Water and Wastewater Treatment Plant and System Operators Salary in St. Louis, MO-IL
BLS Occupational Employment & Wage Statistics • May 2025 • St. Louis, MO-IL
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Salary percentile breakdown
St. Louis economic context
Frequently asked questions
How much do Water and Wastewater Treatment Plant and System Operators make per hour in St. Louis?
The median hourly wage for Water and Wastewater Treatment Plant and System Operators in St. Louis, MO-IL is $28.32, based on BLS OEWS 2025 data. Top earners (90th percentile) make $39.26 or more per hour.
Is St. Louis above or below average for Water and Wastewater Treatment Plant and System Operators salaries?
The median Water and Wastewater Treatment Plant and System Operators salary in St. Louis, MO-IL is 1.1% above the national median of $58,260. The national figure is from BLS OEWS 2025 data covering all US metropolitan areas.
What is the entry-level salary for Water and Wastewater Treatment Plant and System Operators in St. Louis?
Entry-level Water and Wastewater Treatment Plant and System Operators (10th percentile) earn around $44,180 per year in St. Louis, MO-IL. The 25th percentile — typically workers with 1–3 years of experience — earn approximately $53,470.