Questions or concerns about water levels or flooding should be directed to your local municipality, or the Lake Simcoe Conservation Authority for those concerned about Lake Simcoe. Local municipalities are the lead communicator to the public regarding flood conditions in areas where there is no Conservation Authority (as is the case on the Severn and Black Rivers). They receive their information from the Ontario Ministry of Natural Resources, which, in turn, gets its information from the Trent-Severn Waterway-Parks Canada.
South Side of Severn:Township of Severn –
www.townshipofsevern.com; (705) 325-2315
Township of Ramara –
www.township.ramara.on.ca; (705) 484-5374
North Side of Severn:Township of Muskoka Lakes –
www.township.muskokalakes.on.ca; (705) 765-3156
Township of Georgian Bay –
www.township.georgianbay.on.ca; (705) 538-2702
Town of Gravenhurst –
www.gravenhurst.ca; (705) 687-3412
Lake Simcoe Conservation Authority -
http://www.lsrca.on.ca/floodbulletin/bulletin.html; (905) 895-1281
Ontario Ministry of Natural Resources Flooding Information -
http://www.mnr.gov.on.ca/en/Business/EmergencyManagement/2ColumnSubPage/239496.html 
