Environmental Science and Protection Technicians, Including Health Salary in Chicago-Naperville-Elgin, IL-IN
According to the latest U.S. Bureau of Labor Statistics data, the median annual wage for Environmental Science and Protection Technicians, Including Health in Chicago-Naperville-Elgin, IL-IN is $60,380. BLS estimates approximately 690 people work in this occupation in Chicago-Naperville-Elgin, IL-IN. Chicago-Naperville-Elgin, IL-IN is 9.6% above the national median ($55,090).
Salary Distribution
Not everyone earns the median. Percentile wages show the range of pay within this occupation.
| Percentile | Annual wage | Hourly wage |
|---|---|---|
| 10th percentile | $43,090 | $20.72 |
| 25th percentile | $49,200 | $23.65 |
| Median (50th) | $60,380 | $29.03 |
| 75th percentile | $78,520 | $37.75 |
| 90th percentile | $99,120 | $47.66 |
Data Reliability
BLS OEWS is a survey, not a full census — every estimate carries a margin of error. The relative standard error (RSE) below is BLS’s own measure of how much an estimate could vary; lower is more precise.
- Wage estimate
- RSE 5.3% — Reliable
- Employment estimate
- RSE 12.4% — Reliable
Where Does Your Salary Fall?
Enter an annual salary to see roughly where it falls among reported wages for this occupation, based on the percentile points above.
Concentration
- Jobs per 1,000
- 0.152
- Location quotient
- 0.68
Cost-of-Living Adjusted Salary
Chicago-Naperville-Elgin, IL-IN’s regional price level is above the national average (index 103.595, where 100 = U.S. average). Adjusted for that, the median salary has the purchasing power of $58,285 at the national price level.
This is a Career Atlas USA calculation based on BLS wage data and BEA Regional Price Parities. It is not a separate BLS wage estimate. Wage data: May 2025. Cost-of-living data: 2024.
Sources
Wage data: BLS Occupational Employment and Wage Statistics (OEWS) — May 2025 (release 25).
Figures shown as “Not available” reflect wages the source does not publish (e.g. suppressed for reliability), not zero.