If your first language is not English and you have not studied in an English language school system for the most recent 4 years immediately before the month you begin your studies at Waterloo, you must provide one following tests with minium scores as listed for admission to the Faculty of Science:
Test of English as a Foreign Language (TOEFL): Paper-based Test 580, TWE 4.5, TSE 45 or
Computer-based Test 237, Essay rating 4.5, TSE 45 or
Internet-based Test 90, writing 25, speaking 25
The International English Language Testing System (IELTS): 7.0
The Michigan English Language Assessment Battery (MELAB): 85
Canadian Academic English Language Assessment (CAEL): 70 overall; 60 per band
These requirements are distinct from and additional to the requirement to present OAC English 1 (or equivalent) as an admission requirement.
Bilingual francophone Canadians educated in Canada are not required to meet these English test requirements.
More information on English language requirements and exemptions is available here.