How polluted are the streams?
Duluth is fortunate that the streams are high quality. The quality is reflected in the fact that 12 of the streams are designated as trout streams and natural populations of trout have been found in at least three other streams. However, many of the streams are under stress from temperature due to warm run-off from impervious surfaces (Miller Creek), clearing of streamside vegetation, and turbidity due to high sediment levels from erosion and runoff (such as Amity Creek and Lester River; also the Nemadji River). There are also fish consumption advisories for Lester and St. Louis River based on mercury (Hg) levels and for other organic contaminants in lower St. Louis River and Duluth-Superior Harbor fish. Find out more about the Listing of impaired waters at MPCA’s website and about fish consumption advisories here.
