Occupational Employment Statistics

Occupational Employment and Wages, November 2004

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.

National estimates for this occupation
Industry profile for this occupation
State profile for this occupation
Metropolitan area profile for this occupation

National estimates for this occupation: Top

Employment estimate and mean wage estimates for this occupation:

Employment (1) Employment
RSE (3)
Mean hourly
wage
Mean annual
wage (2)
Wage RSE (3)
93,330 2.2 % $17.24 $35,850 0.6 %

Percentile wage estimates for this occupation:

Percentile 10% 25% 50%
(Median)
75% 90%
Hourly Wage $10.18 $12.99 $16.75 $20.96 $25.62
Annual Wage (2) $21,160 $27,010 $34,850 $43,600 $53,290

Industry profile for this occupation: Top

Industries with the highest levels of employment in this occupation:

Industry Employment Hourly mean wage Annual mean wage
Local government (OES designation) 72,950 $17.16 $35,690
Water, sewage and other systems 8,960 $16.44 $34,200
Waste treatment and disposal 1,290 $16.65 $34,620
Power generation and supply 910 $22.37 $46,530
State government (OES designation) 670 $19.75 $41,090

Top paying industries for this occupation:

Industry Employment Hourly mean wage Annual mean wage
Pharmaceutical and medicine manufacturing 280 $25.32 $52,670
Natural gas distribution 170 $24.66 $51,300
Aerospace product and parts manufacturing 110 $23.25 $48,370
Motor vehicle parts manufacturing 140 $23.13 $48,110
Power generation and supply 910 $22.37 $46,530

State profile for this occupation: Top

States with the highest concentration of workers in this occupation:

State Employment Hourly mean wage Annual mean wage Percent of State employment
Alaska 590 $19.01 $39,540 0.199%
North Dakota 590 $15.83 $32,930 0.182%
West Virginia 1,090 $12.91 $26,850 0.157%
South Dakota 560 $15.35 $31,930 0.151%
Iowa 1,840 $16.16 $33,620 0.128%

Top paying States for this occupation:

State Employment Hourly mean wage Annual mean wage Percent of State employment
Nevada (7) $23.28 $48,430 (7)
California 7,330 $23.06 $47,970 0.050%
Washington 910 $21.86 $45,460 0.035%
New Jersey 1,500 $20.89 $43,450 0.038%
Connecticut 840 $20.57 $42,780 0.051%

Metropolitan area profile for this occupation: Top

Metropolitan areas with the highest concentration of workers in this occupation:

MSA Employment Hourly mean wage Annual mean wage Percent of MSA employment
Jacksonville, NC MSA 100 $17.99 $37,410 0.252%
San Luis Obispo-Atascadero-Paso Robles, CA MSA 250 $19.82 $41,230 0.247%
State College, PA MSA 140 $14.03 $29,180 0.217%
Yuba City, CA MSA 80 $17.09 $35,540 0.201%
New London-Norwich, CT-RI MSA 290 $17.53 $36,450 0.199%

Top paying Metropolitan areas for this occupation:

MSA Employment Hourly mean wage Annual mean wage Percent of MSA employment
Oakland, CA PMSA 560 $29.18 $60,700 0.056%
San Francisco, CA PMSA 200 $27.91 $58,060 0.021%
Vallejo-Fairfield-Napa, CA PMSA 120 $27.19 $56,560 0.064%
Los Angeles-Long Beach, CA PMSA 1,000 $26.13 $54,360 0.025%
Seattle-Bellevue-Everett, WA PMSA 200 $25.38 $52,790 0.015%

About November 2004 National, State, and Metropolitan Area Occupational Employment and Wage Estimates

These estimates are calculated with data collected from employers in all industry sectors in metropolitan and non-metropolitan areas in every State and the District of Columbia. The top five employment and wage figures are provided above. The complete list is available in the downloadable Excel files(XLS).

Percentile wage estimates show the percentage of workers in an occupation that earn less than a given wage and the percentage that 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) Estimates for detailed occupations do not sum to the totals because the totals include occupations not shown separately. Estimates do not include self-employed workers.

(2) 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) 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.

(7) Estimate not released.

All Production Occupations

November 2004 National Occupational Employment and Wage Estimates

November 2004 State Occupational Employment and Wage Estimates

November 2004 Metropolitan Area Occupational Employment and Wage Estimates

November 2004 National Industry-Specific Occupational Employment and Wage Estimates

List of Occupations in SOC Code Number Order

List of Occupations in Alphabetical Order

Download November 2004 Occupational Employment and Wage Estimates in Zipped Excel files

Technical notes

Last Modified Date: November 9, 2005

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