17. Stationary engineers and boiler operators

Stationary engineers and boiler operators maintain or operate stationary engines, boilers, or other mechanical equipment to provide utilities for buildings or industrial processes.

Median annual salary: $59,400

Overall unhealthiness score: 57.7

Top three health risks:

1. Exposure to contaminants: 99

2. Exposure to hazardous conditions: 89

3. Exposure to minor burns, cuts, bites, or stings: 84