Water and Wastewater Treatment Plant and System Operators Salary in St. Louis, MO (2026)
Source: BLS OEWS · St. Louis, MO-IL · 1,140 employed
The average Water and Wastewater Treatment Plant and System Operators salary in St. Louis, MO is $62,440 per year. The middle 50% of Water and Wastewater Treatment Plant and System Operatorss earn between $53,470 and $69,660. Top earners in the 90th percentile make $83,540 or more. Entry-level positions typically start around $44,180. The median of $58,910 is above the mean, reflecting the wage distribution in this field.
Water and Wastewater Treatment Plant and System Operators Salary Breakdown in St. Louis, MO
| Percentile | Annual Salary |
|---|---|
| 10th Percentile (Entry-level) | $44,180 |
| 25th Percentile | $53,470 |
| Median (50th Percentile) | $58,910 |
| Mean (Average) | $62,440 |
| 75th Percentile | $69,660 |
| 90th Percentile (Top earners) | $83,540 |
Related Jobs in St. Louis, MO
| Occupation | Mean Annual |
|---|---|
| Power Plant Operators | $93,450 |
| Power Distributors and Dispatchers | $86,130 |
| Computer Numerically Controlled Tool Programmers | $81,670 |
| First-Line Supervisors of Production and Operating Workers | $75,750 |
| Stationary Engineers and Boiler Operators | $75,540 |
| Aircraft Structure, Surfaces, Rigging, and Systems Assemblers | $66,910 |
Water and Wastewater Treatment Plant and System Operators Salaries in Other Cities
| City | Mean Annual |
|---|---|
| San Francisco, CA | $114,190 |
| San Jose, CA | $110,550 |
| Vallejo, CA | $96,620 |
| Napa, CA | $96,180 |
| Las Vegas, NV | $89,400 |
| Sacramento, CA | $88,910 |
| Salinas, CA | $88,900 |
| Santa Maria, CA | $87,090 |
Frequently Asked Questions
What is the average Water and Wastewater Treatment Plant and System Operators salary in St. Louis, MO?
The average Water and Wastewater Treatment Plant and System Operators salary in St. Louis, MO is $62,440 per year, according to BLS OEWS.
What is the median Water and Wastewater Treatment Plant and System Operators salary in St. Louis, MO?
The median Water and Wastewater Treatment Plant and System Operators salary in St. Louis, MO is $58,910 per year. Half of Water and Wastewater Treatment Plant and System Operatorss earn more than this and half earn less.
How much do entry-level Water and Wastewater Treatment Plant and System Operatorss make in St. Louis, MO?
Entry-level Water and Wastewater Treatment Plant and System Operatorss in St. Louis, MO typically earn around $44,180 per year (10th percentile). Workers in the 25th percentile earn about $53,470.
What do the highest-paid Water and Wastewater Treatment Plant and System Operatorss earn in St. Louis, MO?
The highest-paid Water and Wastewater Treatment Plant and System Operatorss in St. Louis, MO earn $83,540 or more per year (90th percentile). The 75th percentile wage is $69,660.
How many Water and Wastewater Treatment Plant and System Operatorss work in St. Louis, MO?
There are approximately 1,140 Water and Wastewater Treatment Plant and System Operatorss employed in the St. Louis, MO-IL area, per BLS OEWS.