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SOCIETE GUYANAISE DES EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 1.41 ▲ (Outside the range) 0.2 – 1 0.028 ▲ Total Chlorinemg CL2/l 1.44 No limit 0.29
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 28.8 No limit 28.8 Hardnessmg CaCO3/l 22 ● (Near the limit) 80 – 459 22 ● Hardness fF 2.2 No limit 2.2 pH 7.4 6.5 – 9.5 7.4 TurbidityNTU 1 ≤ 4 0.1 ColorColor Units 5 ≤ 15 5 ConductivityμS / cm 73 ≤ 2,500 73 TDSmg/l 46.7estimated 0 – 1,199 46.7 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 Jun 2026 ≤ 50 0.5 Fluoridemg F/l 0.2Sampled Jun 2026 ≤ 1.5 0.06 Mercuryμg Hg/l 0.05Sampled Jun 2026 ≤ 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 Jun 2026 No limit 0.5 Calciummg/l 9.34Sampled Jun 2026 No limit 9.34 Potassiummg/l 0.5Sampled Jun 2026 No limit 0.5 Chloridemg/l 3.41 ≤ 250 3.41
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 575 ▲ (Outside the range) ≤ 200 575 ▲ Antimonyμg/l 1Sampled Jun 2026 ≤ 5 1 Arsenicμg/l 5Sampled Jun 2026 ≤ 10 2.5 Bariumμg/l 50Sampled Jun 2026 ≤ 1,000 50 Cadmiumμg/l 0.5Sampled Jun 2026 ≤ 5 0.5 Chromiumμg/l 10Sampled Jun 2026 ≤ 50 10 Copperμg/l 50Sampled Jun 2026 ≤ 2,000 2.5 Ironμg/l 109 ≤ 200 109 Manganeseμg/l 10 ≤ 50 10 Leadμg/l 5Sampled Jun 2026 ≤ 10 0.25 Nickelμg/l 10Sampled Jun 2026 ≤ 20 10 Seleniumμg/l 2Sampled Jun 2026 ≤ 10 2 Sodiummg/l 1.57Sampled Jun 2026 ≤ 200 1.57
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled Jun 2026 No limit 0.005 Total Trihalomethanesμg/l 44.4 ≤ 100 2.22
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled Jun 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.1Sampled Jun 2026 ≤ 0.5 0.1
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.002Sampled Jun 2026 ≤ 70 0.002 Atrazineug/L 0.03Sampled Jun 2026 ≤ 3 0.03
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0Sampled Jun 2026 No limit 0 PFOSug/L 0Sampled Jun 2026 No limit 0 PFNAug/L 0Sampled Jun 2026 No limit 0 Total PFASug/L 0Sampled Jun 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 0.05 No limit 0.015 Sulfatemg/l 15.1 No limit 15.1 Uraniumug/L 0.05Sampled Jun 2026 No limit 0.05
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.
