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Groundwater levels for the Nation

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Agency code = usgs
site_no list =
  • 421020088334501
Minimum number of levels = 1
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USGS 421020088334501 43N6E-29.5c

Mchenry County, Illinois
Latitude  42°10'20", Longitude  88°33'45" NAD27
Land-surface elevation 903 feet above NGVD29
The depth of the well is 400 feet below land surface.
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
1979-05-02 D62610 862.00NGVD291S  A
1979-05-02 D62611 861.83NAVD881S  A
1979-05-02 D7201941.00  1S  A
1980-01-15 D62610 851.20NGVD291S  A
1980-01-15 D62611 851.03NAVD881S  A
1980-01-15 D7201951.80  1S  A
1980-02-28 D62610 856.02NGVD291S  A
1980-02-28 D62611 855.85NAVD881S  A
1980-02-28 D7201946.98  1S  A
1980-04-22 D62610 855.55NGVD291S  A
1980-04-22 D62611 855.38NAVD881S  A
1980-04-22 D7201947.45  1S  A
1980-06-05 D62610 858.37NGVD291S  A
1980-06-05 D62611 858.20NAVD881S  A
1980-06-05 D7201944.63  1S  A
1980-07-09 D62610 854.59NGVD291S  A
1980-07-09 D62611 854.42NAVD881S  A
1980-07-09 D7201948.41  1S  A
1980-07-31 D62610 855.06NGVD291S  A
1980-07-31 D62611 854.89NAVD881S  A
1980-07-31 D7201947.94  1S  A
1980-09-05 D62610 856.24NGVD291S  A
1980-09-05 D62611 856.07NAVD881S  A
1980-09-05 D7201946.76  1S  A
1980-10-02 D62610 851.77NGVD291S  A
1980-10-02 D62611 851.60NAVD881S  A
1980-10-02 D7201951.23  1S  A
1980-11-01 D62610 851.77NGVD291S  A
1980-11-01 D62611 851.60NAVD881S  A
1980-11-01 D7201951.23  1S  A
1980-12-04 D62610 856.52NGVD291S  A
1980-12-04 D62611 856.35NAVD881S  A
1980-12-04 D7201946.48  1S  A

Explanation
SectionCodeDescription
Water-level date-time accuracyDDate is accurate to the Day
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 measurementSSteel-tape measurement.
Measuring agencyNot determined
Source of measurementNot determined
Water-level approval statusAApproved for publication -- Processing and review completed.