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A scoping study on the levels of antimicrobials and presence of antibiotic resistant bacteria in drinking water
Expanded Title:International and local studies have demonstrated that trace levels of antibiotics as well as the presence of antibiotic resistant bacteria (ARB) in source water and finished drinking water is an emerging health and water quality issue. The aim of this study was to provide an overview of the levels of antimicrobials and presence of antibiotic resistant bacteria in selected drinking water treatment systems (drinking water production facilities). Water samples for were collected from raw water and final drinking water at three drinking water supply agencies (DWPF A, B and C). Results presented demonstrated that some ARBs were present in the source water and may survive treatment. With regards to the presence of antimicrobial, agrochemicals and pharmaceutical personal care products (PPCPs), results obtained demonstrated that a cocktail of these organic substances enter DWPFs as part of the source water. The levels of these substances were very low (in the order of several ng/ℓ to close to 1000 ng/ℓ). These levels were generally reduced by the DWPF processes. In some cases the levels were reduced to below limits of detection. The diversity of substances indicate that both sewage and agricultural sources are potential origins of the pollution. This diversity raises questions about synergistic effects, with respect to antibiotic resistance selection, that these substance could have in the drinking water production systems.
Date Published:01/08/2016
Document Type:Research Report
Document Subjects:Drinking water - Water treatment
Document Keywords:Water Quality
Document Format:Report
Document File Type:pdf
Research Report Type:Consultant
WRC Report No:KV 360/16
ISBN No:978-1-4312-0823-4
Authors:Bezuidenhout CC; O’Reilly G; Sigudu MV; Ncube EJ
Project No:K8/1103//3).
Originator:WRC
Organizations:North West University; Rand Water
Document Size:416 KB
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