Fecal Coliform Testing Procedures

The video tutorial demonstrates how to perform a fecal coliform bacteria test. It covers the collection and preparation of water samples, conducting the test, interpreting results using a color chart, and post-test procedures for neutralizing and disposing of materials. The video emphasizes the importance of using the sample within 24 hours and provides guidelines for recording positive results. It concludes with credits to the National Great Rivers Research and Education Center.

What is the first step in conducting the fecal coliform bacteria test?

• Adding bleach to the sample

• Collecting a water sample from the field

• Using a plastic container for the sample

• Storing the sample in direct sunlight

How should the sample water be stored before testing?

• At room temperature

• In a freezer

• In a refrigerator

• In a warm place

What is the acceptable range for filling the glass vial with sample water?

• Close to 10 milliliters

• Exactly 10 milliliters

• Between 5 and 10 milliliters

• More than 10 milliliters

After how many hours should the vial be checked for color change?

• 48 hours

• 12 hours

• 24 hours

• 72 hours

What does a yellow color in the test indicate?

• Presence of less than 20 coliform colonies per 100 milliliters

• Presence of more than 20 coliform colonies per 100 milliliters

• Absence of coliform bacteria

• Presence of non-coliform bacteria

How is the number of coliform colonies adjusted for a 1000 milliliter sample?

• Multiply by 10

• Divide by 10

• Divide by 2

• Multiply by 2

What should be added to the coliform test tube after testing?

• Vinegar

• Salt

• Bleach

• Sugar

How long should the bleach-treated vial sit before disposal?

• 2 hours

• 3 hours

• 4 hours

• 1 hour

What should never be done with a used fecal coliform vial?

• Recycle it

• Sell it

• Reuse it

• Store it

Who created the video tutorial on the fecal coliform bacteria test?

• World Health Organization

• National Great Rivers Research and Education Center

• Environmental Protection Agency

• National Institute of Health