USGS Groundwater for USA: Water Levels -- 1 sites

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Groundwater levels for the Nation

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Iroquois County, Illinois

Latitude 40°56'11", Longitude 87°56'00" NAD27

Land-surface elevation 665.00 feet above NGVD29

The depth of the well is 137 feet below land surface.

The depth of the hole is 137 feet below land surface.

This well is completed in the Silurian-Devonian aquifers (N400SLRDVN) national aquifer.

This well is completed in the Silurian System (350SLRN) 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
1941-08-29		D	62610		640.50	NGVD29	1	O			A
1941-08-29		D	62611		640.23	NAVD88	1	O			A
1941-08-29		D	72019	24.50			1	O			A
1976-04-19		D	62610		630.00	NGVD29	1	O			A
1976-04-19		D	62611		629.73	NAVD88	1	O			A
1976-04-19		D	72019	35.00			1	O			A
1984-04-23	20:30 UTC	m	62610		598.00	NGVD29	1	O	USGS	S	A
1984-04-23	20:30 UTC	m	62611		597.73	NAVD88	1	O	USGS	S	A
1984-04-23	20:30 UTC	m	72019	67.00			1	O	USGS	S	A
1984-11-08	18:50 UTC	m	62610		609.40	NGVD29	1	O	USGS	S	A
1984-11-08	18:50 UTC	m	62611		609.13	NAVD88	1	O	USGS	S	A
1984-11-08	18:50 UTC	m	72019	55.60			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		Not determined
Measuring agency	USGS	U.S. Geological Survey
Source of measurement		Not determined
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: 2024-12-11 17:58:25 EST
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