Water and Wastewater Treatment Plant and System Operators Salary in Illinois
Also called: Water Treatment Plant Operators
Water and Wastewater Treatment Plant and System Operators in Illinois earn a median of $67,810 a year, +13% compared with the U.S. median.
Updated October 2026 · Data: BLS OEWS May 2025 · How we match careers
- Median pay
- $67,810
- vs. U.S. median
- +13% ($60,020)
- Rank among states
- 10 of 50
- Jobs in the state
- 3,500
Pay range in Illinois
The lowest-paid 10% earn under $42,240; the top 10% earn over $103,690. Nationally the range is $39,110 to $91,060.
States ranked near Illinois
Similar jobs in Illinois
- Biomass Plant Technicians$104,440 median in Illinois (broader BLS group)
- Gas Plant Operators$97,810 median in Illinois
- Petroleum Pump System Operators, Refinery Operators, and Gaugers$102,890 median in Illinois
- Wellhead Pumpers$51,440 median in Illinois
- Biofuels Processing Technicians$77,780 median in Illinois (broader BLS group)
- Hydroelectric Plant Technicians$104,440 median in Illinois (broader BLS group)
Water and Wastewater Treatment Plant and System Operators pay in Illinois
How much do water and wastewater treatment plant and system operators make in Illinois?
The median is $67,810 a year. The lowest-paid 10% earn under $42,240 and the top 10% earn over $103,690. BLS OEWS May 2025.
Is Illinois a good state for water and wastewater treatment plant and system operators?
On pay alone it ranks 10 of 50 (+13% vs. the national median of $60,020). Living costs are not included.