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Coliforms Test

  • Price

    $23 per analysis

  • Turnaround time

    7 - 9 Business Days

  • Rush

    Not Available

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Coliforms Test

Technical data sheet


Method description

Sample is pipetted onto selective media and incubated at 35°C for 24 hours.

Acceptable matrices

Foods and food ingredients

Unacceptable matrices

Cosmetics, non-food samples, water

Limit of quantitation

Solid food <10 CFU/g Liquid <1 CFU/g. The limit of quantitation can vary based on matrix.


Standard Micro Supplies

Method reference

AOAC 991.14

Reportable unit


Sample size requirements

100 g

Information required by submitter

Please supply estimates

Additional information

Coliform testing is used as an indicator of general sanitation. They are generally found in soil and water and are prevalent in raw agricultural commodities like flour. A high coliform count can be indicative of sanitation issues. E. coli is one of many species of coliforms and is an indicator of possible fecal contamination. E. coli counts will never be higher than coliform counts. Fecal contamination can never be inferred from coliform results alone. If a product has high coliform counts with no E. coli testing and information concerning possible fecal contamination is desired, the sample will need to be retested for E. coli.

*Prices and offerings are subject to change without notice.

Common Coliforms Test Testing Questions

While our sales and customer service team are happy to answer general testing questions, consultations typically start at a rate of $250 per 30 minutes regarding the interpretation of reported test results or questions about our test methods. We cannot consult on regulations, tolerance limits, or claims.

We make every effort to keep our methods and detection limits up to date according to the latest standards and qualifications. If you have any questions regarding the limit of detection/quantification or method references, please contact our Customer Service team at 1-800-245-5615.

Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.

Medallion Labs, a division of General Mills, offers multiple areas of expertise for analytical testing and product evaluation for the food and ingredient industry. Our areas of expertise include Chemical Analysis, Nutritional Analysis, Food Safety, Shelf Life Studies, Microbiology, Specialty Fibers, Physical Testing, Allergen Testing, as well as Product Evaluation (which includes Product Performance and Sensory Evaluation) and Technical Consulting/Method Development. Our methods are developed for the testing of food products and ingredients.

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Medallion Labs

A food testing program designed with mid-market and enterprise food and ingredient manufacturers in mind.