IDEXX Laboratories Inc., of West-brook, Maine, presents its Colisure® reagent that simultaneously detects total coliforms and E. coli in drinking water easily, rapidly and accurately. The product offers a distinct color change and a low false positive rate. It’s the only approved test that offers definitive results at 24 hours with the option to read up to 48 hours. It’s included in “Standard Methods for the Examination of Water and Wastewater?? (20th edition) as Method #9223.