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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 a daily snapshot of water-level statistics in the network for April 2021.
Refer to the map key for more information. Documentation on the statistics can be found in the Groundwater Watch help section.
USGS Groundwater Watch - Active Groundwater Level NetworkThe 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.