Monitoring
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Antidegradation
The antidegradation rule is implemented in Chapter NR 207 of the Wisconsin Administrative Code. The purpose of the rule is to address new or increased discharges to surface waters (river, lakes, drainage ways, wetlands, etc.). The way in which these…
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Surface Water Integrated Monitoring System (SWIMS) Database
Subscribe for updates about the SWIMS system The Surface Water Integrated Monitoring System (SWIMS) is a DNR system that holds chemistry (water, sediment, fish tissue) data, physical data, biological (macroinvertebrate, aquatic invasives) data…
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Sea lamprey and control efforts in Wisconsin
The sea lamprey, Petromyzon marinus, which is a descendant of the earliest known type of vertebrates, is a parasitic species of eel-like fish native to the Atlantic Ocean and the East Coast of North America. Because of their eel-like shape, lamprey…
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Fishing calendar for Lake Superior
This fact sheet on when is the best time to fish in Wisconsin for what species of fish and where is the best place to find them. Also, the typical fishing method you can use should help increase your chances of catching the fish.
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Lake Superior fish identification tips
Identifying fish can seem easy at times but many times can be a challenge. It is not any different for Lake Superior anglers who can be confused when trying to determine whether the fish they have caught is a lake trout, splake or a "coaster" brook…
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Lake Superior coaster brook trout
Is the coaster brook trout a unique strain long lost from Wisconsin's Lake Superior shoreline...
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Fishing the Brule River
A gem of a fishing opportunity awaitsRecreational fishing is arguably th
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Brule River fishery facts
The Bois Brule River is one of Wisconsin's best-known trout streams. At the time of European settlement (1850s) the Brule was already regarded as one of the finest brook trout fishing streams in the state. Wisconsin's settlement push reached the…
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Lake Superior Outdoor Fishing Report – Jan. 28, 2026
With the recent stretch of below-zero temperatures, anglers report that ice formation has expanded tremendously on Lake Superior. Ice is now present along the entire shoreline from Ashland up through Red Cliff and along the South Shore and out into…