Last updated: 2025 BLS data · Page refreshed:
How much does a Water and Wastewater Treatment Plant and System Operators actually take home in Idaho?
5.8% flat rate — 21.6% effective total tax rateData: BLS OEWS 2025 + IRS/State Tax Brackets 2024 • Updated 2026-05-19
Detailed line-by-line tax calculation for a Water and Wastewater Treatment Plant and System Operators earning $52,210 in Idaho (single filer, standard deduction).
| Tax Component | Annual Amount | Effective Rate |
|---|---|---|
| Gross Salary (Median) | $52,210 | — |
| Federal Income Tax | -$4,281 | 8.2% |
| Idaho State Income Tax | -$3,028 | 5.8% |
| Social Security (OASDI) | -$3,237 | 6.2% |
| Medicare | -$757 | 1.5% |
| Total Taxes | -$11,303 | 21.6% |
| Take-Home Pay | $40,906 | 78.4% |
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 Idaho.
| Percentile | Gross Salary | Total Taxes | Take-Home Pay | Tax Rate |
|---|---|---|---|---|
| 10th Percentile (P10) | $40,820 | -$8,404 | $32,415 | 20.6% |
| 25th Percentile (P25) | $45,940 | -$9,707 | $36,232 | 21.1% |
| Median (P50) | $52,210 | -$11,303 | $40,906 | 21.6% |
| 75th Percentile (P75) | $61,600 | -$13,693 | $47,906 | 22.2% |
| 90th Percentile (P90) | $74,950 | -$18,410 | $56,539 | 24.6% |
After federal income tax ($4,281), state tax ($3,028), and FICA ($3,994), a Water and Wastewater Treatment Plant and System Operators in Idaho takes home $40,906 per year — or $3,408 per month. The effective tax rate of 21.6% is relatively low compared to the national range.
With an effective total rate of 21.6%, a Water and Wastewater Treatment Plant and System Operators in Idaho keeps $40,907 of $52,210 gross — roughly typical for U.S. middle-income earners once federal, FICA and state taxes are combined.
Idaho applies a flat state income tax — every dollar of wage income is taxed at the same rate. For this Water and Wastewater Treatment Plant and System Operators salary that contributes $3,028 to the 5.8% effective state-tax burden.
Federal tax on this Water and Wastewater Treatment Plant and System Operators salary is $4,281 (38%), but combined state ($3,028, 27%) + FICA ($3,994, 35%) make up the other 62% of the bill.
Moving this same Water and Wastewater Treatment Plant and System Operators salary to a zero-state-tax state would yield around $43,935 net — a gain of $3,028 (7.4%) per year versus Idaho.
Idaho sits near the bottom (#40 of 50) for Water and Wastewater Treatment Plant and System Operators after-tax earnings. Relocation, negotiation, or credential stacking typically show the clearest ROI in bottom-quartile states.
Translated into paycheck cadences, $40,907 net/year works out to $3,409/month or $1,573/bi-weekly for this Water and Wastewater Treatment Plant and System Operators in Idaho — the numbers that actually hit a checking account after every deduction.
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.
Idaho ranks #40 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 Idaho earning a median salary of $52,210 will take home approximately $40,906 per year after federal income tax ($4,281), state income tax ($3,028), and FICA ($3,994). That is $3,408 per month or $1,573 per bi-weekly paycheck.
The effective total tax rate for a Water and Wastewater Treatment Plant and System Operators in Idaho is 21.6%, broken down as: federal income tax 8.2%, Idaho state tax 5.8%, and FICA (Social Security + Medicare) 7.7%. This assumes a single filer with the standard deduction for 2024.
Idaho has a 5.8% flat rate. On a Water and Wastewater Treatment Plant and System Operators's median salary of $52,210, the state income tax amounts to $3,028 per year, which is an effective state rate of 5.8%.
After all taxes, a Water and Wastewater Treatment Plant and System Operators in Idaho takes home approximately $3,408 per month, or about $19.67 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 2025 BLS median salary of $52,210 for Water and Wastewater Treatment Plant and System Operators in Idaho, then subtract: federal income tax using 2024 IRS brackets ($14,600 standard deduction), Idaho state income tax (5.8% flat rate), Social Security (6.2% up to $168,600), and Medicare (1.45%). The result — $40,906/yr — does not include local taxes, pre-tax deductions (401k, HSA), or tax credits.
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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