Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data
starting March 11, 2024
with a full decommission expected 6 months later.
Learn more about the upcoming change and where to find the new samples
data in our blog.
USGS 413648087084501 N TRIB LT CALUMET R ABV CONFL NRBURNS HARBOR IN