Career Pathways

Education Required

Academic Subjects

NATURAL RESOURCES, ENVIRONMENT, AND AGRICULTURE
Environmental
Science
Technician
Math
Skill Check

  Skill Check 2

You have measured the concentration of mercury in sea water and organisms in a saltwater bay and recorded the results that are shown below. The concentration is measured in parts per million (ppm). You know that a mercury level of 0.2 ppm in the human body causes mercury poisoning, which can lead to kidney damage and eventual death.

How many times more concentrated is the mercury in the fish than in the sea water? Are the fish safe to eat?

ElementMercury Level
Sea water0.00004 ppm
Algae0.05 ppm
Fish0.4 ppm
Water birds2.8 ppm

Answer: