Nicola Mercer
Medical Officer of Health and Chief Executive Officer at Wellington-Dufferin-Guelph Health Unit. On Ontario’s disclosure list 18 years between 2008 and 2025.
Medical Officer of Health and Chief Executive Officer
Wellington-Dufferin-Guelph Health Unit
- Salary paid
- $356,340.93
- Taxable benefits
- $5,476.61
- Total disclosed
- $361,817.54
Change from 2024: +$5,562 (+1.6%)18years on
the list
Among 6 people with the title “Medical Officer of Health and Chief Executive Officer” in 2025
Paid more than 16% of them. Their median: $374,945.
Among 47 people at Wellington-Dufferin-Guelph Health Unit in 2025
1st highest paid. Their median: $115,769.
Paid more than 99% of everyone on the 2025 disclosure list, which only lists people paid $100,000 or more.
Salary by year
Show as a table
| Year | Salary | Median for the job |
|---|---|---|
| 2008 | $193,154 | |
| 2009 | $241,602 | |
| 2010 | $249,166 | $277,552 |
| 2011 | $288,515 | |
| 2012 | $284,432 | |
| 2013 | $298,616 | $289,251 |
| 2014 | $304,786 | $296,029 |
| 2015 | $318,205 | $308,042 |
| 2016 | $301,340 | $297,017 |
| 2017 | $301,340 | $314,356 |
| 2018 | $311,498 | |
| 2019 | $312,711 | $304,451 |
| 2020 | $307,892 | $357,436 |
| 2021 | $378,482 | |
| 2022 | $387,874 | $297,827 |
| 2023 | $320,544 | |
| 2024 | $350,779 | $341,130 |
| 2025 | $356,341 | $374,945 |
History
| Year | Employer and job | Salary | Benefits | Change |
|---|---|---|---|---|
| 2025 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health and Chief Executive Officer | $356,341 | $5,477 | +$5,562 (+1.6%) |
| 2024 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health and Chief Executive Officer | $350,779 | $5,484 | +$30,235 (+9.4%) |
| 2023 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health / Chief Executive Officer | $320,544 | $5,512 | −$67,331 (−17.4%) |
| 2022 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health / Chief Executive Officer | $387,874 | $5,608 | +$9,392 (+2.5%) |
| 2021 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health and Chief Executive Officer | $378,482 | $5,529 | +$70,590 (+22.9%) |
| 2020 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health and Chief Executive Officer | $307,892 | $656 | −$4,819 (−1.5%) |
| 2019 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health/Chief Executive Officer | $312,711 | $649 | +$1,212 (+0.4%) |
| 2018 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health/Chief Executive Officer/Medecin-hygieniste/Directrice generale | $311,498 | $5,409 | +$10,158 (+3.4%) |
| 2017 | Wellington-Dufferin-Guelph Health Unit / Bureau De Santé Wellington Dufferin GuelphMedical Officer of Health/Chief Executive Officer / Médecin-hygiéniste/Directrice générale · moved here | $301,340 | $5,429 | $0 (0.0%) |
| 2016 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health/Chief Executive Officer / Médecin-hygiéniste/Directrice générale | $301,340 | $5,379 | −$16,865 (−5.3%) |
| 2015 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health/Chief Executive Officer / Médecin-hygiéniste/Directrice générale | $318,205 | $655 | +$13,419 (+4.4%) |
| 2014 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health / Chief Executive Officer / Médecin-hygéniste / Directrice générale | $304,786 | $778 | +$6,170 (+2.1%) |
| 2013 | Wellington-Dufferin-Guelph Health Unit / Conseil de Santé de Wellington-Dufferin-GuelphMedical Officer of Health/Chief Executive Officer / Médecin-hygéniste / Directrice générale | $298,616 | $779 | +$14,183 (+5.0%) |
| 2012 | Wellington-Dufferin-Guelph Health Unit / Conseil de Santé de Wellington-Dufferin-GuelphMedical Officer of Health/ Chief Executive Officer /Médecin–hygéniste / Directrice générale | $284,432 | $737 | −$4,083 (−1.4%) |
| 2011 | Wellington-Dufferin-Guelph Health Unit / Conseil de Santé de Wellington-Dufferin-GuelphMedical Officer of Health/Chief Executive Officer/Médecin-hygéniste/Directrice générale · moved here | $288,515 | $921 | +$39,350 (+15.8%) |
| 2010 | Wellington-Dufferin-Guelph Health UnitMedical Officer of Health/Chief Executive Officer | $249,166 | $823 | +$7,564 (+3.1%) |
| 2009 | Wellington-Dufferin-Guelph Health UnitActing Medical Officer of Health/Chief Executive Officer | $241,602 | $406 | +$48,448 (+25.1%) |
| 2008 | Wellington-Dufferin-Guelph Health UnitActing Medical Officer of Health/Chief Executive Officer | $193,154 | $100 |
Compare
Questions and answers
Why is Nicola Mercer on the disclosure list?
Wellington-Dufferin-Guelph Health Unit paid Nicola Mercer $356,341 in 2025. Ontario’s public employers must disclose everyone they paid $100,000 or more in a calendar year, under the Public Sector Salary Disclosure Act, 1996.
What does “salary paid” include?
What the employer paid in the calendar year, so it can include overtime, retroactive pay, vacation payouts, severance or a partial year. Taxable benefits are listed separately. How the lists work
What do the comparisons mean?
Ranks and shares are among people on the same year’s list only: those with the same title, those at the same employer, or everyone listed. People paid under $100,000 are not on the list, so they are not counted.
How do I report a mistake or ask for a record to be removed?
Privacy and corrections explains both. Figures are shown exactly as Ontario published them; we fix matching mistakes and handle removal requests there.
Years at different employers were matched because the name appears once on each year’s list with the same job or sector. Salary paid can include overtime, retroactive pay and one-time payments. Figures are exactly as Ontario published them. How we match years · Report a mistake or ask for removal