Studying Environmental Science in Ontario

Western University

Apply to Science (ES)

You choose environmental science at the end of first year, during Intent to Register in March.

There is no first-year program called 'Environmental Science' — the Honours Specialization, Specialization, Major and Minor in Environmental Science are modules in the Department of Earth Sciences, Faculty of Science (ES), alongside Environmental Geoscience. Two different faculties serve this field and they are separate OUAC choices: if you are more interested in the human/policy side (Environment and Health, Climate Change and Society, Urban Development), that is Geography and Environment in Social Science (EO). Decide before you list codes, or list both.

Queen's University

Apply to Science – Earth and Environmental Science (QSE)

You choose environmental science during Plan Selection in May at the end of first year.

Environmental Science (BSc) and Environmental Studies (BA) are two different plans — the BA route is entered through Arts (QA), NOT this science pathway. Both confirmed in the School of Environmental Studies listing, alongside Environmental Biology, Environmental Chemistry, Environmental Geology, Environmental Life Sciences and Environmental Toxicology, all selected after first year. CODE CAVEAT: Queen's requirements table still prints Science (QS); confirm QSE on OUAC.

McMaster University

Apply to Environmental and Earth Sciences Gateway

You choose environmental science at the end of first year.

Level 2 options include Honours Environmental Sciences and Honours Biodiversity & Environmental Sciences. If you want the policy/society side rather than lab science, that is Environment & Society through Social Sciences I — a BA, not a BSc, and a completely different OUAC choice.

University of Toronto — St. George

Apply to Life Sciences (including Psychology)

You choose environmental science at the end of first year.

Environmental Science is an HBSc under Life Sciences requiring SBI4U, SCH4U and MCV4U. U of T confirms Environmental Studies and Environmental Geography are different programs, HBA under Social Sciences (tax) with only ENG4U required — mixing these up is the most common environment-stream mistake.

University of Toronto — Mississauga

Apply to Chemical & Physical Sciences

You choose environmental science after first year (4.0 credits).

The HBSc versions (Environmental Science, Environmental Geosciences) are under Chemical & Physical Sciences, but the HBA versions — Environmental Management, Environmental Law and Policy, Sustainability — are under Social Sciences (TMS). Pick the code that matches the degree you want.

University of Toronto — Scarborough

Apply to Physical & Environmental Sciences (OUAC TSP)

You choose environmental science end of first year, on ACORN.

Entry point is TSP (TXH for the Health Sciences stream), missing from this dataset. Requires Grade 12 Biology, Advanced Functions and Calculus & Vectors, mid 70s. Careful: Environmental Studies is a different program — an HBA that applies under Social Sciences & Humanities (TUD) with English as the only prerequisite.