← Back to summary See all parameters RESEAU ROCHES MAIGRES · Saint-Louis
RUNEO
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.67 0.2 – 1 0.013 ▲ Total Chlorinemg CL2/l 0.71 No limit 0.14
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 20.5 No limit 20.5 Hardnessmg CaCO3/l 110 80 – 459 110 Hardness fF 11 No limit 11 pH 8.2 6.5 – 9.5 8.2 TurbidityNTU 0.2 ≤ 4 0.02 ColorColor Units 10 ≤ 15 10 ConductivityμS / cm 330 ≤ 2,500 330 TDSmg/l 211.2estimated 0 – 1,199 211.2 Alkalinitymg CaCO3/l 126 No limit 126 Bicarbonatemg HCO3/l 144.4Sampled Sept 2025 No limit 144.4
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 10Sampled Jan 2026 ≤ 50 0.5 Fluoridemg F/l 0.14Sampled Jan 2026 ≤ 1.5 0.042 Mercuryμg Hg/l 0.01Sampled Jan 2026 ≤ 1 0.001 Nitritesmg NO2/l 0.05 ≤ 0.5 0.02 Nitratesmg NO3/l 2.4 ≤ 50 0.72
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 15Sampled Jan 2026 No limit 15 Calciummg/l 17Sampled Jan 2026 No limit 17 Potassiummg/l 1.9Sampled Jan 2026 No limit 1.9 Chloridemg/l 8.3 ≤ 250 8.3
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 30Sampled Jan 2026 ≤ 200 30 Antimonyμg/l 0.05Sampled Jan 2026 ≤ 5 0.05 Arsenicμg/l 0.14Sampled Jan 2026 ≤ 10 0.07 Bariumμg/l 1Sampled Jan 2026 ≤ 1,000 1 Cadmiumμg/l 0.01Sampled Jan 2026 ≤ 5 0.01 Chromiumμg/l 1.55Sampled Jan 2026 ≤ 50 1.55 Copperμg/l 0.93Sampled Jan 2026 ≤ 2,000 0.047 Ironμg/l 50Sampled Jan 2026 ≤ 200 50 Manganeseμg/l 0.35Sampled Jan 2026 ≤ 50 0.35 Leadμg/l 0.1Sampled Jan 2026 ≤ 10 0.005 Nickelμg/l 0.2Sampled Jan 2026 ≤ 20 0.2 Seleniumμg/l 0.5Sampled Jan 2026 ≤ 10 0.5 Sodiummg/l 27Sampled Jan 2026 ≤ 200 27
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jan 2026 No limit 0.005 Total Trihalomethanesμg/l 5Sampled Jan 2026 ≤ 100 0.25
Haloacetic acids Haloacetic acids Parameter Unfiltered tap water Allowed range Filtered Total haloacetic acidsμg/l 1Sampled Jan 2026 ≤ 60 0.05
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jan 2026 ≤ 0.4 0.005 Total pesticidesug/L 0Sampled Jan 2026 ≤ 0.5 0
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.02Sampled Jan 2026 ≤ 70 0.02 Atrazineug/L 0.005Sampled Jan 2026 ≤ 3 0.005
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0.002Sampled Jan 2026 No limit 0.002 PFOSug/L 0.002Sampled Jan 2026 No limit 0.002 PFNAug/L 0.002Sampled Jan 2026 No limit 0.002 Total PFASug/L 0.005Sampled Jan 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 0.05 No limit 0.015 Sulfatemg/l 37 No limit 37 Uraniumug/L 0.26Sampled Jan 2026 No limit 0.26
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.
