/l 1 ≤ 10 0.05 Nickelμg/l 1.1 ≤ 20 1.1 Seleniumμg/l 0.2Sampled Jan 2025 ≤ 10 0.2 Sodiummg/l 6.4Sampled Feb 2026 ≤ 200 6.4
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jan 2025 No limit 0.005 Total Trihalomethanesμg/l 14Sampled Sept 2025 ≤ 100 0.7
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Chlordaneug/L 0Sampled Jan 2025 ≤ 2 0 Heptachlorug/L 0.001Sampled Jan 2025 ≤ 0.4 0.001 Total pesticidesug/L 0Sampled Jan 2025 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jan 2025 ≤ 70 0.02 Atrazineug/L 0.01Sampled Jan 2025 ≤ 3 0.01
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Jul 2025 No limit 0.002 PFOSug/L 0.004Sampled Jul 2025 No limit 0.004 PFNAug/L 0.002Sampled Jul 2025 No limit 0.002 Total PFASug/L 0Sampled Jul 2025 ≤ 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 0.013 No limit 0.004 Sulfatemg/l 5 No limit 5
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.
