Salaries › Water Treatment Operator › Hawaii
Water Treatment Operator Salary in Hawaii (2026)
$31.52 per hour · take-home ≈ $51,318/year ($4,277/month) for a single filer
Hawaii ranks 11th of 50 states for Water Treatment Operator pay, with a median about 9% above the national average. Of the 610 Water Treatment Operator jobs BLS counts in Hawaii, the typical worker earns $65,560 a year — though pay ranges from $46,900 for newcomers to $82,680 at the top.
Water Treatment Operator pay range in Hawaii
| Percentile | Annual wage | Meaning |
| 10th percentile (entry) | $46,900 | Lowest-paid 10% earn less than this |
| 25th percentile | $55,470 | A quarter earn less |
| Median (50th) | $65,560 | Half earn more, half earn less |
| 75th percentile | $78,320 | Top quarter starts here |
| 90th percentile (top) | $82,680 | Highest-paid 10% earn more than this |
BLS reports 610 Water Treatment Operator jobs in Hawaii (occupation code 51-8031, “Water and Wastewater Treatment Plant and System Operators”).
Gross vs. take-home in Hawaii
A median Water Treatment Operator salary of $65,560 doesn’t all reach your bank account. After federal income tax, Social Security, and Medicare, plus Hawaii state income tax, a single filer keeps about $51,318 — an effective tax rate of 21.7%.
| Gross (median) | $65,560 |
| Federal income tax | −$5,687 |
| Social Security + Medicare | −$5,015 |
| Hawaii state income tax | −$3,539 |
| Take-home (annual) | $51,318 |
| Take-home (monthly) | $4,277 |
Want your exact numbers — married, 401(k), different salary? Use the free Hawaii paycheck calculator on PaycheckTally.
Frequently asked questions
- How much does a Water Treatment Operator make in Hawaii?
- The median Water Treatment Operator salary in Hawaii is $65,560 per year ($31.52 per hour) according to the latest BLS data. The middle 50% earn between $55,470 and $78,320.
- What is the take-home pay for a Water Treatment Operator in Hawaii?
- On the median salary of $65,560, a single filer in Hawaii takes home about $51,318 per year ($4,277 per month) after federal tax, FICA, and state income tax — an effective tax rate of 21.7%.
- How many Water Treatment Operator jobs are there in Hawaii?
- BLS counts 610 Water Treatment Operator jobs in Hawaii in the latest survey (May 2025).
Top-paying states for Water Treatment Operators
Other salaries in Hawaii
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 Hawaii 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 Hawaii.