Prevent the Spread of Invasive Species
Prevent the Spread of Invasive Species
BOAT, PADDLE OR FISH?

It’s good stewardship to prevent the spread of aquatic invasive species, but did you know it’s also the law?
The Invasive Species Rule, or “NR 40,” classifies and regulates aquatic invasive threats. In Wisconsin, residents and visitors are required to take preventive measures to help stop the spread of invasives. Always follow these simple steps:
- INSPECT your equipment for invasives
- REMOVE all attached debris
- DRAIN water from boats & equipment
- NEVER MOVE live fish away from a water body
CLEAN BOATS, CLEAN WATERS

One important way you can help prevent the spread of aquatic invasive species is to clean your watercraft before and after leaving rivers and lakes.
River Alliance is proud to participate in the Clean Boats Clean Waters (CBCW) program; conducting watercraft inspections at high-traffic boat landings and access points in western Wisconsin, educating boaters and anglers on aquatic invasive species and the steps for prevention.
CLEAN ANGLING, BETTER FISHING

In addition to our plentiful rivers and lakes, Wisconsin also has over 2,900 trout streams. Anglers play a key role in protecting our waterways from the threat of aquatic invasive species. A current threat is the highly aggressive New Zealand mudsnail, which has been found in multiple streams in Wisconsin. They are known to reach high abundances, outcompete native stream insects that serve as food for fish, and can alter the natural functions of streams.
- Use this flowchart to decide what measures you should take to prevent the spread of invasive species.
- Frequently Asked Questions about Clean Angling
- Learn about our Wader Wash Station initiative created to address the spread of New Zealand mudsnails.
THANKS TO OUR PARTNERS!

