Cedar Lake, St. Croix County- Critical Habitat Designation
| 2002 |
Chain O' Lakes, Waupaca County - Critical Habitat Designation
| 2009 |
Church Pine Lake, Polk County- Critical Habitat Designation
| 2006 |
Clark Lake, Lost Lake and Logan Creek - Door County - Critical Habitat Designation
| 2006 |
Clear Lake, Sawyer County- Critical Habitat Designation
| 2003 |
Como Lake, Walworth County- Critical Habitat Designation
| 2006 |
Cranberry Lake, Bayfield County - Critical Habitat Designation
| 2007 |
Crooked Lake - Adams County - Critical Habitat Designation
| 2006 |
Crystal Lake, Sheboygan County- Critical Habitat Designation
| 2006 |