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SOCIETE GUYANAISE DES EAUX
Water safety Water safety Parameter Unfiltered tap water Allowed range Filtered Free Chlorinemg CL2/l 0.23 0.2 – 1 0.005 ▲ Total Chlorinemg CL2/l 0.28 No limit 0.056
General General Parameter Unfiltered tap water Allowed range Filtered TemperatureC 31.7 No limit 31.7 Hardnessmg CaCO3/l 33 ● (Near the limit) 80 – 459 33 ● Hardness fF 3.3 No limit 3.3 pH 6.8 6.5 – 9.5 6.8 TurbidityNTU 0.5 ≤ 4 0.05 ColorColor Units 2.5 ≤ 15 2.5 ConductivityμS / cm 141Sampled May 2026 ≤ 2,500 141 TDSmg/l 90.2Sampled May 2026 estimated 0 – 1,199 90.2 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 May 2026 ≤ 50 0.5 Fluoridemg F/l 0.2Sampled May 2026 ≤ 1.5 0.06 Mercuryμg Hg/l 0.05Sampled May 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 May 2026 No limit 0.5 Calciummg/l 20.9Sampled May 2026 No limit 20.9 Potassiummg/l 0.5Sampled May 2026 No limit 0.5 Chloridemg/l 6.33 ≤ 250 6.33
Metals Metals Parameter Unfiltered tap water Allowed range Filtered Aluminiumμg/l 152 ≤ 200 152 Antimonyμg/l 1Sampled May 2026 ≤ 5 1 Arsenicμg/l 5Sampled May 2026 ≤ 10 2.5 Bariumμg/l 50Sampled May 2026 ≤ 1,000 50 Cadmiumμg/l 0.5Sampled May 2026 ≤ 5 0.5 Chromiumμg/l 10Sampled May 2026 ≤ 50 10 Copperμg/l 50Sampled May 2026 ≤ 2,000 2.5 Ironμg/l 196 ● (Near the limit) Sampled May 2026 ≤ 200 196 ● Manganeseμg/l 10Sampled May 2026 ≤ 50 10 Leadμg/l 5Sampled May 2026 ≤ 10 0.25 Nickelμg/l 10Sampled May 2026 ≤ 20 10 Seleniumμg/l 2Sampled May 2026 ≤ 10 2 Sodiummg/l 2.43Sampled May 2026 ≤ 200 2.43
Chlorine by-products Chlorine by-products Parameter Unfiltered tap water Allowed range Filtered Trichloroethyleneμg/l 0.1Sampled May 2026 No limit 0.005 Total Trihalomethanesμg/l 57.1 ≤ 100 2.86
Pesticides Pesticides Parameter Unfiltered tap water Allowed range Filtered Heptachlorug/L 0.005Sampled May 2026 ≤ 0.4 0.005 Total pesticidesug/L 0.1Sampled May 2026 ≤ 0.5 0.1
Herbicides Herbicides Parameter Unfiltered tap water Allowed range Filtered D 2 4ug/L 0.002Sampled May 2026 ≤ 70 0.002 Atrazineug/L 0.002Sampled May 2026 ≤ 3 0.002
Perfluorinated chemicals Perfluorinated chemicals Parameter Unfiltered tap water Allowed range Filtered PFOAug/L 0Sampled May 2026 No limit 0 PFOSug/L 0Sampled May 2026 No limit 0 PFNAug/L 0Sampled May 2026 No limit 0 Total PFASug/L 0.3 ▲ (Outside the range) Sampled May 2026 ≤ 0.1 0.03 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 19.5 No limit 19.5 Uraniumug/L 0.05Sampled May 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.
