A Comparison of IDEXX Coliform and E. coli Tests

IDEXX coliform and e. coli tests offer you the flexibility to test multiple water samples for enterococci contamination, with results in 24 hours. Four products meet testing requirements around the world. The following information outlines the features of each test.

Colilert® Lowest cost and most popular Defined Substrate Technology® (DST®) test. U.S. EPA approved: Drinking and source water Included in Standard Methods for Examination of Water and Wastewater Time to results: 24–28 hours Shelf life: 12 months Quantification: Quanti-Tray®, Quanti-Tray®/2000 and MPN tubes Positive result: Yellow for coliform and fluorescent for E. coli

Colilert®-18 Ideal for afternoon and rush samples as well as real estate new well and new construction Time to results: 18–22 hours Shelf life: 15 months Quantification: Quanti-Tray®, Quanti-Tray®/2000 and MPN tubes Positive result: Yellow for coliform and fluorescent for E. coli

Colilert®-250 European market for bottled water Time to results: 24–28 hours Shelf life: 15 months Positive result: Yellow for coliform and fluorescent for E. coli

Colisure® Longest read window of 24–28 hours for read time flexibility Time to results: 24–28 hours Shelf life: 12 months Quantification: Quanti-Tray®, Quanti-Tray®/2000 and MPN tubes Read: Magenta for coliform and fluorescent for E. coli

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A Comparison of IDEXX Coliform and E. coli Tests