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Missouri Water Well Driller — Requirements & Free Practice

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Licenses, application pathways and examination requirements

Each license and applicant pathway has its own requirements and exemptions. Choosing practice questions does not determine your eligibility.

Apprentice Water Well Permit

Authorizes the water well apprenticeship under a responsible non-restricted water well permit holder. The ordinary apprenticeship period is two years, subject to reduction or extension under the rule. This survey covers the water well permit type; 10 CSR 23-1.090 distinguishes monitoring well, test hole, closed-loop heat pump and pump permits. Probation is a disciplinary condition on a permit, not a separate initial permit type.

Licensing authority: Missouri Department of Natural Resources, Missouri Geological Survey, Well Installation Section · Application information

Permit an existing water well apprentice under an additional company
No examination is required for this applicant pathway.
Application And Fee
Submit the appropriate application and fee for each permit type.
Existing Apprenticeship
Hold an existing water well apprenticeship.
Form Instruction
MO 780-1731 says "APPLICATION AND EXAM MUST BE COMPLETED PRIOR TO SUBMISSION OF THIS FORM". The existing-apprentice multiple-company rule specifies applications, fees and responsible signatures rather than another examination.
Responsible Parties
A non-restricted permittee from each company must sign as responsible party; separate permit numbers are issued for each permit type.

Official no-examination sources

Effective from 2019-02-28.

Extend the water well apprenticeship after its two year period
No examination is required for this applicant pathway.
Extension Application
Apply to extend the apprenticeship year by year. Without the application, the apprentice permit will not be renewed.
Renewal
Pay the applicable renewal fee and maintain the responsible-party apprenticeship arrangement.
Unfinished Installations
The required installation count has not been met at the end of two years.

Official no-examination sources

Effective from 2019-02-28.

Reapply after canceling the water well apprenticeship
No examination is required for this applicant pathway.
Canceled Apprenticeship
The apprentice previously canceled the apprenticeship.
Form Instruction
MO 780-1731 says "APPLICATION AND EXAM MUST BE COMPLETED PRIOR TO SUBMISSION OF THIS FORM". The specific canceled-apprenticeship rule allows restoration at the existing status upon approved application.
Reapplication Window
Reapply within five years.
Restored Status
If DNR approves the application, reinstatement is at the same status as at cancellation under 10 CSR 23-1.050(3)(J).

Official no-examination sources

Effective from 2019-02-28.

Transfer an existing water well apprenticeship to another company
No examination is required for this applicant pathway.
Application
Submit a new apprenticeship application to DNR, signed by a non-restricted permittee as responsible party.
Existing Apprenticeship
Hold the existing water well apprenticeship to be transferred.
Form Instruction
MO 780-1731 says "APPLICATION AND EXAM MUST BE COMPLETED PRIOR TO SUBMISSION OF THIS FORM". The transfer rule specifies a new application and responsible-party signature; it does not direct a new test.

Official no-examination sources

Effective from 2019-02-28.

Initial apprentice water well permit
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Apprenticeship Period
The apprenticeship is two years; water well installations and the conditions for later non-restricted qualification are prescribed by 10 CSR 23-1.050(3).
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Responsible Party
Submit an apprentice permit application signed by a responsible non-restricted water well permit holder. A non-restricted permittee cannot serve as responsible party for one year after resolution of a DNR enforcement action.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Supervision
A non-restricted permit holder of the same type must oversee work on site and sign installation reports. After the required installations are completed, the apprentice may work independently for the remainder of the apprenticeship if the responsible party continues to sign reports.
Test Delivery
Applicable apprentice tests are open-book online; DNR states a $50 combined testing fee.
Reinstate an expired apprentice water well permit less than one year after expiration
No examination is required for this applicant pathway.
Application
Submit the applicable permit application and fee under 10 CSR 23-1.105(3)(A).
Expiration Interval
Less than one year has elapsed since expiration.
Form Instruction
The April 2024 general application says, "APPLICATION AND EXAM MUST BE COMPLETED PRIOR TO SUBMISSION OF THIS FORM". The specific rule for this reinstatement requires the application and fee; the form instruction is recorded here as DNR implementation material.
Outstanding Violations
Resolve outstanding violations unless DNR has approved a remediation schedule.
Previous Permit
Reinstatement is only for the water well permit type previously held.

Official no-examination sources

Effective from 2019-02-28.

Reinstate an expired apprentice water well permit one year or more after expiration
Application
Submit complete testing and permit applications with the corresponding fees.
Experience Alternative
Provide proof of the required installations under 10 CSR 23-1.050(3)(C), or provide financial responsibility under 10 CSR 23-1.050(5) and complete one year of prenotification.
Expiration Interval
At least one year has elapsed since expiration.
Outstanding Violations
Resolve outstanding violations unless DNR has approved a remediation schedule.
Previous Permit
Reinstatement is only for the permit type previously held.
Test Delivery
Pass applicable restricted open-book and/or non-restricted closed-book tests, according to the permit status sought, with a minimum seventy percent score. Apprentice testing is open-book under 10 CSR 23-1.050(3).
Annual renewal of an existing apprentice water well permit
No examination is required for this applicant pathway.
Apprentice Extension
For an apprentice beyond the two-year period who has not completed the required installations, submit the separate year-by-year extension application prescribed by 10 CSR 23-1.050(3)(I).
Existing Permit
Hold the water well permit to be renewed.
Outstanding Violations
Resolve outstanding violations before renewal unless DNR has approved a remediation schedule.
Renewal Fee
Submit the renewal fee before expiration. DNR states $150 per permit; the renewal rule provides a late fee for payments submitted after expiration.

Official no-examination sources

Effective from 2019-02-28.

New application for apprentice water well permit after revocation
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Department Decision
DNR decides whether to issue a new permit.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Previous Revocation
The applicant has had a permit revoked. Apply under 10 CSR 23-1.050 as a new applicant.
Responsible Party
Obtain the signature and supervision of an eligible non-restricted water well permit holder.
Revocation Assurance
Provide the performance bond or irrevocable letter of credit required by RSMo 256.616. The statute specifies between $1,000 and $10,000, determined using wells drilled or pumps installed and average cost, and cessation after two compliant consecutive years.
Rule Assurance
10 CSR 23-1.050(5) also states a $25,000 financial-responsibility amount; this is recorded as the rule demand rather than replacing the controlling statutory revocation amount.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
New applicants take the applicable open-book tests with minimum seventy percent scores.
Waiting Period
No new permit may issue sooner than one year after revocation takes effect.
Reinstate a suspended apprentice water well permit
No examination is required for this applicant pathway.
Correction And Approval
DNR must approve that the terms and conditions underlying the suspension order have been corrected.
Probation
DNR may place the reinstated permittee on probation.
Suspended Permit
Hold the suspended permit.

Official no-examination sources

Effective from 2019-02-28.

Non-Restricted Water Well Permit

Authorizes water well drilling, repair, reconstruction and plugging, including open-loop supply and return heat pump wells. Initial issuance includes apprenticeship and qualifying out-of-state apprenticeship-exemption pathways. This survey covers the water well permit type; 10 CSR 23-1.090 distinguishes monitoring well, test hole, closed-loop heat pump and pump permits. Probation is a disciplinary condition on a permit, not a separate initial permit type.

Licensing authority: Missouri Department of Natural Resources, Missouri Geological Survey, Well Installation Section · Application information

Add a non restricted water well permit to an existing Missouri permit
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Existing Permit
Current Missouri permit holders other than pump installation permit holders may add the water well permit type under 10 CSR 23-1.050(7)(A).
Financial Responsibility
If using the alternative to the apprenticeship, provide the financial responsibility prescribed by 10 CSR 23-1.050(5).
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Prenotification
If using the alternative to the apprenticeship, complete one year of prenotification under 10 CSR 23-1.050(6).
Qualification Alternative
Complete the water well apprenticeship, or submit proof of financial responsibility and complete one year of prenotification.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
Pass both applicable restricted open-book and non-restricted closed-book tests with minimum seventy percent scores.
Initial non restricted permit after water well apprenticeship
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Apprenticeship
Complete the two-year water well apprenticeship under 10 CSR 23-1.050(3).
Experience From Elsewhere
Under 10 CSR 23-1.050(3)(K), apprentice work performed outside Missouri is evaluated case by case toward the installation requirement.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Supervision
A non-restricted permit holder of the same type must oversee work on site and sign installation reports. After the required installations are completed, the apprentice may work independently for the remainder of the apprenticeship if the responsible party continues to sign reports.
Test Delivery
Pass the General Test and Water Well Contractor Test using closed-book testing in person; DNR schedules tests at 111 Fairgrounds Road, Rolla.
Violations
The permit application may be denied for unresolved violations. After violations are resolved, DNR may require prenotification under 10 CSR 23-1.050(6).
Water Well Installations
Complete and sign certification or registration forms for at least twenty-five different domestic or multifamily water well installations, or ten different high-yield bedrock or public wells. Plugging abandoned wells of the applicable type may count for up to ten percent of the required installations.
Reinstate an expired non restricted water well permit less than one year after expiration
No examination is required for this applicant pathway.
Application
Submit the applicable permit application and fee under 10 CSR 23-1.105(3)(A).
Expiration Interval
Less than one year has elapsed since expiration.
Form Instruction
The April 2024 general application says, "APPLICATION AND EXAM MUST BE COMPLETED PRIOR TO SUBMISSION OF THIS FORM". The specific rule for this reinstatement requires the application and fee; the form instruction is recorded here as DNR implementation material.
Outstanding Violations
Resolve outstanding violations unless DNR has approved a remediation schedule.
Previous Permit
Reinstatement is only for the water well permit type previously held.

Official no-examination sources

Effective from 2019-02-28.

Reinstate an expired non restricted water well permit one year or more after expiration
Application
Submit complete testing and permit applications with the corresponding fees.
Experience Alternative
Provide proof of the required installations under 10 CSR 23-1.050(3)(C), or provide financial responsibility under 10 CSR 23-1.050(5) and complete one year of prenotification.
Expiration Interval
At least one year has elapsed since expiration.
Outstanding Violations
Resolve outstanding violations unless DNR has approved a remediation schedule.
Previous Permit
Reinstatement is only for the permit type previously held.
Test Delivery
Pass applicable restricted open-book and/or non-restricted closed-book tests, according to the permit status sought, with a minimum seventy percent score. Apprentice testing is open-book under 10 CSR 23-1.050(3).
Initial non restricted permit with out of state apprenticeship exemption
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Apprenticeship Exemption
Request DNR exemption from the apprenticeship under 10 CSR 23-1.050(3)(L); this is not an examination waiver.
Existing Permit
Hold a valid permit of the same type outside Missouri and submit its copy, examples of well records, and contact information for the issuing regulatory agency. No other jurisdiction is investigated by this survey.
Financial Responsibility
10 CSR 23-1.050(5) specifies a $25,000 surety bond, certificate of deposit or irrevocable letter of credit payable to DNR from an authorized institution, held for two years; provide and maintain financial responsibility for the required period.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Prenotification
Complete one year of advance notice for regulated work under 10 CSR 23-1.050(6); notice is due twenty-four hours before work and includes the work, owner, address, GPS location and start date.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
Pass the applicable Missouri non-restricted closed-book tests with a minimum seventy percent score.
Add a non restricted water well permit as a pump installation permit holder
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Apprenticeship
Complete the two-year water well apprenticeship under 10 CSR 23-1.050(3).
Existing Permit
Hold a Missouri pump installation permit; 10 CSR 23-1.050(7)(C) requires the apprenticeship to add another permit type.
Experience From Elsewhere
Under 10 CSR 23-1.050(3)(K), apprentice work performed outside Missouri is evaluated case by case toward the installation requirement.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Supervision
A non-restricted permit holder of the same type must oversee work on site and sign installation reports. After the required installations are completed, the apprentice may work independently for the remainder of the apprenticeship if the responsible party continues to sign reports.
Test Delivery
Complete the water well apprenticeship and pass the applicable non-restricted closed-book tests. The applicable open-book apprentice testing is required on entry to the apprenticeship.
Water Well Installations
Complete and sign certification or registration forms for at least twenty-five different domestic or multifamily water well installations, or ten different high-yield bedrock or public wells. Plugging abandoned wells of the applicable type may count for up to ten percent of the required installations.
Initial non restricted permit with reduced apprenticeship period
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Completed Installations
Complete and sign certification or registration forms for at least twenty-five different domestic or multifamily water well installations, or ten different high-yield bedrock or public wells. Plugging abandoned wells of the applicable type may count for up to ten percent of the required installations.
Early Completion
DNR may reduce the two-year apprenticeship when the required installations are met and proof of financial responsibility is provided for the remainder under 10 CSR 23-1.050(3)(F).
Financial Responsibility
Provide financial responsibility under 10 CSR 23-1.050(5) for the remainder of the apprenticeship period as required by 10 CSR 23-1.050(3)(F).
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
Applicable non-restricted tests remain closed-book with a minimum seventy percent score.
Annual renewal of an existing non restricted water well permit
No examination is required for this applicant pathway.
Existing Permit
Hold the water well permit to be renewed.
Outstanding Violations
Resolve outstanding violations before renewal unless DNR has approved a remediation schedule.
Renewal Fee
Submit the renewal fee before expiration. DNR states $150 per permit; the renewal rule provides a late fee for payments submitted after expiration.

Official no-examination sources

Effective from 2019-02-28.

New application for non restricted water well permit after revocation
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Apprenticeship
Complete the two-year water well apprenticeship under 10 CSR 23-1.050(3).
Department Decision
DNR decides whether to issue a new permit.
Experience From Elsewhere
Under 10 CSR 23-1.050(3)(K), apprentice work performed outside Missouri is evaluated case by case toward the installation requirement.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Previous Revocation
The applicant has had a permit revoked. Apply under 10 CSR 23-1.050 as a new applicant.
Revocation Assurance
Provide the performance bond or irrevocable letter of credit required by RSMo 256.616. The statute specifies between $1,000 and $10,000, determined using wells drilled or pumps installed and average cost, and cessation after two compliant consecutive years.
Rule Assurance
10 CSR 23-1.050(5) also states a $25,000 financial-responsibility amount; this is recorded as the rule demand rather than replacing the controlling statutory revocation amount.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Supervision
A non-restricted permit holder of the same type must oversee work on site and sign installation reports. After the required installations are completed, the apprentice may work independently for the remainder of the apprenticeship if the responsible party continues to sign reports.
Test Delivery
New applicants take the applicable closed-book tests with minimum seventy percent scores.
Waiting Period
No new permit may issue sooner than one year after revocation takes effect.
Water Well Installations
Complete and sign certification or registration forms for at least twenty-five different domestic or multifamily water well installations, or ten different high-yield bedrock or public wells. Plugging abandoned wells of the applicable type may count for up to ten percent of the required installations.
Reinstate a suspended non restricted water well permit
No examination is required for this applicant pathway.
Correction And Approval
DNR must approve that the terms and conditions underlying the suspension order have been corrected.
Probation
DNR may place the reinstated permittee on probation.
Suspended Permit
Hold the suspended permit.

Official no-examination sources

Effective from 2019-02-28.

Restricted Water Well Permit

Authorizes contracting or subcontracting regulated water well work and acting as primary contractor or on-site drilling supervisor; field work requiring a non-restricted permit is governed by 10 CSR 23-1.090(1). This survey covers the water well permit type; 10 CSR 23-1.090 distinguishes monitoring well, test hole, closed-loop heat pump and pump permits. Probation is a disciplinary condition on a permit, not a separate initial permit type.

Licensing authority: Missouri Department of Natural Resources, Missouri Geological Survey, Well Installation Section · Application information

Add a restricted water well permit to an existing Missouri permit
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Existing Permit
Current Missouri permit holders other than pump installation permit holders may add water well as an additional permit type under 10 CSR 23-1.050(7)(A).
Financial Responsibility
If using the alternative to the apprenticeship, provide the financial responsibility prescribed by 10 CSR 23-1.050(5).
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Prenotification
If using the alternative to the apprenticeship, complete one year of prenotification under 10 CSR 23-1.050(6).
Qualification Alternative
The additional-permit rule requires the apprenticeship or financial responsibility and one year of prenotification.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
The additional-permit rule requires applicable restricted open-book and non-restricted closed-book tests with minimum seventy percent scores.
Initial restricted water well permit
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Restricted Scope
Contract or subcontract regulated water well work or act as primary contractor or on-site drilling supervisor under 10 CSR 23-1.090(1)(C)-(D).
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
Applicable tests are open-book online in WIMS 2.0. DNR states a $50 testing fee for all tests combined.
Violations
DNR may deny an application for unresolved violations.
Reinstate an expired restricted water well permit less than one year after expiration
No examination is required for this applicant pathway.
Application
Submit the applicable permit application and fee under 10 CSR 23-1.105(3)(A).
Expiration Interval
Less than one year has elapsed since expiration.
Form Instruction
The April 2024 general application says, "APPLICATION AND EXAM MUST BE COMPLETED PRIOR TO SUBMISSION OF THIS FORM". The specific rule for this reinstatement requires the application and fee; the form instruction is recorded here as DNR implementation material.
Outstanding Violations
Resolve outstanding violations unless DNR has approved a remediation schedule.
Previous Permit
Reinstatement is only for the water well permit type previously held.

Official no-examination sources

Effective from 2019-02-28.

Reinstate an expired restricted water well permit one year or more after expiration
Application
Submit complete testing and permit applications with the corresponding fees.
Experience Alternative
Provide proof of the required installations under 10 CSR 23-1.050(3)(C), or provide financial responsibility under 10 CSR 23-1.050(5) and complete one year of prenotification.
Expiration Interval
At least one year has elapsed since expiration.
Outstanding Violations
Resolve outstanding violations unless DNR has approved a remediation schedule.
Previous Permit
Reinstatement is only for the permit type previously held.
Test Delivery
Pass applicable restricted open-book and/or non-restricted closed-book tests, according to the permit status sought, with a minimum seventy percent score. Apprentice testing is open-book under 10 CSR 23-1.050(3).
Annual renewal of an existing restricted water well permit
No examination is required for this applicant pathway.
Existing Permit
Hold the water well permit to be renewed.
Outstanding Violations
Resolve outstanding violations before renewal unless DNR has approved a remediation schedule.
Renewal Fee
Submit the renewal fee before expiration. DNR states $150 per permit; the renewal rule provides a late fee for payments submitted after expiration.

Official no-examination sources

Effective from 2019-02-28.

New application for restricted water well permit after revocation
Application
Submit the testing application and fee, pass applicable tests, then submit the permit application and permit fee. DNR currently states a $150 fee for each permit.
Department Decision
DNR decides whether to issue a new permit.
Identification
MO 780-1731 requires a Social Security number to take the examination or obtain a permit.
Minimum Age
RSMo 256.611 requires applicants to be at least eighteen years old.
Online Access
WIMS 2.0 contractor functions require an OKTA account; the official transition applies to new and existing users starting June 15, 2026.
Passing Score
At least seventy percent on each applicable test.
Previous Revocation
The applicant has had a permit revoked. Apply under 10 CSR 23-1.050 as a new applicant.
Revocation Assurance
Provide the performance bond or irrevocable letter of credit required by RSMo 256.616. The statute specifies between $1,000 and $10,000, determined using wells drilled or pumps installed and average cost, and cessation after two compliant consecutive years.
Rule Assurance
10 CSR 23-1.050(5) also states a $25,000 financial-responsibility amount; this is recorded as the rule demand rather than replacing the controlling statutory revocation amount.
Rules Knowledge
RSMo 256.611 requires knowledge of the rules and regulations adopted under sections 256.600 to 256.640.
Test Delivery
New applicants take the applicable open-book tests with minimum seventy percent scores.
Waiting Period
No new permit may issue sooner than one year after revocation takes effect.
Reinstate a suspended restricted water well permit
No examination is required for this applicant pathway.
Correction And Approval
DNR must approve that the terms and conditions underlying the suspension order have been corrected.
Probation
DNR may place the reinstated permittee on probation.
Suspended Permit
Hold the suspended permit.

Official no-examination sources

Effective from 2019-02-28.

Missouri Well and Pump Installation Contractor General Test

Provider
Missouri Department of Natural Resources, Well Installation Section
Format
Open-book online for restricted contractors and apprentices; closed-book in person for non-restricted contractors.
Passing score
At least 70 percent.
Exam fee
$50 per test for non-restricted testing; DNR states a $50 combined testing fee for restricted and apprentice online tests.
Practice scope

The authority has not published an examination outline; the practice questions follow the scope of the existing question bank.

  • Definitions and Regulated Scope
    • Water well terminology and classifications
    • Contractor responsibility and regulated permit scope
  • Variances and Prior Approvals
    • Variance eligibility, contents, timing, and approval
  • Permits and Contractor Duties
    • Restricted permit authority and conditions
    • Permit maintenance, investigations, and corrective action
  • Records, Equipment, and Notifications
    • Certification, registration, vehicles, and contact updates
Examination sources

Missouri Water Well Contractor Test

Provider
Missouri Department of Natural Resources, Well Installation Section
Format
Open-book online for restricted contractors and apprentices; closed-book in person for non-restricted contractors.
Passing score
At least 70 percent.
Exam fee
$50 per test for non-restricted testing; DNR states a $50 combined testing fee for restricted and apprentice online tests.
Practice scope

The authority has not published an examination outline; the practice questions follow the scope of the existing question bank.

  • Well Siting and Groundwater Protection
    • Location, drainage, casing height, and contamination setbacks
    • Groundwater safeguards during construction and repair
  • Water Well Construction
    • Casing materials, joints, installation, and boreholes
    • Grout materials, cure times, and placement methods
    • Multifamily, high-yield, public, and oil-or-gas-zone wells
  • Wellhead Completion, Disinfection, and Liners
    • Wellhead protection and disinfection
    • Liner materials, placement, packers, and seals
  • Missouri Drilling Areas
    • Construction and contamination controls in Drilling Areas 1 through 13
  • Water Well Plugging
    • Responsibility, preparation, materials, and plugging methods
Examination sources