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Groundwater levels for the Nation

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USGS 404650073444501 N 8342. 1

Nassau County, New York
Latitude  40°46'42", Longitude  73°44'05" NAD27
Land-surface elevation 21.8 feet above NGVD29
The depth of the well is 434 feet below land surface.
The depth of the hole is 446 feet below land surface.
This well is completed in the Northern Atlantic Coastal Plain aquifer system (S100NATLCP) national aquifer.
This well is completed in the Lloyd Aquifer (211LLYD) 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
1974-01-28 D62610 3.63NGVD291OUSGSSA
1974-01-28 D62611 2.55NAVD881OUSGSSA
1974-01-28 D7201918.17  1OUSGSSA
1975-03-13 D62610 2.20NGVD291OUSGSSA
1975-03-13 D62611 1.12NAVD881OUSGSSA
1975-03-13 D7201919.60  1OUSGSSA
1976-01-20 D62610 1.55NGVD291OUSGSSA
1976-01-20 D62611 0.47NAVD881OUSGSSA
1976-01-20 D7201920.25  1OUSGSSA
1977-01-24 D62610 1.53NGVD291OUSGSSA
1977-01-24 D62611 0.45NAVD881OUSGSSA
1977-01-24 D7201920.27  1OUSGSSA
1978-03-24 D62610 1.21NGVD291OUSGSSA
1978-03-24 D62611 0.13NAVD881OUSGSSA
1978-03-24 D7201920.59  1OUSGSSA
1979-01-18 D62610 -3.22NGVD291OUSGSSA
1979-01-18 D62611 -4.30NAVD881OUSGSSA
1979-01-18 D7201925.02  1OUSGSSA
1980-01-22 D62610 0.56NGVD291OUSGSSA
1980-01-22 D62611 -0.52NAVD881OUSGSSA
1980-01-22 D7201921.24  1OUSGSSA
1981-01-15 D62610 1.00NGVD291OUSGSSA
1981-01-15 D62611 -0.08NAVD881OUSGSSA
1981-01-15 D7201920.80  1OUSGSSA
1982-01-1508:52 UTCm62610 1.75NGVD291OUSGSSA
1982-01-1508:52 UTCm62611 0.67NAVD881OUSGSSA
1982-01-1508:52 UTCm7201920.05  1OUSGSSA
1983-01-0610:46 UTCm62610 -1.62NGVD291OUSGSSA
1983-01-0610:46 UTCm62611 -2.70NAVD881OUSGSSA
1983-01-0610:46 UTCm7201923.42  1OUSGSSA
1984-01-1008:42 UTCm62610 -5.06NGVD291OUSGSSA
1984-01-1008:42 UTCm62611 -6.14NAVD881OUSGSSA
1984-01-1008:42 UTCm7201926.86  1OUSGSSA
1985-01-1409:44 UTCm62610 3.59NGVD291OUSGSSA
1985-01-1409:44 UTCm62611 2.51NAVD881OUSGSSA
1985-01-1409:44 UTCm7201918.21  1OUSGSSA
1986-02-0413:00 UTCm62610 3.47NGVD294OUSGSSA
1986-02-0413:00 UTCm62611 2.39NAVD884OUSGSSA
1986-02-0413:00 UTCm7201918.33  4OUSGSSA
1988-12-2818:55 UTCm62610 3.72NGVD294OUSGSSA
1988-12-2818:55 UTCm62611 2.64NAVD884OUSGSSA
1988-12-2818:55 UTCm7201918.08  4OUSGSSA
1990-03-2916:55 UTCm62610 7.42NGVD294OUSGSSA
1990-03-2916:55 UTCm62611 6.34NAVD884OUSGSSA
1990-03-2916:55 UTCm7201914.38  4OUSGSSA
1991-04-0318:05 UTCm62610 9.51NGVD294OUSGSSA
1991-04-0318:05 UTCm62611 8.43NAVD884OUSGSSA
1991-04-0318:05 UTCm7201912.29  4OUSGSSA

Explanation
SectionCodeDescription
Water-level date-time accuracyDDate is accurate to the Day
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
Status4GWTideAffected
Method of measurementOObserved.
Measuring agencyUSGSU.S. Geological Survey
Source of measurementSMeasured by personnel of reporting agency.
Water-level approval statusAApproved for publication -- Processing and review completed.