Montana's lakes, rivers and streams are some of the cleanest and most beautiful in the world. Keeping harmful aquatic plants and animals out of our waters helps preserve incredible fishing, swimming and boating for everyone.
Why This Matters
Our lakes and rivers support world-class trout fishing and native species found nowhere else.
Clean water means safe drinking water and healthier ecosystems.
Water recreation brings millions of dollars to Montana communities every year.
How Invasive Species Spread
They hitchhike on boats, trailers and fishing gear.
Tiny mussels, plant fragments and fish eggs stick to equipment.
Even a drop of water can contain thousands of microscopic invaders.
The Damage They Cause
Zebra and quagga mussels clog water pipes, costing millions to fix.
Invasive plants choke waterways, making boating, swimming and fishing impossible.
Non-native fish outcompete native trout and other species.
Clean, Drain, Dry—Every Time
Clean: Remove all visible plant material, mussels, mud and debris from boats, vehicles and gear.
Drain: Empty all water from boats, motors, coolers and any compartments that hold water.
Dry: Let everything dry completely before visiting new waters.
5 Ways to Be a Water Steward
Clean all equipment between every water body, even small streams.
Use hot water (140°F) or high-pressure washing when available.
Let boats and gear dry completely between trips.
Never transport live fish or water between different water bodies.
Report suspected invasive species to Montana Fish, Wildlife and Parks.
