Follow this river and you are sure to find something that inspires or surprises you. It is a busy industrial front, an urban focal point, a home river, a public getaway, a prairie's edge. What might you discover?
Float on down past our resource briefs and reports to see what we're learning about this stretch of the nation's river.
Resources Briefs are condensed versions of our technical reports. They rely on graphics and images more than dense scientific writing, but anyone who is intrigued and wants to know more can always use the resource brief as an entry into the report.
Dragonfly Mercury Project
Find out the latest about mercury and dragonfly larvae at your park!
As a foundational part of the aquatic food web, dragonfly larvae we collect each summer are tested for mercury in the environment, which helps us understand mercury contamination at higher levels of the food web.
Visit the website below to find the latest "dragonflier" for the upper Mississippi River.
The Dragonfly Mercury Project Annual Data Fliers (usgs.gov)
Last updated: October 4, 2023