Senior Wastewater Engineer Salary in Ontario (2025)
150 disclosed records, 2011–2025 · mostly Government of Ontario – Ministries (100%)
Last filed under this title in 2025. Fewer than 20 records in the latest Sunshine List, so this page is kept for history.
At a Glance
2025
Disclosed
13
2025 Sunshine List
Median Salary
$145,108
+18.7% vs provincial median
Typical Range
$133,657–$157,711
25th–75th percentile
Top Salary
$158,115
Who is the highest-paid Senior Wastewater Engineer in Ontario?
The highest-paid Senior Wastewater Engineer on the 2025 Sunshine List was Mohammed Nizamuddin at Environment, Conservation and Parks, with a salary of $158,115; the median among the 13 listed under this title was $145,108.
Take-Home Pay
(After Tax) · 2025 estimate
Federal and Ontario income tax on the 2025 Senior Wastewater Engineer median of $145,108 comes to about 26.5%, leaving roughly $101,100 a year — about $8,425 a month. 13 people were listed under this title in 2025. The middle half of Senior Wastewater Engineer salaries ran from $133,657 to $157,711. After pension contributions (probably PSPP or OPTrust in this sector), take-home is usually a further 7–10% lower.
- Estimated net pay
- ~$101,100
- Effective income-tax rate (excl. CPP/EI)
- ~26.5%
- CPP + EI contributions
- ~$5,507
- Per month, after tax
- ~$8,425
Where does $145,108 rank on the Sunshine List? →
Estimate only: 2025 federal and Ontario rates, basic personal amounts, Canada employment amount and CPP/EI credits; single, employment income only, salary treated as full-year income. Ignores pension contributions (OMERS, HOOPP, OTPP, OPTrust and similar plans lower actual take-home), union dues, RRSPs and benefits.
Median by Year
2005–2025
Median salary paid among disclosed records. 2023 is absent: job titles were not disclosed that year. Years with fewer than five people are omitted.
Where They Work
2025 · employers with 5+
| Employer | People | Median | Top | Detail |
|---|---|---|---|---|
| Environment, Conservation and Parks | 13 | $145,108 | $158,115 | Pay here → |
Highest Paid
2025
| # | Name | Employer | Title as filed | Salary | Total |
|---|---|---|---|---|---|
| 1 | Mohammed Nizamuddin | Environment, Conservation and Parks | Senior Wastewater Engineer | $158,115 | $158,280 |
| 2 | Yanhong Du | Environment, Conservation and Parks | Senior Wastewater Engineer | $157,711 | $157,861 |
| 3 | Yue He | Environment, Conservation and Parks | Senior Wastewater Engineer | $157,711 | $157,876 |
| 4 | Wayne Simpson | Environment, Conservation and Parks | Senior Wastewater Engineer | $157,711 | $157,861 |
| 5 | Katrina Chrzanowska | Environment, Conservation and Parks | Senior Wastewater Engineer | $157,703 | $157,854 |
| 6 | Khalid Hussain | Environment, Conservation and Parks | Senior Wastewater Engineer | $157,696 | $157,861 |
| 7 | Miten Shah | Environment, Conservation and Parks | Senior Wastewater Engineer | $145,108 | $145,248 |
| 8 | Li Feng Wei | Environment, Conservation and Parks | Senior Wastewater Engineer | $142,325 | $142,476 |
| 9 | Sumithra Naguleswaran | Environment, Conservation and Parks | Senior Wastewater Engineer | $136,010 | $136,239 |
| 10 | Michael Sander | Environment, Conservation and Parks | Senior Wastewater Engineer | $133,657 | $133,791 |
By Year
Related Positions
- General Duty Officer2,942
- Law Enforcement Officer2,864
- Team Leader1,492
- Investigator1,192
- Assistant Crown Attorney997
- Senior Policy Advisor933
- Supervisor874
- Counsel737
About these figures
Source: Ontario’s Public Sector Salary Disclosure (the “Sunshine List”), which names every public-sector employee paid $100,000 or more in a calendar year. Figures are disclosed salaries, not market compensation: anyone in this position earning under $100,000 does not appear, so medians here sit above the true median for the job.
Medians and percentiles use salary paid (benefits excluded), computed over records whose filed job title was normalized into this position. Titles are as each employer filed them; spellings, word order and bilingual forms are merged. Employers and years with fewer than five people show counts only. 2023: job titles were not disclosed, so that year has no position data.
Data through 2025, the most recent Sunshine List disclosed.