USGS Groundwater for USA: Water Levels -- 1 sites

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Groundwater levels for the Nation

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Nassau County, New York

Latitude 40°44'11", Longitude 73°41'37" NAD27

Land-surface elevation 99.2 feet above NGVD29

The depth of the well is 103 feet below land surface.

The depth of the hole is 115 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 Glacial Aquifer, Upper (112GLCLU) local aquifer.

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
1957-04-16		D	62610		52.42	NGVD29	1	O	USGS	S	A
1957-04-16		D	62611		51.31	NAVD88	1	O	USGS	S	A
1957-04-16		D	72019	46.78			1	O	USGS	S	A
1961-12-08		D	62610		50.60	NGVD29	1	O	USGS	S	A
1961-12-08		D	62611		49.49	NAVD88	1	O	USGS	S	A
1961-12-08		D	72019	48.60			1	O	USGS	S	A
1967-12-15		D	62610		35.40	NGVD29	1	O	USGS	S	A
1967-12-15		D	62611		34.29	NAVD88	1	O	USGS	S	A
1967-12-15		D	72019	63.80			1	O	USGS	S	A
1968-01-08		D	62610		35.40	NGVD29	1	O	USGS	S	A
1968-01-08		D	62611		34.29	NAVD88	1	O	USGS	S	A
1968-01-08		D	72019	63.80			1	O	USGS	S	A
1985-05-05	17:59 UTC	m	62610		37.63	NGVD29	1	O	USGS	S	A
1985-05-05	17:59 UTC	m	62611		36.52	NAVD88	1	O	USGS	S	A
1985-05-05	17:59 UTC	m	72019	61.57			1	O	USGS	S	A

**Explanation**
Section	Code	Description
Water-level date-time accuracy	D	Date is accurate to the Day
Water-level date-time accuracy	m	Date is accurate to the Minute
Parameter code	62610	Groundwater level above NGVD 1929, feet
Parameter code	62611	Groundwater level above NAVD 1988, feet
Parameter code	72019	Depth to water level, feet below land surface
Referenced vertical datum	NAVD88	North American Vertical Datum of 1988
Referenced vertical datum	NGVD29	National Geodetic Vertical Datum of 1929
Status	1	Static
Method of measurement	O	Observed.
Measuring agency	USGS	U.S. Geological Survey
Source of measurement	S	Measured by personnel of reporting agency.
Water-level approval status	A	Approved for publication -- Processing and review completed.

U.S. Department of the Interior | U.S. Geological Survey
Title: Groundwater for USA: Water Levels
URL: https://nwis.waterdata.usgs.gov/nwis/gwlevels?

Page Contact Information: USGS Water Data Support Team
Page Last Modified: 2025-02-17 19:58:17 EST
0.47 0.38 nadww01