Environmental Science at Western
Not directly. At Western University you apply to Science (ES), then choose environmental science at the end of first year, during Intent to Register in March.
The program you actually apply to
Science
80–87%OUAC ESCo-op availableSupplementary application
Prerequisites
- English, ENG4U
- Calculus and Vectors MCV4U
- Two of:
- Advanced Functions, MHF4U
- Biology, SBI4U
- Math of Data Management, MDM4U
When you choose environmental science
At the end of first year, during Intent to Register in March.
What to watch for
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.
The same application also gets you to
Science is the entry point for 7 other majors at Western. You are not choosing between these at application time.
Environmental Science at the other campuses
Compare the entry programs side by side →- AlgomaDirect entry65%
- Brockvia Sciences (BI)73–77%
- Carletonvia Science - Honours (CT)78%
- Guelphvia Bachelor of Science in Environmental Sciences (BS Env) (GEA)75–80%
- Lakeheadvia Environmental Management (AO)70%
- LaurentianDirect entry70%
- Laurier (Waterloo)Direct entry73–77%
- McMastervia Environmental and Earth Sciences Gateway83–87%
- Nipissingvia Bachelor of Science (PS)70%
- Ontario Techvia Environmental Biology (DSL)70–73%
- Queen'svia Science – Earth and Environmental Science (QSE)80–87%
- TMUDirect entry70–75%
- TrentDirect entry75%
- U of T (Mississauga)via Chemical & Physical Sciences73–80%
- U of T (Scarborough)via Physical & Environmental Sciences (OUAC TSP)73–80%
- U of T (St. George)via Life Sciences (including Psychology)83–90%
- WaterlooDirect entry80–83%
- WindsorDirect entry70%
- YorkDirect entry80–87%
Entry routes were researched against each university’s own program pages in 2026-08-16. Western’s page. Faculties restructure — confirm before you apply.