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Groundwater levels for the Nation

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Agency code = usgs
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  • 421640088120001
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USGS 421640088120001 44N 9E-20.1d1

Mchenry County, Illinois
Latitude  42°16'40", Longitude  88°12'00" NAD27
Land-surface elevation 760 feet above NGVD29
The depth of the well is 122 feet below land surface.
The depth of the hole is 122 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 Pleistocene Series (112PLSC) local aquifer.
Output formats
Table of data
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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
1940-07 M62610 690.00NGVD291O  A
1940-07 M62611 689.73NAVD881O  A
1940-07 M7201970.00  1O  A
1954 Y62610 736.00NGVD291O  A
1954 Y62611 735.73NAVD881O  A
1954 Y7201924.00  1O  A
1985-10-0116:30 UTCm62610 644.00NGVD291OIL006AA
1985-10-0116:30 UTCm62611 643.73NAVD881OIL006AA
1985-10-0116:30 UTCm72019116.00  1OIL006AA

Explanation
SectionCodeDescription
Water-level date-time accuracyMDate is accurate to the Month
Water-level date-time accuracyYDate is accurate to the Year
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 measurementOObserved.
Measuring agencyNot determined
Measuring agencyIL006State of Illinois Environmental Protection Agency
Source of measurementNot determined
Source of measurementAReported by another government agency (do not use "A" if reported by owner, use "O").
Water-level approval statusAApproved for publication -- Processing and review completed.