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Groundwater levels for the Nation

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Agency code = usgs
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  • 415930088110602
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USGS 415930088110602 41N 9E-34.1b1

Cook County, Illinois
Latitude  41°59'30", Longitude  88°11'06" NAD27
Land-surface elevation 804 feet above NAVD88
The depth of the well is 200 feet below land surface.
This well is completed in the Silurian-Devonian aquifers (N400SLRDVN) national aquifer.
This well is completed in the Silurian System (350SLRN) local aquifer.
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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
1984-09-1816:30 UTCm62610 736.27NGVD291OIL006AP
1984-09-1816:30 UTCm62611 736.00NAVD881OIL006AP
1984-09-1816:30 UTCm7201968.00  1OIL006AP
1984-10-3019:15 UTCm62610 738.27NGVD291OIL006AP
1984-10-3019:15 UTCm62611 738.00NAVD881OIL006AP
1984-10-3019:15 UTCm7201966.00  1OIL006AP
1985-03-0116:45 UTCm62610 740.27NGVD291OIL006AP
1985-03-0116:45 UTCm62611 740.00NAVD881OIL006AP
1985-03-0116:45 UTCm7201964.00  1OIL006AP

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 measurementOObserved.
Measuring agencyIL006State of Illinois Environmental Protection Agency
Source of measurementAReported by another government agency (do not use "A" if reported by owner, use "O").
Water-level approval statusPProvisional data subject to revision.