Colilert-18®: Confidence, Quality and Efficiency in Water Testing

Colilert-18^®, from Idexx, has been trusted by water utilities worldwide for more than 20 years for the rapid and accurate detection of coliforms and E.coli in drinking water, sewage and raw water. Colilert-18 can be used on all raw water samples, whether from rivers or reservoirs.

Not only has it attained the worldwise ISO Standard 9308-2:2012, but it is also speicified as a reference method in the European Drinking Water Directive 2015/1787. In addition to the IDEXX Water QC laboratory being ISO 17025 accredited, the QC certificate for Colilert-18 is now ISO 11133 compliant.

The tests require no media preparation steps and sample preparation time is just one minute. Conclusive and confirmed results are available in 18 hours and the results are easy to intepret because positive results are indicated by a colour change.

Colilert-18 tests significantly reduce both false positive and false negative results and provide operators with results that are accurate, non-subjective and require no further confirmation steps.

Colilert-18 supresses the growth of non-target organisms while facilitating the growth of target species, making the test very specific and also highly sensitive. A single viable coliform or E. coli per 100 ml sample can be detected.