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SOCIETE GUYANAISE DES EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 2.41 ▲ (Outside the range) 0.2 – 1 0.048 ● Total Chlorinemg CL2/l 2.47 No limit 0.49
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 31.8 No limit 31.8 Hardnessmg CaCO3/l 17 ● (Near the limit) 80 – 459 17 ● Hardness fF 1.7 No limit 1.7 pH 6.1 ● (Near the limit) 6.5 – 9.5 6.1 ● TurbidityNTU 0.5 ≤ 4 0.05 ColorColor Units 2.5 ≤ 15 2.5 ConductivityμS / cm 57 ≤ 2,500 57 TDSmg/l 36.5estimated 0 – 1,199 36.5 Alkalinitymg CaCO3/l 20 No limit 20
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 Dec 2025 ≤ 50 0.5 Fluoridemg F/l 0.2Sampled Dec 2025 ≤ 1.5 0.06 Mercuryμg Hg/l 0.05Sampled Dec 2025 ≤ 1 0.005 Nitritesmg NO2/l 0.05 ≤ 0.5 0.02 Nitratesmg NO3/l 1 ≤ 50 0.3
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Magnesiummg/l 0.5Sampled Dec 2025 No limit 0.5 Calciummg/l 1.51Sampled Dec 2025 No limit 1.51 Potassiummg/l 0.5Sampled Dec 2025 No limit 0.5 Chloridemg/l 7.81 ≤ 250 7.81
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 50 ≤ 200 50 Arsenicμg/l 5Sampled Dec 2025 ≤ 10 2.5 Bariumμg/l 50Sampled Dec 2025 ≤ 1,000 50 Ironμg/l 50 ≤ 200 50 Manganeseμg/l 10 ≤ 50 10 Leadμg/l Not reported ≤ 10 — Seleniumμg/l 2Sampled Dec 2025 ≤ 10 2 Sodiummg/l 2.28Sampled Dec 2025 ≤ 200 2.28
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Dec 2025 No limit 0.005 Total Trihalomethanesμg/l 61.4 ≤ 100 3.07
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Dec 2025 ≤ 0.4 0.005 Total pesticidesug/L 0.1Sampled Dec 2025 ≤ 0.5 0.1
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.002Sampled Dec 2025 ≤ 70 0.002 Atrazineug/L 0.02Sampled Dec 2025 ≤ 3 0.02
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered Total PFASug/L Not reported ≤ 0.1 — 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 1 No limit 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.