100+ Free IL Well Driller Practice Questions

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Question 1

Score: 0/0

What is the EPA maximum contaminant level (MCL) for total coliform bacteria?

Zero (absent)

5 colonies per 100 mL

1 colony per 100 mL

10 colonies per 100 mL

to track

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Free Well Driller Practice Test by State 2026: 2,500+ Questions21 min read

2026 Statistics

Key Facts: IL Well Driller Exam

70%

Passing Score

State DNR

100 Q

Practice Questions

OpenExamPrep

2 hrs

Exam Time

State DNR

8 hrs

CE Per Cycle

State DNR

$250

License Fee

LicenseMap 2026

Illinois requires well drillers and pump installers to pass a state licensing exam covering well construction standards, groundwater protection, and IDPH regulations under the Water Well Construction Code.

Sample IL Well Driller Practice Questions

Try these sample questions to test your IL Well Driller exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which Illinois state agency oversees the licensing of water well contractors and pump installation contractors?

A.Illinois Environmental Protection Agency

B.Illinois Department of Public Health (IDPH)

C.Illinois Department of Natural Resources

D.Illinois Commerce Commission

Explanation: The Illinois Department of Public Health (IDPH), Division of Environmental Health, oversees the licensing of water well contractors and pump installation contractors under the Water Well and Pump Installation Contractor's License Act (225 ILCS 345) and the associated codes (77 IAC Parts 915, 920, and 925).

2What Illinois statute establishes the licensing requirements for water well and pump installation contractors?

A.225 ILCS 200

B.225 ILCS 345

C.415 ILCS 30

D.77 IAC 920

Explanation: The Water Well and Pump Installation Contractor's License Act (225 ILCS 345) establishes the licensing requirements for water well contractors and pump installation contractors in Illinois. The associated administrative codes (77 IAC Parts 915, 920, and 925) provide the detailed rules.

3How many parts does the Illinois water well contractor licensing examination consist of?

A.2 parts

B.3 parts

C.4 parts

D.5 parts

Explanation: The Illinois examination consists of 4 parts. Water Well Contractors must pass Parts 1 and 3, Pump Installation Contractors must pass Parts 2 and 4, and applicants seeking a Combined License must pass all 4 parts. A minimum score of 70% is required on each part.

4What is the minimum passing score for each part of the Illinois water well contractor examination?

A.60%

B.65%

C.70%

D.80%

Explanation: A minimum passing score of 70% is required on each part of the Illinois water well contractor examination. Water Well Contractors must pass Parts 1 and 3, Pump Installation Contractors must pass Parts 2 and 4, and Combined License holders must pass all 4 parts.

5What is the examination fee for a Water Well Contractor license exam in Illinois?

A.$25

B.$50

C.$75

D.$100

Explanation: The examination fee for a Water Well Contractor license exam in Illinois is $50 per exam. The Pump Installation Contractor exam also costs $50, while the combined (Water Well + Pump) exam costs $80.

6What is the annual renewal fee for a single license (water well or pump installation) in Illinois?

A.$15

B.$25

C.$35

D.$50

Explanation: The annual renewal fee for a single license (either water well contractor or pump installation contractor) in Illinois is $25. For contractors holding both licenses (combined), the annual renewal fee is $35.

7Which Illinois Administrative Code part governs the Water Well Construction Code?

A.77 IAC Part 915

B.77 IAC Part 920

C.77 IAC Part 925

D.77 IAC Part 930

Explanation: 77 IAC Part 920 is the Illinois Water Well Construction Code, which establishes construction standards for water wells. Part 915 covers the Contractor's License Code, and Part 925 covers the Water Well Pump Installation Code.

8What Illinois statute establishes the Water Well Construction Code?

A.225 ILCS 345

B.415 ILCS 30

C.415 ILCS 5

D.415 ILCS 60

Explanation: The Illinois Water Well Construction Code (415 ILCS 30) establishes the statutory framework for water well construction standards. The administrative rules implementing this statute are found in 77 IAC Part 920.

9Which Illinois Administrative Code part governs the Water Well Pump Installation Code?

A.77 IAC Part 915

B.77 IAC Part 920

C.77 IAC Part 925

D.77 IAC Part 930

Explanation: 77 IAC Part 925 is the Illinois Water Well Pump Installation Code, which establishes standards for the installation of pumps and pumping equipment in water wells. Part 920 covers Well Construction and Part 915 covers Contractor Licensing.

10Under 77 IAC Part 920, who is authorized to construct water wells in Illinois?

A.Any property owner

B.Only persons with a valid license under 225 ILCS 345 unless exempt

C.Only state employees

D.Only registered engineers

Explanation: Under 77 IAC 920.30(a), water wells subject to the code shall be constructed only by persons having a valid license under the Illinois Water Well and Pump Installation Contractor's License Act (225 ILCS 345) unless exempt under provisions of that Act.

About the IL Well Driller Exam

The Illinois well driller exam covers state well construction standards, casing and grouting requirements, pump installation, groundwater protection, IDPH licensing regulations, well abandonment procedures, and professional practice under the Illinois Water Well Construction Code.

Questions

100 scored questions

Time Limit

2 hours

Passing Score

70%

Exam Fee

$250 (Illinois Department of Public Health)

IL Well Driller Exam Content Outline

25%

Well Construction

Casing, grouting, well design, drilling methods, well development

20%

Pump Installation

Pump types, sizing, electrical connections, pressure systems, maintenance

20%

Regulations

IDPH licensing, well code, reporting requirements, fees, CE requirements

20%

Groundwater

Aquifer protection, water quality, contamination prevention, Illinois geology

15%

Professional Practice

Well logs, abandonment procedures, safety, contracts, client relations

How to Pass the IL Well Driller Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: 2 hours
Exam fee: $250

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

IL Well Driller Study Tips from Top Performers

1Master Illinois' Water Well Construction Code and casing requirements

2Understand proper grouting procedures and materials for Illinois glacial geology

3Study pump types, sizing calculations, and electrical connection requirements

4Know groundwater protection measures for Illinois' major aquifer systems

5Review well log documentation requirements and abandonment procedures

Frequently Asked Questions

What does the Illinois well driller exam cover?

The exam covers well construction standards, casing and grouting requirements, pump installation, groundwater protection, Illinois IDPH regulations, and professional practice.

What is the passing score for the IL well driller exam?

A minimum score of 70% is required to pass the Illinois well driller licensing examination.

What experience is required for an Illinois well driller license?

Illinois requires experience working under a licensed driller before you can sit for the licensing exam. Contact the IDPH for current requirements.

How often must the Illinois well driller license be renewed?

License renewal requirements include completing continuing education hours. Contact the IDPH for the current renewal cycle and CE requirements.