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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Inventory Page

USGS Parameter Group Data Types Start Date End Date
Inorganics, Major, Metals Water-quality 1987-10-21 1987-10-21
Inorganics, Major, Non-metals Water-quality 1987-10-21 1987-10-21
Inorganics, Minor, Non-metals Water-quality 1987-10-21 1987-10-21
Inorganics, Minor, metals Water-quality 1987-10-21 1987-10-21
Nutrient Water-quality 1987-10-21 1987-10-21
Organics, other Water-quality 1987-10-21 1987-10-21
Physical Water-quality 1987-10-21 1987-10-21
Water Data for the Nation inventory

Monitoring location 420341087493001 is associated with a Well in Cook County, Illinois. Water data back to 1987 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
420341087493001 n/a
Site name
41N12E-12.7d1 n/a
Site type
Well
GW
DMS latitude 420341 n/a
DMS longitude 0874930 n/a
Decimal latitude 42.0614176 n/a
Decimal longitude -87.8250642 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Unknown or unspecified. U
Latitude-longitude datum
North American Datum of 1927 NAD27
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Illinois 17
State
Illinois 17
County
Cook County 031
Country US n/a
Land net location description n/a
Name of location map n/a
Scale of location map n/a
Altitude of Gage/land surface 658 feet n/a
Method altitude determined U n/a
Altitude accuracy 1 feet n/a
Altitude datum
National Geodetic Vertical Datum of 1929 NGVD29
Subbasin hydrologic unit
07120004
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation CST n/a
Site honors Daylight Saving Time
N n/a
Data reliability
Unchecked data. U
Data-other GW files NYNNNNNN n/a
National aquifer n/a
Local aquifer n/a
Local aquifer type
n/a
Well depth 1402 feet n/a
Hole depth
n/a
Source of depth data A n/a
Project number n/a