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Groundwater levels for the Nation

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  • 420121087583401
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USGS 420121087583401 41N11E-22.7a

Cook County, Illinois
Latitude  42°01'20.6", Longitude  87°58'33.8" NAD83
Land-surface elevation 705 feet above NGVD29
The depth of the well is 43.7 feet below land surface.
The depth of the hole is 44 feet below land surface.
This well is completed in the Sand and gravel aquifers (glaciated regions) (N100GLCIAL) national aquifer.
This well is completed in the Quaternary System (110QRNR) local aquifer.
Output formats
Table of data
Tab-separated data
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Reselect period
Date Time
?
 
Water-level
date-time
accuracy
?
 
Parameter
code
Water
level,
feet
below
land
surface
Water
level,
feet
above
specific
vertical
datum
Referenced
vertical
datum
?
 
Status
?
 
Method of
measurement
?
 
Measuring
agency
?
 
Source of
measurement
?
 
Water-level
approval
status
2012-04-2316:05 UTCm62610 678.58NGVD291VUSGSSA
2012-04-2316:05 UTCm62611 678.28NAVD881VUSGSSA
2012-04-2316:05 UTCm7201926.42  1VUSGSSA
2012-06-0620:26 UTCm62610 678.13NGVD291VUSGSSA
2012-06-0620:26 UTCm62611 677.83NAVD881VUSGSSA
2012-06-0620:26 UTCm7201926.87  1VUSGSSA
2012-06-0712:11 UTCm62610 678.53NGVD291VUSGSSA
2012-06-0712:11 UTCm62611 678.23NAVD881VUSGSSA
2012-06-0712:11 UTCm7201926.47  1VUSGSSA
2012-08-2012:17 UTCm62610 677.16NGVD291VUSGSSA
2012-08-2012:17 UTCm62611 676.86NAVD881VUSGSSA
2012-08-2012:17 UTCm7201927.84  1VUSGSSA
2012-08-2914:32 UTCm62610 676.60NGVD291VUSGSSA
2012-08-2914:32 UTCm62611 676.30NAVD881VUSGSSA
2012-08-2914:32 UTCm7201928.40  1VUSGSSA
2012-09-0615:33 UTCm62610 676.75NGVD291VUSGSSA
2012-09-0615:33 UTCm62611 676.45NAVD881VUSGSSA
2012-09-0615:33 UTCm7201928.25  1VUSGSSA
2012-09-2023:08 UTCm62610 676.73NGVD291VUSGSSA
2012-09-2023:08 UTCm62611 676.43NAVD881VUSGSSA
2012-09-2023:08 UTCm7201928.27  1VUSGSSA
2012-09-2720:40 UTCm62610 676.66NGVD291VUSGSSA
2012-09-2720:40 UTCm62611 676.36NAVD881VUSGSSA
2012-09-2720:40 UTCm7201928.34  1VUSGSSA
2012-11-0716:32 UTCm62610 676.33NGVD291VUSGSSA
2012-11-0716:32 UTCm62611 676.03NAVD881VUSGSSA
2012-11-0716:32 UTCm7201928.67  1VUSGSSA
2012-11-0816:10 UTCm62610 676.31NGVD291VUSGSSA
2012-11-0816:10 UTCm62611 676.01NAVD881VUSGSSA
2012-11-0816:10 UTCm7201928.69  1VUSGSSA
2013-01-3112:47 UTCm62610 677.76NGVD291VUSGSSA
2013-01-3112:47 UTCm62611 677.46NAVD881VUSGSSA
2013-01-3112:47 UTCm7201927.24  1VUSGSSA
2013-03-2517:54 UTCm62610 677.56NGVD291VUSGSSA
2013-03-2517:54 UTCm62611 677.26NAVD881VUSGSSA
2013-03-2517:54 UTCm7201927.44  1VUSGSSA
2013-05-1711:47 UTCm62610 678.51NGVD291VUSGSSA
2013-05-1711:47 UTCm62611 678.21NAVD881VUSGSSA
2013-05-1711:47 UTCm7201926.49  1VUSGSSA

Explanation
SectionCodeDescription
Water-level date-time accuracymDate is accurate to the Minute
Parameter code62610Groundwater level above NGVD 1929, feet
Parameter code62611Groundwater level above NAVD 1988, feet
Parameter code72019Depth to water level, feet below land surface
Referenced vertical datumNAVD88North American Vertical Datum of 1988
Referenced vertical datumNGVD29National Geodetic Vertical Datum of 1929
Status1Static
Method of measurementVCalibrated electric-tape measurement.
Measuring agencyUSGSU.S. Geological Survey
Source of measurementSMeasured by personnel of reporting agency.
Water-level approval statusAApproved for publication -- Processing and review completed.