USGS 133120144505471 GHURA-Dededo, Guam

DESCRIPTION:: Latitude 13°31'27.3", Longitude -144°50'59.7" NAD83
Guam, Guam , Hydrologic Unit 22010000; Well depth: 785 feet
Hole depth: 785 feet
Land surface altitude: 394.50 feet above GUVD04.
Well completed in "Other aquifers" (N9999OTHER) national aquifer.
Well completed in "Limestone" (100LMSN) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations (availability statement)	2010-06-08	2025-07-22
Daily Data
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD A, -131.69 )	2004-05-21	2005-02-23	807
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD B, -137.11 )	2004-05-21	2005-02-04	750
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C1, -143.07 )	2004-05-21	2004-10-28	246
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C2, -142.75 )	2004-12-18	2005-02-19	192
Groundwater level above local mean sea level (LMSL), feet	2004-05-21	2011-01-17	492
Daily Statistics
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD A, -131.69 )	2004-05-21	2005-02-23	269
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD B, -137.11 )	2004-05-21	2005-02-04	250
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C1, -143.07 )	2004-05-21	2004-10-28	82
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C2, -142.75 )	2004-12-18	2005-02-19	64
Groundwater level above local mean sea level (LMSL), feet	2004-05-21	2011-01-17	492
Monthly Statistics
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD A, -131.69 )	2004-05	2005-02
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD B, -137.11 )	2004-05	2005-02
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C1, -143.07 )	2004-05	2004-10
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C2, -142.75 )	2004-12	2005-02
Groundwater level above local mean sea level (LMSL), feet	2004-05	2011-01
Annual Statistics
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD A, -131.69 )	2004	2005
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD B, -137.11 )	2004	2005
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C1, -143.07 )	2004	2005
Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius -- ( GD C2, -142.75 )	2005	2005
Groundwater level above local mean sea level (LMSL), feet	2004	2011
Field groundwater-level measurements	1998-06-02	2025-07-22	92
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1979-10-17	1996-03-12	151
Water-Year Summary	2010	2013	4
Revisions	Loading...

OPERATION:: Record for this site is maintained by the USGS Pacific Islands Water Science Center; Email questions about this site to Pacific Islands Water Science Center Water-Data Inquiries

ADDITIONAL INFORMATION

For this site, "Field groundwater-level measurements"
displayed in "Table of data" or "Tab-separated
data" formats indicate water levels above two different vertical
datums for each measurement date and time, although only one of the
datums currently is appropriate and accurate for the measurement. In
general, the appropriate vertical datum is date dependent. The
appropriate datum for water levels measured before about 2005 to 2010
is LMSL (local mean sea level), whereas the appropriate datum for water
levels measured after about 2005 to 2010 is the most current vertical
datum available (GUVD04 for Guam; NMVD03 for Saipan). The dates that
are appropriate for each datum are site specific and have yet to be
determined for this site. Also, the vertical datum indicated in the
graphical output of "Field groundwater-level measurements"
may reflect an incorrect datum, depending on the range of dates being
displayed.


  
    
  

  
    

    

    Station operated in cooperation with the Water and Environmental Research
    Institute, University of Guam.


		Station operated in cooperation with the Water and Environmental Research Institute, University of Guam.

USGS 133120144505471 GHURA-Dededo, Guam

Well Site