Standard Drainage Area Classification (SDAC) 2003
- 02 - St. Lawrence
- 02G - Northern Lake Erie
- 02GA - Upper Grand
- 02GB - Lower Grand
- 02GC - Big, Ontario
- 02GD - Upper Thames
- 02GE - Lower Thames
- 02GF - Rondeau
- 02GG - Sydenham
- 02GH - Cedar
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