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North Carolina Water Purification & Sewage Disposal


The Water Purification and Sewage Disposal classification covers the performance of construction work on septic systems, water and wastewater treatment facilities and covers all site-work, grading, and paving of parking lots, driveways, sidewalks, and curbs and gutters that are ancillary to such construction of water and wastewater treatment facilities. It covers the work done under the specialty classifications of Concrete, Insulation, Interior construction, Masonry, Roofing, and Metal Erection as part of the work on water and wastewater treatment facilities also.

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Required Books 

The references listed below are necessary to prepare for the examination, however they will not be allowed into the testing center. The Board will supply all required reference materials at the test center.

Add All Required Books to Cart ($780.75)

Additional Services

  • Pre-approval from the state is required to sit for the examination.
  • Please note a separate North Carolina Business and Law exam is not needed, that information is incorporated into the Water Purification and Sewage Disposal exam.
  • i>A license is required for projects that are $30,000 or more./i>
  • There is no minimum experience requirement. Applicants must submit 3 names as references.

    All licenses covered by the commercial licensing board are divided into 3 financial categories:

  • Limited: Applicants must have a minimum working capital of $17,000. This level allows bids up to $500,000 per single project.
  • Intermediate: Applicants must have a minimum working capital of $75,000. This level allows bids up to $1,000,000 per single project.
  • Unlimited: Applicants must have a minimum working capital of $150,000. This level has no restrictions as to the value of any single project.

    Applicants for the Intermediate and Unlimited license must submit audited financial statements with classified balance sheets prepared by a CPA or independent accountant engaged in the public practice of accounting.

    Surety bonds are required for applicants with insufficient working capital. The board may request that a surety bond and payment bond be obtained for jobs above a certain monetary level.

The Water Purification and Sewage Disposal classification covers the performance of construction work on septic systems, water and wastewater treatment facilities and covers all site-work, grading, and paving of parking lots, driveways, sidewalks, and curbs and gutters that are ancillary to such construction of water and wastewater treatment facilities. It covers the work done under the specialty classifications of Concrete, Insulation, Interior construction, Masonry, Roofing, and Metal Erection as part of the work on water and wastewater treatment facilities also.

To apply, contact State of North Carolina Licensing Board 1-919-571-4183.

The licensing fees are: Limited $75, Intermediate $100, and Unlimited $125.

Applications are cleared for approval to take the exam as soon as they are received. However, once exams are passed, applications are submitted to the board for review.

Applications must be submitted the 1st week of the month prior to the next board meeting (ex. 1st week of June for July approval).

The board meets once per month in every month except December. Therefore, processing time would be 1 to 2 months depending on the date submitted to the board.

All general contractors licenses expire December 31 each calendar year and normally are not issued during the month of December.

Important Contacts

To apply for a General Contractor and related trade licenses, contact:

Licensing Board for General Contractors
Post Office Box 17187
Raleigh, NC 27619
(919)571-4183
Applications and licensing information for Electrical licenses may be obtained be obtained from:

Board of Examiners of Electrical Contractors
PO Box 18727
Raleigh, NC 27619
(919)733-9042
Applications and Exam information for Plumbing, Heating & Fire Sprinkler license may be obtained from:

Board of Examiners of Plumbing, Heating & Fire Sprinklers
1109 Dresser Court
Raleigh, NC 27609
(919)875-3612
For all examinations Contact:

PSI Licensure: Certification
ATTN: Examination Registration NC
3210 E Tropicana
Las Vegas, NV 89121
(800) 733-9267 phone
702.932.2666 fax

North Carolina has reciprocity with South Carolina for this license.

As of this time, there is no continuing education for this license.

  • The fee for the exam is $60 and a score of at least 70% is required to pass the exam.
  • The exam is open book, multiple-choice, and timed.
  • There are 50 questions on the exam with a 2 hour time limit. Not all reference books are allowed into the exam.

    Topics covered on the exam are safety, liens, laws and regulations, One Call, erosion and sedimentation, excavation and grading, formwork, shotcrete, concrete, concrete reinforcement, and water regulations.

  • Once you are approved you will receive an eligibility letter to schedule your testing. The eligibility letter is valid for 120 days from the date on the letter and allows the candidate to take 1 exam within that time frame.
  • To schedule your exam you must contact PSI at 1-800-733-9267.
  • Failing candidates may not retake an exam until at least 30 days after the failed exam.
American Contractors does not currently offer a preparation seminar for the North Carolina Water Purification & Sewage Disposal License. We do carry the references. Please call to see if there are additional items that may assist your preparations.