Salaries › Water Treatment Operator › Delaware
Water Treatment Operator Salary in Delaware (2026)
$31.22 per hour · take-home ≈ $51,304/year ($4,275/month) for a single filer
Delaware ranks 12th of 50 states for Water Treatment Operator pay, with a median about 8% above the national average. Of the 340 Water Treatment Operator jobs BLS counts in Delaware, the typical worker earns $64,940 a year — though pay ranges from $48,160 for newcomers to $84,360 at the top.
Water Treatment Operator pay range in Delaware
| Percentile | Annual wage | Meaning |
| 10th percentile (entry) | $48,160 | Lowest-paid 10% earn less than this |
| 25th percentile | $54,960 | A quarter earn less |
| Median (50th) | $64,940 | Half earn more, half earn less |
| 75th percentile | $76,240 | Top quarter starts here |
| 90th percentile (top) | $84,360 | Highest-paid 10% earn more than this |
BLS reports 340 Water Treatment Operator jobs in Delaware (occupation code 51-8031, “Water and Wastewater Treatment Plant and System Operators”).
Gross vs. take-home in Delaware
A median Water Treatment Operator salary of $64,940 doesn’t all reach your bank account. After federal income tax, Social Security, and Medicare, plus Delaware state income tax, a single filer keeps about $51,304 — an effective tax rate of 21.0%.
| Gross (median) | $64,940 |
| Federal income tax | −$5,613 |
| Social Security + Medicare | −$4,968 |
| Delaware state income tax | −$3,055 |
| Take-home (annual) | $51,304 |
| Take-home (monthly) | $4,275 |
Want your exact numbers — married, 401(k), different salary? Use the free Delaware paycheck calculator on PaycheckTally.
Frequently asked questions
- How much does a Water Treatment Operator make in Delaware?
- The median Water Treatment Operator salary in Delaware is $64,940 per year ($31.22 per hour) according to the latest BLS data. The middle 50% earn between $54,960 and $76,240.
- What is the take-home pay for a Water Treatment Operator in Delaware?
- On the median salary of $64,940, a single filer in Delaware takes home about $51,304 per year ($4,275 per month) after federal tax, FICA, and state income tax — an effective tax rate of 21.0%.
- How many Water Treatment Operator jobs are there in Delaware?
- BLS counts 340 Water Treatment Operator jobs in Delaware in the latest survey (May 2025).
Top-paying states for Water Treatment Operators
Other salaries in Delaware
Sources and methodology
Wage and employment figures: BLS OEWS May 2025 (state file, released April 2026) — the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics survey, the most authoritative public salary dataset. Take-home estimate: 2026 federal brackets, FICA, and verified Delaware state tax rules (single filer, standard deduction, no credits or local taxes). Estimates only — not financial advice.
- BLS OEWS — official occupational wage data.
- PaycheckTally — interactive 2026 take-home calculator for Delaware.