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Scientific Information

Aquatic Invasive Species

Invasive aquatic species are introduced exotic flora and fauna that displace native plant and animal communities. Infestations result in habitat disruption, loss of property values, diminished water quality, reduced fishing and water recreation opportunities and significant expense for mitigating these environmental costs. This map shows known infested waterbodies in Maine. There are eleven invasive aquatic species identified in Maine law as illegal to import, sell, and transport. Thankfully, North Pond dies not have any of these plants, yet. Prevention is key!


Variable Leaf Milfoil


Yellow Floating Heart


Eurasian Milfoil


The key to protecting Maine waters

How does “Clean Drain Dry” Stop aquatic invasive species? Clean, Drain, Dry is a simple three step process that boaters can follow every time they move from one body of water to another. When boaters take action every time they leave the water, they can stop the spread of harmful aquatic invasive species!

CLEAN off  visible aquatic plants, animals, and mud from all equipment before leaving water access

DRAIN watercraft bilge, livewell, motor and other water containing devices before leaving water access.

DRY everything for at least five days OR wipe with a towel before reuse.

For ANGLERS, the additional step of DISPOSE is recommended:

DISPOSE of unwanted bait, worms, and fish parts in the trash. When keeping live bait, drain bait containers and replace with spring or dechlorinated tap water. Never dump live fish or other organisms from one water body into another.

Courtesy Boat Inspectors (CBI)

From Maine.Gov:

Maine’s Courtesy Boat Inspection (CBI) Program completed its 19th year in 2019.  The purpose of these voluntary inspections is to reduce the spread of invasive aquatic plants (IAP) by boats, trailers, and associated equipment to Maine waters.  Trained Courtesy Boat Inspectors discuss with boaters the risk posed by IAP, show boaters how to inspect and remove vegetation from boating and fishing equipment, and urge boaters to inspect before and after every launch. 

The Maine Department of Environmental Protection (DEP) contracted again with Lakes Environmental Association in Bridgton to train volunteers, organize inspections, and manage grant pass through funds to lake groups in 2020.  

SELF INSPECTION is also strongly encouraged! If there is not a CBI at the time of launch or loading, please take the time to look over your motor, boat, trailer, and anything else that could potentially hold a plant fragment. Remember, CLEAN, DRAIN, DRY. 

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