State comparison · 2025
Environmental Engineers salary: Illinois vs Louisiana
Environmental Engineers in Louisiana earn a median of $130,510. In Illinois, $107,990. After cost-of-living, the gap is 27% — not 17.3%.
Nominal pay gap
-17.3%
Illinois vs Louisiana
COL-adjusted gap
-27%
After BEA Regional Price Parities
Illinois
Environmental Engineers
- Median
- $107,990
- p25
- $87,090
- p75
- $123,960
- p10
- $71,990
- p90
- $153,150
- COL index (BEA RPP)100 = US average
- 100.0
- Hiring velocity (180d)
- -36%
Louisiana
Environmental Engineers
- Median
- $130,510
- p25
- $99,490
- p75
- $171,630
- p10
- $76,500
- p90
- $201,300
- COL index (BEA RPP)100 = US average
- 88.2
- Hiring velocity (180d)
- +100%
BLS Occupational Employment and Wage Statistics, May 2025. Cost-of-living adjustment from BEA Regional Price Parities (overall index). Hiring velocity from DOL OFLC public disclosure data, recent 180 days vs prior. See methodology.