Delaware ranks 20th of 50 states and D.C. for water and wastewater treatment plant and system operators pay, trailing top-paying California ($82,100) by $22,140 — a 37% gap.
The 10th-to-90th percentile range runs from $43,800 to $79,320 — a $35,520 spread, 26% tighter than the national $48,290 range.
Water and Wastewater Treatment Plant and System Operators are less concentrated in Delaware than the U.S. average — a location quotient of 0.65 means the occupation's share of local jobs is 1.54× below the national share.
Salary Range: 10th to 90th Percentile
Full Percentile Breakdown
| Percentile | Annual Wage | Hourly Wage |
|---|---|---|
| 10th percentile (entry-level) | $43,800 | $21.06 |
| 25th percentile | $47,780 | $22.97 |
| 50th percentile (median) | $59,960 | $28.83 |
| 75th percentile | $66,010 | $31.74 |
| 90th percentile (top earners) | $79,320 | $38.14 |
| Mean (average) | $59,860 | $28.78 |
How Delaware Compares
| State | Median Annual | vs. Delaware |
|---|---|---|
| Delaware (current) | $59,960 | n/a |
| California | $82,100 | +37% |
| Nevada | $79,140 | +32% |
| Washington | $78,810 | +31% |
| Alaska | $76,910 | +28% |
| New Jersey | $75,200 | +25% |
| Connecticut | $74,450 | +24% |
| Minnesota | $70,470 | +18% |
| Colorado | $68,220 | +14% |
Showing top-paying states with available data. View all states →
Related Occupations in Delaware
| Occupation | Median Annual | Employment |
|---|---|---|
| Heating, Air Conditioning, and Refrigeration Mechanics and Installers | $59,940 | 1,790 |
| Paralegals and Legal Assistants | $60,000 | 2,220 |
| Insurance Sales Agents | $59,910 | 1,140 |
| Industrial Truck and Tractor Operators | $60,030 | 6,980 |
| Machinists | $60,320 | 390 |
| Roofers | $59,280 | 230 |
Frequently Asked Questions
What is the average Water and Wastewater Treatment Plant and System Operators salary in Delaware?
The mean water and wastewater treatment plant and system operators salary in Delaware is $59,860 per year. The median (middle) salary is $59,960 per year.
What is the starting salary for a Water and Wastewater Treatment Plant and System Operators in Delaware?
Entry-level water and wastewater treatment plant and system operatorss (10th percentile) in Delaware typically earn around $43,800 per year. Workers at the 25th percentile earn approximately $47,780 per year.
What is the highest Water and Wastewater Treatment Plant and System Operators salary in Delaware?
Top earners (90th percentile) in this occupation in Delaware make approximately $79,320 per year. Those in the 75th percentile earn around $66,010 per year.
How does the Delaware Water and Wastewater Treatment Plant and System Operators salary compare to the national average?
The median water and wastewater treatment plant and system operators salary in Delaware is $59,960, which is +3% above national average of $58,260.