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The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows snapshots of water-level statistics in the network during June 2022.
Refer to the map key for more information. Documentation on the statistics can be found in the Groundwater Watch help section.
Public Domain.
Source:
USGS Groundwater Watch - Active Groundwater Level Network
https://groundwaterwatch.usgs.gov/default.asp
The Active Groundwater Level Network contains water levels and well information from wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. This network includes all of these wells, regardless of measurement frequency, aquifer monitored, or the monitoring objective.