USGS -- Water Resources of the United States

Most recent Provisional daily data value: 22.27 on 11/23/09

Summary Statistics for Period of Continuous Record

Depth to water level, feet below land surface

Approved Daily Maximum Values Data Used in Analysis

Begin Date

End Date

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Groundwater Watch

Site Number: 390623077314201 - 50W 4C

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Watch Help Page

DESCRIPTION:: Latitude 39°06'23", Longitude 77°31'42" NAD27
Loudoun County, Virginia, Hydrologic Unit 02070008; Land surface altitude: 400.00 feet above sea level NGVD29.
Well completed in "Early Mesozoic basin aquifers" (N300ERLMZC) national aquifer.
Well completed in "BALLS BLUFF SILTSTONE" (231BLBF) local aquifer

AVAILABLE DATA FROM NWISWeb:

Real-time
Daily Data
Field ground-water-level measurements
Additional Data Sources	Begin Date	End Date	Count
Annual Water-Data Report (pdf) offsite	2006	2007	2

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

Site Statistics

Monthly statistics plot for 390623077314201

Most recent data value: 22.27 on 11/23/2009
Period of Record Monthly Statistics for 390623077314201
Depth to water level, feet below land surface
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 48.27 47.70 45.25 40.63 34.79 31.09 27.21 23
Feb 48.97 45.29 42.42 37.72 33.69 27.59 24.19 24
Mar 47.94 43.86 40.31 36.72 32.42 29.47 23.21 25
Apr 48.02 39.27 37.07 34.29 31.34 26.81 23.22 26
May 44.97 40.56 37.91 34.58 31.43 30.19 20.69 25
Jun 41.85 38.63 37.04 35.82 32.09 29.67 22.53 23
Jul 44.35 40.77 38.65 37.63 33.90 30.33 23.76 27
Aug 42.80 42.06 40.80 38.53 35.89 33.38 29.50 25
Sep 47.43 45.02 42.79 40.24 38.29 35.46 24.99 28
Oct 48.44 46.39 43.46 40.70 39.39 30.96 25.84 28
Nov 49.06 48.31 46.63 41.76 39.29 35.35 27.05 30
Dec 48.40 47.50 42.69 40.26 37.43 31.38 28.47 21

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Daily Groundwater Data

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Periodic Groundwater Data

Groundwater hydrograph for well 390623077314201

Summary Statistics for Period of Record Periodic Water Levels

Depth to water level, feet below land surface

Approved Periodic Water Level Values

Begin Date

End Date

Number of Values

10/13/77

10/07/09

307

Highest WL	Date of Highest WL	Lowest WL	Date of Lowest WL
21.19	04/24/08	49.06	11/27/85

	Groundwater Levels Options
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Period of Record - All Data Types

Period of record plot for well 390623077314201

Summary Statistics for Period of Record - All Data Types

Depth to water level, feet below land surface

Begin Date

End Date

Number of Values

10/13/77

11/23/09

1,499

Highest WL	Date of Highest WL	Lowest WL	Date of Lowest WL
19.73	05/17/08	49.06	11/27/85

	Period of Record Options
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	Download Groundwater levels in text format of all data types

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Last update: Monday, September 14, 2009 at 11:44