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Groundwater levels for the Nation

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USGS 404744073420801 N 9898. 1

Nassau County, New York
Latitude  40°47'44", Longitude  73°42'08" NAD27
Land-surface elevation 118.0 feet above NGVD29
This well is completed in the Northern Atlantic Coastal Plain aquifer system (S100NATLCP) national aquifer.
This well is completed in the Glacial Aquifer, Upper (112GLCLU) local aquifer.
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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
1991-11-0717:30 UTCm62610 22.57NGVD291OUSGSSA
1991-11-0717:30 UTCm62611 21.48NAVD881OUSGSSA
1991-11-0717:30 UTCm7201995.43  1OUSGSSA
2011-06-0217:31 UTCm62610 24.06NGVD294S  A
2011-06-0217:31 UTCm62611 22.97NAVD884S  A
2011-06-0217:31 UTCm7201993.94  4S  A
2014-04-1818:14 UTCm62610 24.81NGVD294SUSGSSA
2014-04-1818:14 UTCm62611 23.72NAVD884SUSGSSA
2014-04-1818:14 UTCm7201993.19  4SUSGSSA
2015-04-1514:52 UTCm62610 25.22NGVD294SUSGSSA
2015-04-1514:52 UTCm62611 24.13NAVD884SUSGSSA
2015-04-1514:52 UTCm7201992.78  4SUSGSSA
2017-04-2619:10 UTCm62610 19.27NGVD291TUSGSSA
2017-04-2619:10 UTCm62611 18.18NAVD881TUSGSSA
2017-04-2619:10 UTCm7201998.73  1TUSGSSA
2018-04-2314:50 UTCm62610 23.41NGVD291TUSGSSA
2018-04-2314:50 UTCm62611 22.32NAVD881TUSGSSA
2018-04-2314:50 UTCm7201994.59  1TUSGSSA
2019-04-1716:20 UTCm62610 24.73NGVD291VUSGSSA
2019-04-1716:20 UTCm62611 23.64NAVD881VUSGSSA
2019-04-1716:20 UTCm7201993.27  1VUSGSSA
2020-11-0317:51 UTCm62610 23.63NGVD291VUSGSSA
2020-11-0317:51 UTCm62611 22.54NAVD881VUSGSSA
2020-11-0317:51 UTCm7201994.37  1VUSGSSA
2021-05-0315:01 UTCm62610 24.17NGVD291VUSGSSA
2021-05-0315:01 UTCm62611 23.08NAVD881VUSGSSA
2021-05-0315:01 UTCm7201993.83  1VUSGSSA
2022-05-2512:37 UTCm62610 24.70NGVD294VUSGSSA
2022-05-2512:37 UTCm62611 23.61NAVD884VUSGSSA
2022-05-2512:37 UTCm7201993.30  4VUSGSSA
2023-04-1915:49 UTCm62610 24.75NGVD294VUSGSSA
2023-04-1915:49 UTCm62611 23.66NAVD884VUSGSSA
2023-04-1915:49 UTCm7201993.25  4VUSGSSA
2024-05-0715:50 UTCm62610 24.75NGVD294VUSGSSP
2024-05-0715:50 UTCm62611 23.66NAVD884VUSGSSP
2024-05-0715:50 UTCm7201993.25  4VUSGSSP

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
Status4GWTideAffected
Method of measurementOObserved.
Method of measurementSSteel-tape measurement.
Method of measurementTElectric-tape measurement.
Method of measurementVCalibrated electric-tape measurement.
Measuring agencyNot determined
Measuring agencyUSGSU.S. Geological Survey
Source of measurementNot determined
Source of measurementSMeasured by personnel of reporting agency.
Water-level approval statusAApproved for publication -- Processing and review completed.
Water-level approval statusPProvisional data subject to revision.