Water and Wastewater Treatment Plant and System Operators Salary in Illinois (2025)
Official BLS OEWS data · May 2025 · 3,500 employed
Salary Percentile Breakdown
| Percentile | Annual |
|---|---|
10th Percentile Bottom 10% | $42,240 |
25th Percentile Lower quarter | $55,260 |
50th PercentileMedian Median | $67,810 |
75th Percentile Upper quarter | $83,140 |
90th Percentile Top 10% | $103,690 |
Salary Distribution
Annual Salary Range
10th
$42K
25th
$55K
Median
$68K
75th
$83K
90th
$104K
Illinois has a moderate number of Water and Wastewater Treatment Plant and System Operators positions (approximately 3,500), reflecting steady demand in this occupation.
In Illinois, Water and Wastewater Treatment Plant and System Operators salaries range from $42,240 at the 10th percentile to $103,690 at the 90th percentile — a spread of $61,450 (91% of the median). This wide range suggests significant variation based on experience and employer in this area.
Top Paying Cities in Illinois
Metro areas with highest Water and Wastewater Treatment Plant and System Operators wages
How Water and Wastewater Treatment Plant and System Operators Compares in Illinois
The average Water and Wastewater Treatment Plant and System Operators salary of $71,820 in Illinois ranks above the national average of $62,540. There are approximately 3,500 Water and Wastewater Treatment Plant and System Operatorss employed in Illinois.