The median annual wage for Hydrologic Technicians in Illinois is $50,600 (May 2024 BLS OES). The mean (average) is $58,740.
Pay spans roughly $49,000 at the 10th percentile to $83,890 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $24.33 per hour.
| Median (annual) | $50,600 |
| Mean (annual) | $58,740 |
| Median (hourly) | $24.33 |
| 10th percentile | $49,000 |
| 90th percentile | $83,890 |
| Employment | — |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.