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Active Spring Monitoring Sites Network
Active Spring Monitoring Sites Network national well location map.
Active Spring Monitoring Sites Well Count: 108
Map generated 8/12/2022 5:58:21 AM
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For a list of network wells, click on a state or territory above or select from the box:

The Active Springs Monitoring Sites web pages provide data from more than 100 springs in the active measurement program of the U.S. Geological Survey across the nation. A spring reflects concentrated discharge of groundwater at the land surface. This focused discharge integrates hydrogeologic processes over large areas, and provides information about groundwater conditions as well as aquifer characteristics.

These web pages contain all sites in the USGS NWISWeb system designated as type “Spring” with at least one discharge measurement available within the last 13 months, regardless of measurement frequency or the monitoring objective. Periodic discharge measurements and daily values calculated from real time and non-real time continuous measurements are presented for each site. Spring sites with stage only are not included. Monthly statistics of spring discharge are calculated and presented using the same procedures that are used for groundwater levels on other web pages within the Groundwater Watch system. For spring sites with at least one year of approved daily values, Groundwater Watch produces a flow-duration curve, as described by Searcy in USGS Water Supply Paper 1542a, "Manual of Hydrology: Part 2. Low Flow Techniques". The diagram indicates what percent of time that springflow is equal or exceeded during a given period. To produce this cumulative frequency curve, the daily discharge during the period of approved daily values are ranked by magnitude, and the percent of time during which the flow equaled or exceeded the specified values is computed.

Details about the Groundwater Watch system are available on the Help Page.

Groundwater Watch is maintained by the Office of Groundwater.

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*References to non-Department of the Interior (DOI) products do not constitute an endorsement by the DOI.

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Last update: Monday, March 8, 2021 at 12:17
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