During the 2014 legislative session, a county aid program was created to help prevent the spread of aquatic invasive species (AIS). Based on the number of trailered watercraft launches and trailer parking spaces, the funding Washington County receives varies, ranging from $139,581 in 2015 to $132,169 in 2017.
The Minnesota Department of Revenue has certified $135,414 for AIS prevention aid for Washington County in 2020. The county uses the funds, in partnership with the Washington Conservation District, to provide countywide AIS programming, including watercraft inspections, early detection and rapid response, and education. The remaining funds, approximately $44,000, is available for treatment grants.