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Groundwater levels for the Nation

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Agency code = usgs
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  • 420001087595201
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USGS 420001087595201 41N11E-33.8a

Cook County, Illinois
Latitude  42°00'01.14", Longitude  87°59'51.54" NAD83
Land-surface elevation 685 feet above NGVD29
The depth of the well is 20.2 feet below land surface.
The depth of the hole is 20.2 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
Graph of data
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
2012-03-2220:00 UTCm62610 672.19NGVD291VUSGSSA
2012-03-2220:00 UTCm62611 671.90NAVD881VUSGSSA
2012-03-2220:00 UTCm7201912.81  1VUSGSSA
2012-04-2320:48 UTCm62610 672.00NGVD291VUSGSSA
2012-04-2320:48 UTCm62611 671.71NAVD881VUSGSSA
2012-04-2320:48 UTCm7201913.00  1VUSGSSA
2012-06-0622:53 UTCm62610 671.03NGVD291VUSGSSA
2012-06-0622:53 UTCm62611 670.74NAVD881VUSGSSA
2012-06-0622:53 UTCm7201913.97  1VUSGSSA
2012-06-0715:06 UTCm62610 671.64NGVD291VUSGSSA
2012-06-0715:06 UTCm62611 671.35NAVD881VUSGSSA
2012-06-0715:06 UTCm7201913.36  1VUSGSSA
2012-08-2018:17 UTCm62610 671.13NGVD291VUSGSSA
2012-08-2018:17 UTCm62611 670.84NAVD881VUSGSSA
2012-08-2018:17 UTCm7201913.87  1VUSGSSA
2012-09-2022:36 UTCm62610 670.98NGVD291VUSGSSA
2012-09-2022:36 UTCm62611 670.69NAVD881VUSGSSA
2012-09-2022:36 UTCm7201914.02  1VUSGSSA
2012-11-0815:20 UTCm62610 671.26NGVD291VUSGSSA
2012-11-0815:20 UTCm62611 670.97NAVD881VUSGSSA
2012-11-0815:20 UTCm7201913.74  1VUSGSSA
2013-01-3114:00 UTCm62610 672.51NGVD291VUSGSSA
2013-01-3114:00 UTCm62611 672.22NAVD881VUSGSSA
2013-01-3114:00 UTCm7201912.49  1VUSGSSA
2013-03-2522:16 UTCm62610 672.50NGVD291VUSGSSA
2013-03-2522:16 UTCm62611 672.21NAVD881VUSGSSA
2013-03-2522:16 UTCm7201912.50  1VUSGSSA
2013-05-1716:24 UTCm62610 672.16NGVD291VUSGSSA
2013-05-1716:24 UTCm62611 671.87NAVD881VUSGSSA
2013-05-1716:24 UTCm7201912.84  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.