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VideoFree Well Driller Practice Test by State 2026: 2,500+ QuestionsArticleFree Well Driller Practice Test by State 2026: 2,500+ Questions21 min read
Exam Review

Key Facts: CO 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

$150

License Fee

LicenseMap 2026

Colorado requires well drillers and pump installers to pass a state licensing exam covering well construction standards, groundwater protection, and Division of Water Resources regulations.

Sample CO Well Driller Practice Questions

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

1Which Colorado board is responsible for licensing water well drillers and pump installers?
A.Board of Examiners of Water Well and Ground Heat Exchanger Contractors
B.Colorado Water Conservation Board
C.State Engineer's Office only
D.Colorado Department of Public Health
Explanation: The Board of Examiners of Water Well and Ground Heat Exchanger Contractors (formerly Board of Examiners of Water Well Construction and Pump Installation Contractors) is responsible for licensing under CRS Title 37, Article 91. The name was changed by HB 25-1165 to include ground heat exchanger contractors.
2How many years of supervised experience are required to obtain a Colorado water well contractor license?
A.2 years
B.3 years
C.1 year
D.5 years
Explanation: Colorado requires a minimum of 2 years of supervised experience in well construction or pump installation before an applicant can sit for the licensing examination. The experience must be documented and verified as part of the application process.
3What types of examinations must a Colorado well driller license applicant pass?
A.Both a written and oral examination
B.Only a written exam
C.Only a practical field test
D.No exam is required
Explanation: Under 2 CCR 402-14, Rule 6.6, Colorado requires applicants to demonstrate professional competence by passing both a written examination (testing technical knowledge) and an oral examination prescribed by the Board of Examiners.
4What are the two primary license types for water-related work in Colorado?
A.Water Well Contractor and Pump Installer
B.Master Driller and Journeyman Driller
C.Commercial and Residential
D.Federal and State
Explanation: Colorado issues separate licenses for Water Well Contractors (who drill and construct wells) and Pump Installers (who install pumping equipment). Each requires separate experience, examination, and licensing. Some contractors hold both license types (dual license).
5What continuing education is required for Colorado well driller license renewal?
A.4 hours per renewal period
B.No CE is required
C.20 hours per year
D.8 hours per year
Explanation: Colorado requires 4 hours of continuing education for each license renewal period. Under SB 03-045, CE is a condition of renewal. Content must relate to groundwater, well standards, geological characteristics, regulations, or pump installation practices.
6When do Colorado well driller licenses expire?
A.January 15 annually
B.December 31 annually
C.June 30 annually
D.September 30 annually
Explanation: Colorado well driller and pump installer licenses expire on January 15th each year. Renewal applications with fees must be submitted by February 1 of the renewal year. Late renewals require a $100 reinstatement fee.
7What is the late renewal reinstatement fee for a Colorado well driller license?
A.$100
B.$50
C.$200
D.$500
Explanation: If a Colorado well driller fails to renew by the deadline, a $100 reinstatement fee is required in addition to the regular renewal fee. Licenses can be renewed for 1-3 year terms.
8What Colorado regulation establishes the minimum standards for well construction?
A.2 CCR 402-2 (Water Well Construction Rules)
B.2 CCR 402-14 (Administration Rules)
C.CRS Title 25 (Public Health)
D.CRS Title 36 (Parks)
Explanation: The Water Well Construction Rules, codified at 2 CCR 402-2, establish minimum standards for construction materials and methods for water wells in Colorado. The most recent revision was adopted in May 2025 with an effective date of January 1, 2026.
9What is required before a well can be drilled in Colorado?
A.A state well permit from the Division of Water Resources
B.Only a local building permit
C.No permit is required
D.A federal EPA permit
Explanation: Colorado requires a state well permit from the Division of Water Resources per CRS 37-90-137 before any well construction can begin. Even exempt (domestic) wells generally require a permit or registration. The driller must verify a valid permit exists before starting work.
10Within how many days of well completion must the Well Construction and Test Report be filed in Colorado?
A.60 days
B.30 days
C.90 days
D.15 days
Explanation: Colorado requires the Well Construction and Test Report to be filed within 60 days of well completion. The pump installation completion report is also due within 60 days after pump installation is complete.

About the CO Well Driller Exam

The Colorado well driller exam covers state well construction standards, casing and grouting requirements, pump installation, groundwater protection, DWR licensing regulations, well abandonment procedures, and professional practice under Colorado water law.

Exam sponsor: Colorado Division of Water Resources. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

100 questions

Time Limit

2 hours

Passing Score

70%

Exam / Certification Fees

$150

Exam sponsor website

Reported exam pass rate: 70%. estimated first-time pass rate This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

25%

Well Construction

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

20%

Pump Installation

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

20%

Regulations

DWR licensing, well permits, reporting requirements, fees, CE requirements

20%

Groundwater

Aquifer protection, water quality, contamination prevention, Colorado geology

15%

Professional Practice

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

Preparing for the CO Well Driller Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 100 questions
  • Time limit: 2 hours
  • Exam / certification fees: $150 Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CO Well Driller: Suggested Study Strategy

1Master Colorado's well construction standards and casing requirements under DWR rules
2Understand proper grouting procedures and materials for Colorado's varied geology
3Study pump types, sizing calculations, and electrical connection requirements
4Know groundwater protection measures and Colorado water rights law
5Review well log documentation requirements and abandonment procedures

Frequently Asked Questions

What does the Colorado well driller exam cover?

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

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

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

What experience is required for a Colorado well driller license?

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

How often must the Colorado well driller license be renewed?

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