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Colilert Test


U.S. EPA-approved, 24-hour test for drinking and source waters.

International approvals include AOAC, IBWA, and EBWA.

Millions of tests performed worldwide every year.


Ease of use simplifies training.

Unit-dosed packaging eliminates media preparation.

No repeat testing due to clogged filters or heterotrophic interference.

Quality Control (QC) procedure can be done in 15 minutes.


Less than 1 minute of hands-on time.

Detects coliforms and E. coli simultaneously in 24 hours or less.

No confirmations needed.

No glassware cleaning or colony counting.


Identifies E. coli specifically, eliminating unnecessary public notification due to non-target organisms.

Suppresses up to 2 million heterotrophs per 100 mL.

Eliminates the subjective interpretation found in traditional methods.

Detects a single viable coliform or E. coli per sample.


Minimizes evening and weekend work.

Up to 12-month shelf life at room temperature.


Can be used for presence/absence (P/A) or quantification testing with Quanti-Tray and Quanti-Tray/2000.

The Colilert Test is also available predispensed in 10mL Most Probable Number (MPN) tubes.