The average annual and hourly salaries for water and wastewater treatment plant and system operators in the state of Illinois are shown in Table 1 and Table 2, respectively. The comparison of the salary statistics of water and wastewater treatment plant and system operators among Illinois metropolitan areas is shown in Table 3. The salary statistics are based on the national compensation survey conducted by the U.S. Bureau of Labor Statistics in 2014 and published in May 2015 [1].
| Percentile Bracket | Average Annual Salary |
|---|---|
| 90th Percentile Wage | |
| 75th Percentile Wage | |
| 50th Percentile Wage | |
| 25th Percentile Wage | |
| 10th Percentile Wage |
Table 1 shows the average annual salary for water and wastewater treatment plant and system operators in Illinois in 5 percentile scales. The average annual salary for the 90th percentile (the top 10 percent of the highest paid) is $76,090. The median (50th percentile) annual salary is $51,270. The average annual salary for the bottom 10 percent is $27,650.
| Percentile Bracket | Average Hourly Salary |
|---|---|
| 90th Percentile Wage | |
| 75th Percentile Wage | |
| 50th Percentile Wage | |
| 25th Percentile Wage | |
| 10th Percentile Wage |
Table 2 shows the average hourly salary for water and wastewater treatment plant and system operators in Illinois in 5 percentile scales. The average hourly salary for the 90th percentile is $36.58. The median hourly salary is $24.65. The average hourly salary for the bottom 10 percent is $13.29.
| Year | Average Annual Salary | Growth (%) |
|---|---|---|
| 2014 | $51,270 | 2.03% |
| 2013 | $50,250 | 1.45% |
| 2012 | $49,530 | 7.23% |
| 2011 | $46,190 | 4.31% |
| 2010 | $44,280 | - |
Table 3 shows the salary trend for water and wastewater treatment plant and system operators in state of Illinois from 2010 to 2014. We note that from 2010 to 2014 the average salary has increased by 15.79%. We note that in 2013 the average salary increased by 1.45%. We also note that the average annual wage had a sizable growth of 7.23% in the year 2012 and a relatively large increase of 4.31% in 2011.
| Occupation | Average Wage |
|---|---|
| Water and Wastewater Treatment Plant and System Operators | |
| Chemical Plant and System Operators | |
| Gas Plant Operators | |
| Petroleum Pump System Operators, Refinery Operators, and Gaugers | |
| Other Plant and System Operators | |
| Nuclear Power Reactor Operators | |
| Power Distributors and Dispatchers |
Table 5 shows the median annual salary of water and wastewater treatment plant and system operators in some Illinois cities and metropolitan areas. We note that the median annual salary of water and wastewater treatment plant and system operators in state of Illinois ranges from $31,080 to $59,890. The highest paying area for water and wastewater treatment plant and system operators in Illinois is Springfield with a median annual salary of $59,890. The second highest paying city/area in Illinois State is Rockford (mean annual salary $59,850). The lowest paying area is West Central Illinois nonmetropolitan area with a median annual salary of $31,080.
