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SOCIETE GUYANAISE DES EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.82 0.2 – 1 0.016 ▲ Total Chlorinemg CL2/l 1.56 No limit 0.31
General General Parameter Unfiltered tap water Allowed range Filtered Hardnessmg CaCO3/l 98Sampled Mar 2025 80 – 459 98 Hardness fF 9.8Sampled Mar 2025 No limit 9.8 pH 7.4 6.5 – 9.5 7.4 TurbidityNTU 0.5 ≤ 4 0.05 ColorColor Units 0 ≤ 15 0 ConductivityμS / cm 19.5 ≤ 2,500 19.5 TDSmg/l 12.5estimated 0 – 1,199 12.5 Alkalinitymg CaCO3/l 117Sampled Mar 2025 No limit 117
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 Mercuryμg Hg/l Not reported ≤ 1 — Nitritesmg NO2/l 0.05Sampled Aug 2025 ≤ 0.5 0.02 Nitratesmg NO3/l 1Sampled Mar 2025 ≤ 50 0.3
Minerals Minerals Parameter Unfiltered tap water Allowed range Filtered Chloridemg/l 2.4Sampled Mar 2025 ≤ 250 2.4
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 50 ≤ 200 50 Antimonyμg/l 1Sampled Aug 2025 ≤ 5 1 Arsenicμg/l Not reported ≤ 10 — Cadmiumμg/l 0.5Sampled Aug 2025 ≤ 5 0.5 Chromiumμg/l 10Sampled Aug 2025 ≤ 50 10 Copperμg/l 76Sampled Aug 2025 ≤ 2,000 3.8 Ironμg/l 55 ≤ 200 55 Manganeseμg/l 10 ≤ 50 10 Leadμg/l 5Sampled Aug 2025 ≤ 10 0.25 Nickelμg/l 10Sampled Aug 2025 ≤ 20 10
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Total Trihalomethanesμg/l 0.81Sampled Aug 2025 ≤ 100 0.041
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 5Sampled Mar 2025 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.
