The median annual wage for Environmental Engineers in Illinois is $107,550 (May 2024 BLS OES). The mean (average) is $123,650.
Pay spans roughly $69,590 at the 10th percentile to $150,070 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $51.71 per hour. An estimated 1,410 people work as environmental engineers in Illinois.
| Median (annual) | $107,550 |
| Mean (annual) | $123,650 |
| Median (hourly) | $51.71 |
| 10th percentile | $69,590 |
| 90th percentile | $150,070 |
| Employment | 1,410 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.