The median annual wage for Chemical Plant and System Operators in St. Louis, MO-IL is $50,690 (May 2024 BLS OES). The mean (average) is $54,360.
Pay spans roughly $47,170 at the 10th percentile to $60,260 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $24.37 per hour. An estimated 210 people work as chemical plant and system operators in St. Louis, MO-IL.
| Median (annual) | $50,690 |
| Mean (annual) | $54,360 |
| Median (hourly) | $24.37 |
| 10th percentile | $47,170 |
| 90th percentile | $60,260 |
| Employment | 210 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.