Updated in 2026 to include the invasive golden mussel, this document provides a step-by-step guide to help facility managers evaluate the vulnerability of their source water and infrastructure to invasive mussel infestations.
The guide can be applied to all types of raw water infrastructure — supporting drinking water and agricultural systems, municipal and private utilities, industrial facilities, and operations of all sizes and complexity.
Invasive mussels typically begin affecting infrastructure within three to five years after they enter a water body. By assessing risks early and understanding the potential financial impacts, facilities can better prepare for future increases in maintenance and operational costs.
While the information in this guide is more comprehensive than any single user may require, working through the sections that apply to your specific situation before mussels arrive can help reduce long-term costs. Proactive planning allows for thoughtful capital investments rather than costly emergency responses.