Wastewater Treatment Operator Salary in Ontario (2025)
36 disclosed records, 2020–2025 · mostly Municipalities & Services (100%)
At a Glance
2025
Disclosed
22
2025 Sunshine List
Median Salary
$110,568
-9.6% vs provincial median
Typical Range
$106,211–$114,548
25th–75th percentile
Top Salary
$146,615
Who is the highest-paid Wastewater Treatment Operator in Ontario?
The highest-paid Wastewater Treatment Operator on the 2025 Sunshine List was Murray Mcdonnell at City Of Barrie, with a salary of $146,615; the median among the 22 listed under this title was $110,568.
Take-Home Pay
(After Tax) · 2025 estimate
A Wastewater Treatment Operator paid the 2025 median of $110,568 would take home roughly $81,175 after income tax, CPP and EI — about $6,765 a month, an effective rate of about 21.6%. 22 people were listed under this title in 2025. Half of those listed earned between $106,211 and $114,548. That is about 10% below the 2025 median across the whole list, $122,262. After pension contributions (probably OMERS in this sector), take-home is usually a further 7–10% lower.
- Estimated net pay
- ~$81,175
- Effective income-tax rate (excl. CPP/EI)
- ~21.6%
- CPP + EI contributions
- ~$5,507
- Per month, after tax
- ~$6,765
Where does $110,568 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 |
|---|---|---|---|---|
| Regional Municipality of Halton | 9 | $110,804 | $127,112 | Pay here → |
| City of Barrie | 8 | $118,167 | $146,615 | Pay here → |
Highest Paid
2025
| # | Name | Employer | Title as filed | Salary | Total |
|---|---|---|---|---|---|
| 1 | Murray Mcdonnell | City Of Barrie | Wastewater Treatment Operator | $146,615 | $149,155 |
| 2 | Lihui Ma | City Of Barrie | Wastewater Treatment Operator | $137,368 | $138,257 |
| 3 | Jack Wu | Regional Municipality Of Halton | Wastewater Treatment Operator | $127,112 | $127,550 |
| 4 | Brandon Rogers | City Of Barrie | Wastewater Treatment Operator | $123,453 | $125,879 |
| 5 | Cameron Chaikoff | City Of Barrie | Wastewater Treatment Operator | $122,814 | $123,763 |
| 6 | Mark Zolkowski | City Of St. Thomas | Wastewater Treatment Operator | $114,548 | $115,160 |
| 7 | Harry Osborne-Haw | Regional Municipality Of Halton | Wastewater Treatment Operator | $114,466 | $114,890 |
| 8 | Adam Wardzala | Regional Municipality Of Halton | Wastewater Treatment Operator | $114,106 | $114,545 |
| 9 | Amanda Martin | City Of Barrie | Wastewater Treatment Operator | $113,521 | $113,913 |
| 10 | Steve Newstead | Regional Municipality Of Halton | Wastewater Treatment Operator | $110,977 | $111,416 |
By Year
Related Positions
- Constable5,795
- Firefighter5,399
- Police Constable4,778
- Operator3,992
- Primary Care Paramedic2,883
- Sergeant1,600
- Captain1,385
- Plainclothes Police Constable1,286
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.