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Water Quality Samples for Iowa

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Boating safety tips are available from the U.S. Coast Guard.

NOTE: Station Numbers for Iowa precipitation gages have changed (see list).


! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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.
Some complex retrievals may take a few minutes.
Choose Site Selection Criteria
There are 6,576 sites with water-quality data. Choose at least one of the following criteria to constrain the number of sites selected.

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          Data
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* Selection of more than one data attribute will include all samples that meet all conditions selected.