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Groundwater Watch

Site Number: 404753073440303 - N 4266. 2

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Watch Help Page

DESCRIPTION:: Latitude 40°47'52", Longitude 73°44'03" NAD27
Nassau County, New York, Hydrologic Unit 02030201; Land surface altitude: 57.0 feet above sea level NGVD29.
Well completed in "Northern Atlantic Coastal Plain aquifer system" (S100NATLCP) national aquifer.
Well completed in "LLOYD AQUIFER" (211LLYD) local aquifer

AVAILABLE DATA FROM NWISWeb:

Daily Data
Elevation above NGVD 1929, feet	2002-08-24	2009-05-25	2452
Daily Statistics
Elevation above NGVD 1929, feet	2002-08-24	2007-09-30	1854
Monthly Statistics
Elevation above NGVD 1929, feet	2002-08	2007-09
Annual Statistics
Elevation above NGVD 1929, feet	2002	2007
Field ground-water-level measurements
Additional Data Sources	Begin Date	End Date	Count
Annual Water-Data Report (pdf) offsite	2005	2006	2

OPERATION:: Record for this site is maintained by the USGS New York Water Science Center; Email questions about this site to New York Water Science Center Water-Data Inquiries

Site Statistics

Monthly statistics plot for 404753073440303

Most recent data value: 18.48 on 10/21/2009
Period of Record Monthly Statistics for 404753073440303
Elevation above NGVD 1929, feet
All Approved Continuous & Periodic Data Used In Analysis
Note: Bold values in the table indicate closest statistic to the most recent data value.
Month Lowest
Level 10th
%ile 25th
%ile 50th
%ile 75th
%ile 90th
%ile Highest
Level Number
of
Years
Jan 0.36 2.63 8.26 10.88 14.00 19.42 19.75 30
Feb 0.53 2.38 8.07 11.55 13.96 19.85 19.99 27
Mar 0.59 4.26 6.22 10.53 13.62 19.47 20.44 40
Apr -5.64 4.41 9.00 11.68 14.07 19.83 20.63 26
May -4.77 1.36 8.29 10.33 14.69 19.07 20.45 29
Jun -4.24 -2.39 4.08 8.99 11.81 18.22 18.94 30
Jul -7.50 -6.62 1.48 6.13 10.33 17.89 18.43 28
Aug -8.23 -2.57 0.48 7.20 11.15 16.95 17.57 29
Sep -9.42 -6.18 1.90 7.83 12.20 17.06 18.86 32
Oct -1.03 0.78 5.69 9.62 15.22 18.16 19.10 28
Nov -1.12 2.29 7.47 11.05 14.60 18.77 19.24 28
Dec -0.17 2.86 8.01 11.06 13.56 19.05 19.64 32

Statistics Options

View month/year statistics

Daily Groundwater Data

Most recent Provisional daily data value: 17.74 on 10/20/09
Summary Statistics for Period of Continuous Record
Elevation above NGVD 1929, feet
Approved Daily Mean Values Data Used in Analysis
Begin Date	End Date		Days	% Complete
08/24/02	09/30/07		1,854	99
Min Level		Mean		Max Level
7.36		17.60		21.05

	Daily Data Options
	View latest data from NWISWeb
	View data in calendar format
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	View daily medians

Periodic Groundwater Data

Groundwater hydrograph for well 404753073440303

Summary Statistics for Period of Record Periodic Water Levels

Elevation above NGVD 1929, feet

Approved Periodic Water Level Values

Begin Date

End Date

Number of Values

12/30/54

10/21/09

728

Lowest WL	Date of Lowest WL	Highest WL	Date of Highest WL
-9.43	09/09/83	20.87	04/04/06

	Groundwater Levels Options
	View NWISWeb Groundwater levels page
	Download Groundwater levels in text format

Period of Record - All Data Types

Period of record plot for well 404753073440303

Summary Statistics for Period of Record - All Data Types

Depth to water level, feet below land surface

Begin Date

End Date

Number of Values

12/30/54

10/21/09

3,326

Highest WL	Date of Highest WL	Lowest WL	Date of Lowest WL
-9.43	09/09/83	21.05	04/16/07

	Period of Record Options
	View annual monthly statistics for all data types
	Download Groundwater levels in text format of all data types

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URL: http://groundwaterwatch.usgs.gov/AWLSites.asp
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Last update: Monday, September 14, 2009 at 11:44