● OPSCI.ca Ontario · 2010–2025

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Wastewater Supervisor

Municipalities and Services · FY2025

37 disclosed employees* in 2025 16 yrs on file (2010–2025) 16 employers (min. 3 disclosed) 1 newly promoted in 2025 16.2% estimated female
Median salary
$119,822
P90 salary
$151,959
Raise, 2025
+7.6%

Trend 2010–2025

YearDisclosed Emp.Median salaryP90 salaryRaiseNewly PromotedGender
2025 37 $119,822 $151,959 +7.6% 1 16.2% F
2024 56 $122,575 $153,544 +2.4% 0 8.9% F
2023 55 $119,942 $155,125 +6.6% 5 10.9% F
2022 39 $111,817 $127,106 +4.2% 1 7.7% F
2021 32 $112,521 $126,660 +2.1% 1 6.2% F
2020 31 $114,155 $139,742 +5.5% 1 3.2% F
2019 40 $109,515 $129,062 +2.0% 0 10.0% F
2018 38 $108,514 $129,494 +2.0% 1 5.3% F
2017 34 $108,612 $139,608 +8.6% 0 11.8% F
2016 27 $108,849 $122,254 -0.3% 0 11.1% F
2015 18 $113,182 $127,196 -2.6% 0 —
2014 15 $119,195 $137,599 +8.9% 2 —
2013 11 $108,927 $117,202 +5.2% 0 —
2012 5 $110,577 $111,123 +4.3% 0 —
2011 11 $105,803 $123,302 +3.8% 0 —
2010 2 $108,927 $114,200 n/a 0 —

Raise is the average change for people who held this exact role, in this sector, in both years — not a same-role year-over-year average, which would be skewed by people newly crossing the disclosure threshold or leaving. Promotions is a heuristic (title changed and raise ≥10% in the same year), not verified. Gender is a name-based estimate, shown only for years with 20 or more disclosed employees.

By employer FY2025 · ranked by disclosed employees

#EmployerDisclosed Emp.Median salaryP90 salaryMax salaryNew entrantsRaise
1 City of London overall 7 $108,738 $130,751 $155,921 3 +4.8%
2 City of Windsor overall 7 $113,495 $116,191 $116,489 1 +1.8%
3 Regional Municipality of Niagara overall 6 $138,133 $147,688 $148,887 0 +14.4%
4 City of Greater Sudbury overall 3 $121,350 $126,805 $128,169 1 n/a
5 Town of Collingwood overall 2 $135,581 $157,474 $162,947 0 n/a
6 Town of Newmarket overall 2 $118,218 $120,973 $121,662 0 n/a
7 Regional Municipality of Halton overall 1 $167,558 $167,558 $167,558 0 n/a
8 City of Kawartha Lakes overall 1 $157,658 $157,658 $157,658 0 n/a
9 Town of East Gwillimbury overall 1 $149,318 $149,318 $149,318 0 n/a
10 Town of Orangeville overall 1 $141,353 $141,353 $141,353 0 n/a
11 City of Vaughan overall 1 $141,069 $141,069 $141,069 0 n/a
12 City of Ottawa overall 1 $129,068 $129,068 $129,068 0 n/a
13 City of St Thomas overall 1 $121,169 $121,169 $121,169 0 n/a
14 City of Owen Sound overall 1 $119,822 $119,822 $119,822 0 n/a
15 Township of Asphodelnorwood overall 1 $107,234 $107,234 $107,234 1 n/a
16 Municipality of Trent Hills overall 1 $103,916 $103,916 $103,916 1 n/a

"New entrants" is headcount in their first year in this exact role at this employer — not a hire count; many already worked here.

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