$63,936 – $140,784
state pay plan range, a year
4
classes in the state plan
$107,990
median pay in IL, all employers
940
workers in IL (SOC 17-2081)
Sources: Illinois Department of Central Management Services, Illinois CMS Alphabetic Index of Position Titles (FY 2027, effective July 1, 2026, corrected edition); U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May 2025 — state estimates. Data captured September 30, 2026.
Illinois state pay plan Sourced
Published rates for each class, lowest first, effective July 1, 2026. These are the ranges Illinois sets for its own state employees; cities, counties and school districts have their own pay plans.
| Class and grade | Published rate |
|---|---|
| Environmental Engineer I Class 13751 Grade RC-063-15-B · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $5,328.00 – $7,480.00 a month $63,936 – $89,760 a year 10 steps
|
Grade RC-063-15-Q · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $5,556.00 – $7,819.00 a month $66,672 – $93,828 a year 10 steps
|
Grade RC-063-15-S · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $5,656.00 – $7,937.00 a month $67,872 – $95,244 a year 10 steps
|
Grade MS-12-4 · Merit Compensation System salary ranges (MS) | $5,328.00 – $7,480.00 a month $63,936 – $89,760 a year |
| Environmental Engineer II Class 13752 Grade RC-063-17-B · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $5,834.00 – $8,307.00 a month $70,008 – $99,684 a year 10 steps
|
Grade RC-063-17-Q · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $6,082.00 – $8,683.00 a month $72,984 – $104,196 a year 10 steps
|
Grade RC-063-17-S · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $6,190.00 – $8,803.00 a month $74,280 – $105,636 a year 10 steps
|
Grade MS-16-4 · Merit Compensation System salary ranges (MS) | $5,834.00 – $8,307.00 a month $70,008 – $99,684 a year |
| Environmental Engineer III Class 13753 Grade RC-063-19-B · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $6,460.00 – $9,337.00 a month $77,520 – $112,044 a year 10 steps
|
Grade RC-063-19-Q · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $6,748.00 – $9,757.00 a month $80,976 – $117,084 a year 10 steps
|
Grade RC-063-19-S · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $6,856.00 – $9,876.00 a month $82,272 – $118,512 a year 10 steps
|
Grade MS-21-4 · Merit Compensation System salary ranges (MS) | $6,460.00 – $9,337.00 a month $77,520 – $112,044 a year |
| Environmental Engineer IV Class 13754 Grade RC-063-22-B · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $7,602.00 – $11,110.00 a month $91,224 – $133,320 a year 10 steps
|
Grade RC-063-22-Q · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $7,937.00 – $11,605.00 a month $95,244 – $139,260 a year 10 steps
|
Grade RC-063-22-S · RC-063 Professional Employees, Educators, Juvenile Justice School Counselors, Special Education Resources Coordinators, and Physicians | $8,055.00 – $11,732.00 a month $96,660 – $140,784 a year 10 steps
|
Grade MS-28-4 · Merit Compensation System salary ranges (MS) | $7,832.00 – $11,587.00 a month $93,984 – $139,044 a year |
Rates are as the plan publishes them; "a year" figures are conversions. Classes are matched to this job by title (GovJobsWiki editorial rule).
Source: Illinois Department of Central Management Services, Illinois CMS Alphabetic Index of Position Titles (FY 2027, effective July 1, 2026, corrected edition). Data captured September 30, 2026.
Pay in Illinois, all employers Sourced
Environmental Engineers (SOC 17-2081) in Illinois, all employers combined: BLS state estimates do not separate government from private.
| Measure | IL |
|---|---|
| Workers | 940 |
| 10th percentile | $71,990 |
| Median | $107,990 |
| 90th percentile | $153,150 |
| National median, government employers | $107,020 |
Sources: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May 2025 — state estimates; U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May 2025 — national estimates by ownership. Data captured September 30, 2026.
Free practice tests for Illinois
NCEES FE Environmental (Fundamentals of Engineering)Entrance or licensing exam · free on Open Exam Prep- NCEES Fundamentals of Engineering (FE) ExamEntrance or licensing exam · free on Open Exam Prep
- NCEES PE Environmental Engineering ExamEntrance or licensing exam · free on Open Exam Prep
Source: Open Exam Prep, Open Exam Prep free practice tests. Data captured October 1, 2026. Each link was opened and its exam title checked on the date shown.
More about this job
Requirements, hiring process, training, schedule and day-to-day work are on the national Environmental Engineer page.