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Water Quality Samples for the Nation

! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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.
Select sites that have samples which meet the following criteria:
Define one or more values for each of the following site-selection criteria: --- or select new criteria
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 Site Number --
exact match    match from the start    match any part
 
Choose Output Format
Display Summary of Selected Sites
Choose one of the following options for displaying descriptions of the sites meeting the criteria above:
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Show sites on a mapNew
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Table of sites
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Scroll list of sites -- allows selection of data for multiple sites
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Brief descriptions -- allows selection of data for multiple sites
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        (Select fields to include in site-description output)
       
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Save file of selected sites to local disk for future upload

Retrieve Water-Quality Samples for Selected Sites
Choose one of the following options for displaying data for the sites meeting the criteria above
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Parameter Group Period of Record table
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Retrieve data from: to: (YYYY-MM-DD -- Blank = all data)
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Retrieve sample time and time zone as stored   in UTC
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Retrieve samples for specified parameter values: (Parameter Code) (Numeric Value)
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Samples and parameters to include:
   Samples that include only above parameter selection criteria (Count: 0)
   Samples that include above selection criteria and all associated parameters
   
    <--Find parameter codes
   Samples that include above selection criteria plus one or more of these parameters in a file
    Enter the full pathname of a file containing parameter codes. (Limit: 200 codes)
    

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Table of data
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Tab-separated data *

 * Save compressed files with a .gz file extension.