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Water Quality Samples for Washington

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The WA Water Science Center has transitioned to a new data management software package. While you may not have noticed this transition, some sites may have problems or delays in being updated. We are actively monitoring these conditions and are resolving them as quickly as possible. See the Dec 8 news entry for more information at: https://help.waterdata.usgs.gov/news


Some complex retrievals may take a few minutes.
Choose Site Selection Criteria
There are 15,478 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.