3M™ Petrifilm™ Rapid Coliform Count Plates are designed to provide fast, accurate results in detecting coliform contamination²³‚ ²⁴‚ ²⁵
High coliform contamination can be detected beginning at 4 hours with distinctive yellow zones. Presumptive coliforms may be be recorded at 14 hours. Confirmed results are available at 24 hours²³‚ ²⁴‚²⁵
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