How much does a Water and Wastewater Treatment Plant and System Operators actually take home in Hawaii?
Progressive (up to 11.0%) — 24.2% effective total tax rateData: BLS OEWS 2024 + IRS/State Tax Brackets 2024 • Updated 2026-04-06
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Detailed line-by-line tax calculation for a Water and Wastewater Treatment Plant and System Operators earning $64,920 in Hawaii (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $64,920 | — |
| Federal Income Tax | -$6,123 | 9.4% |
| Hawaii State Income Tax | -$4,609 | 7.1% |
| Social Security (OASDI) | -$4,025 | 6.2% |
| Medicare | -$941 | 1.5% |
| Total Taxes | -$15,699 | 24.2% |
| Take-Home Pay | $49,220 | 75.8% |
Take-home pay varies significantly across experience levels. Here is the after-tax breakdown for each salary percentile of Water and Wastewater Treatment Plant and System Operators in Hawaii.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $46,800 | -$10,331 | $36,469 | 22.1% |
| 25th Percentile (P25) | $55,390 | -$12,723 | $42,666 | 23.0% |
| Median (P50) | $64,920 | -$15,699 | $49,220 | 24.2% |
| 75th Percentile (P75) | $69,110 | -$17,287 | $51,822 | 25.0% |
| 90th Percentile (P90) | $71,840 | -$18,321 | $53,518 | 25.5% |
After federal income tax ($6,123), state tax ($4,609), and FICA ($4,966), a Water and Wastewater Treatment Plant and System Operators in Hawaii takes home $49,220 per year — or $4,101 per month. The effective tax rate of 24.2% is relatively low compared to the national range.
Where does a Water and Wastewater Treatment Plant and System Operators keep the most of their paycheck? Top 10 states ranked by after-tax take-home pay.
Hawaii ranks #11 out of 50 states for Water and Wastewater Treatment Plant and System Operators after-tax take-home pay.
A Water and Wastewater Treatment Plant and System Operators in Hawaii earning a median salary of $64,920 will take home approximately $49,220 per year after federal income tax ($6,123), state income tax ($4,609), and FICA ($4,966). That is $4,101 per month or $1,893 per bi-weekly paycheck.
The effective total tax rate for a Water and Wastewater Treatment Plant and System Operators in Hawaii is 24.2%, broken down as: federal income tax 9.4%, Hawaii state tax 7.1%, and FICA (Social Security + Medicare) 7.6%. This assumes a single filer with the standard deduction for 2024.
Hawaii has a progressive (up to 11.0%). On a Water and Wastewater Treatment Plant and System Operators's median salary of $64,920, the state income tax amounts to $4,609 per year, which is an effective state rate of 7.1%.
After all taxes, a Water and Wastewater Treatment Plant and System Operators in Hawaii takes home approximately $4,101 per month, or about $23.66 per hour (based on a standard 2,080-hour work year). These figures assume a single filer, standard deduction, and no additional pre-tax deductions.
We start with the 2024 BLS median salary of $64,920 for Water and Wastewater Treatment Plant and System Operators in Hawaii, then subtract: federal income tax using 2024 IRS brackets ($14,600 standard deduction), Hawaii state income tax (progressive (up to 11.0%)), Social Security (6.2% up to $168,600), and Medicare (1.45%). The result — $49,220/yr — does not include local taxes, pre-tax deductions (401k, HSA), or tax credits.
This estimate assumes a single filer using the 2024 standard deduction ($14,600), with W-2 employment income only. It does not account for: itemized deductions, tax credits (e.g. earned income credit, child tax credit), local/city taxes, pre-tax contributions (401k, HSA, FSA), self-employment tax, or additional income sources. Actual take-home pay may differ. Consult a tax professional for personalized advice.
Our Methodology · Data Sources · Salary: BLS OEWS · Tax: IRS + State DOR