Well Location (Questor) Maps

The Survey has an extensive well database. Here are the number of records in the database as of September 25, 2019:

• Oil/Gas records/wells - 206,264 / 173,947
• Oil/Gas wells with formation tops picked - 102,072
• Water well records - 302,017
• Water well drillers logs - 265,734
• Other well types include coal borings - 91,143

Prices

• Retrieval/set-up fee - $20.00
• Media Charge: CD-ROM - 10.00
• Well header records (per well) - $0.09
• Well formation tops/ Driller's logs (per well) - $0.09
• Printed data page - $0.30
• Faxed data page - $1.50
• Additional Output Format - $20.00

Additional Information

Example map of various wells in Dupage County and of the text data available with the maps.

Output File Descriptions

Oil and gas wells (PDF)
Water wells (PDF)

Code Lookup Tables

County Codes: Excel OR PDF
Formation Codes: Excel OR PDF
Oil/Gas Field Codes: Excel OR PDF
Well Status Codes: Excel OR PDF

To order data extracts or 8.5 x 11 paper (Questor) maps for a specific area in Illinois call 217-333-5109 or fax 217-244-4544. Prepayment required.