# 1999 National Occupational Employment and Wage Estimates

### 51-8031 Water and Liquid Waste Treatment Plant and System Operators

Operate or control an entire process or system of machines, often through the use of control boards, to transfer or treat water or liquid waste.

These estimates are calculated with data collected from employers in all industry divisions in metropolitan and non-metropolitan areas in every State and the District of Columbia.

Employment estimate and mean wage estimates for this occupation:

Employment Mean hourly wage 81,830 RSE = 3.7 % \$15.07 RSE = 0.7 % \$31,350 RSE = 0.7 %
(1)   (3)

Percentile wage estimates for this occupation:

 Percentile Hourly Wage Annual Wage 10% 25% 50%(Median) 75% 90% \$9.04 \$11.34 \$14.46 \$18.16 \$22.00 \$18,810 \$23,590 \$30,070 \$37,770 \$45,760
(1)   (3)

About 1999 National, State, and Metropolitan Area Occupational Employment and Wage Estimates

Percentile wage estimates show what percentage of workers in an occupation earn less than a given wage and what percentage earn more. The median wage is the 50th percentile wage estimate—50 percent of workers earn less than the median and 50 percent of workers earn more than the median. More about percentile wages.

(1) Annual wages have been calculated by multiplying the hourly mean wage by a "year-round, full-time" hours figure of 2,080 hours; for those occupations where there is not an hourly mean wage published, the annual wage has been directly calculated from the reported survey data.

(3) = Wage rates for this occupation are calculated using three years of data: 1997, 1998, and 1999.

The relative standard error (RSE) is a measure of the reliability of a survey statistic. The smaller the relative standard error, the more precise the estimate.

1999 National Occupational Employment and Wage Estimates

1999 State Occupational Employment and Wage Estimates

1999 Metropolitan Area Occupational Employment and Wage Estimates

1999 National Industry-Specific Occupational Employment and Wage Estimates

Technical notes

List of Occupations in SOC Code Number Order

List of Occupations in Alphabetical Order