GAP Water Quality & Management 2

Question 1

Which water source is generally considered the lowest risk for microbial contamination when used for direct contact irrigation of fresh produce?

Accepted Answer

Municipal treated water

Answer

Municipal treated water is disinfected to meet drinking water standards, making it the lowest-risk source for direct produce contact.

Question 2

Under GAP guidelines, what is the recommended action if water test results show generic E. coli levels exceeding safe thresholds for agricultural water?

Accepted Answer

Stop using the source until the problem is corrected

Answer

When water test results exceed safe thresholds, use of that source must be suspended until corrective actions bring levels back within acceptable limits.

Question 3

What is the primary advantage of drip irrigation over overhead sprinklers from a food safety perspective?

Accepted Answer

It delivers water directly to the root zone, minimizing contact with edible plant parts

Answer

Drip irrigation reduces direct water contact with edible portions of the crop, lowering the risk of transferring pathogens to the food product.

Question 4

Which biological indicator organism is most commonly used in GAP water testing to signal potential fecal contamination?

Accepted Answer

Generic E. coli

Answer

Generic E. coli is the standard indicator organism for fecal contamination in agricultural water because it is measurable, abundant, and correlates with enteric pathogen presence.

Question 5

A grower discovers that a dead animal is floating in the irrigation pond just before harvest. What is the best immediate response?

Accepted Answer

Remove the animal and retest the water before continuing irrigation

Answer

The carcass must be removed and the water retested because decomposing animals can rapidly elevate pathogen levels beyond safe thresholds.

(GAP) Good Agricultural Practices Certified Practice Test

(GAP) Good Agricultural Practices Certified Practice Test

GAP Water Quality & Management 2