Aquatic Invasive Species
Connecticut AIS
Sticker Requirements 2026
Aquatic invasive species sticker and watercraft inspection requirements for Connecticut boaters. Connecticut does not require a paid AIS sticker. Connecticut waters are affected by several invasive species including variable milfoil, hydrilla, and water chestnut. DEEP operates mandatory boat inspection stations at certain high-risk boat launches during peak season, and it is illegal to transport aquatic plants from any water body.
Inspection Stations Available
2026 AIS Requirements Quick Facts
Verified 2026
Resident Sticker
N/A
No sticker required
Nonresident Sticker
N/A
Check agency for current fees
Inspection?
Not Required
Stations available at ramps
Noncompliance Fine
Up to $100 per violation for transporting aquatic plants
For violating AIS requirements
Step-by-Step
How to Comply with AIS Requirements in Connecticut
Follow these steps to stay compliant with Connecticut's aquatic invasive species regulations:
1
Check Sticker & Inspection Requirements
Connecticut does not currently require a mandatory AIS sticker or inspection program. However, all boaters are strongly encouraged to follow Clean, Drain, Dry practices.
2
Purchase Your AIS Sticker (If Required)
No paid AIS sticker purchase is required in Connecticut at this time. Check back annually as state requirements can change.
3
Practice Clean, Drain, Dry
Before leaving any boat launch — and before launching on a new water body — clean all visible aquatic plants and debris from your boat, trailer, and equipment. Drain all water from bilges, livewells, bait buckets, motor, and other water-holding compartments. Allow the boat to dry for at least 5 days before launching on a different water body, or use a high-pressure, hot-water wash.
4
Cooperate with Inspection Stations
Connecticut operates watercraft inspection stations at launch sites and on roadways. When you encounter an inspection station, stop and allow the inspector to check your boat. Inspections are typically free and quick — usually under 10 minutes. Refusing an inspection can result in a fine.
Noncompliance fine: Up to $100 per violation for transporting aquatic plants.
Requirements
Connecticut AIS Compliance Requirements
Connecticut law prohibits transporting aquatic plants from water bodies. Boaters must remove and dispose of all aquatic vegetation before leaving any access area.
Source: Connecticut Department of Energy and Environmental Protection (portal.ct.gov).
Requirements verified 2026. Always confirm current AIS requirements directly with the agency before launching.