High Risk of Infestation

Recommended Preventive Measures:

• Monitor local water quality and physical parameters for any changes monthly.

• Complete a risk inventory every 6 months, using recently collected data.

• Pay careful attention to the status and/or spread of zebra mussels within the local area.

• Begin a monitoring program for adults and veligers on a weekly basis for all months with ambient water temperatures above 12 ºC.

• Establish a working relationship with state and local agencies that have access to detailed physio-chemical data sets as well as current local zebra mussel information. Design basic control measures that can be implemented quickly, in the event that infestation occurs. Appropriate long-term control strategies should be designed as well.

• If adult zebra mussels are observed attached to substrates in the area, begin an appropriate control program immediately (see the Management and Control section).

Risk Assessment Contents