Lake Conditions - Dane County
http://www.danesheriff.com/ -- Dane County Sheriff Dept.
http://www.publichealthmdc.com/ -- Madison Department of Public Health
http://www.countyofdane.com/lwrd/parks -- Dane County Parks
(608) 284-6800 -- Dane County Sheriff's Office
(608) 284-6878 -- Marine and Trail Enforcement
(608) 266-4821 -- Department of Public Health (Beaches)
(608) 224-3730 -- Dane County Parks (Office)
(608) 242-4576 -- Dane County Parks (Info)
The Dane County Sheriff Department Lake Patrol can give people the "official word" on if it is safe to go out on the lake in icy conditions (They often refer callers to Bait Stores--many callers want ice fishing information and the bait store employees can help.)
The Madison Department of Public Health can tell people which beaches are safe for swimming.
Dane County Parks is responsible for weed spraying and cutting.