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USGS Water-Quality Monthly Statistics for the Nation

! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting in February 2024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.

Choose Site Selection Criteria
Choose from the following criteria to constrain the number of sites selected.   If no additional site-selection criteria are chosen and no additional specifications are defined on the following page then output will be for all 6,675 sites that have monthly statistics.

          Site
   -- Location --

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          Site
   -- Identifier --

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          Site
   -- Attribute --

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          Data
   -- Attribute * --

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