Water+microbiology [1796434] - Drinking Water Microbiology...

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Drinking Water Microbiology
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Microbial Analyses Water Total Bacterial count Tryptone Soy Fast Green Media (TSAF) Green or blue colonies Total Coliform count Lactose Monensin Glucoronate Agar (LMG) Blue colonies E coli Buffered MUG agar (BMA) Blue fluorescing colonies
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Table 1. New and revised Canadian drinking water guidelines Parameter Guideline (mg/L) Previous guideline (mg/L) CHE approval Microbiological parameters a Bacteriological 0 coliforms/100 mL E.ECOLI 0 per 100 mL 2006 TOTAL COLIFORMS forms 0 per 100 mL 2006 HETEROTROPHIC PLATE COUNT No numerical guideline required 2006 Emerging pathogens No numerical guideline required 2006 Protozoa No numerical guideline required None 2004 Enteric viruses No numerical guideline required None 2004 Turbidity 0.3/1.0/0.1 NTU b 1.0 NTU 2004
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ISO-GRID System
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ISO-GRID ISO-GRID microorganism detection systems are based on the
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Unformatted text preview: principles of hydrophobic grid membrane FltraTon (HGM±) • Flter units are placed onto a vacuum manifold, sample is added and vacuum applied • a²er the membrane has Fltered the sample, it is asepTcally removed, placed onto the appropriate media and incubated • microorganisms are contained within the boundaries of the hydrophobic grid lines making the results easy to interpret. 1,600 squares provides a broad counTng range and eliminates the need to analyze several diluTons • Colonies of fecal coliform bacteria from a water supply. Fecal coliform counts provide a general measure of the presence of pathogenic organisms in a water supply. • For drinking water, the current maximum contaminant level (MCL) for total coliforms, including fecal coliforms, is 0 colony/100 mL....
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