11/20/2014 — This page is being updated. Please check back later.


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To achieve NGWA certification, contractors must pass exams testing their technical knowledge, and they must have at least twenty-four consecutive months of full-time ground water contracting experience. They maintain their certification by obtaining continuing education credits annually.

NGWA certification designations include:

  • Certified Well Driller (CWD) – Encompasses general industry knowledge, as well as practice and expertise in at least one drilling method.
  • Certified Vertical Closed Loop Driller (CVCLD)— An individual who knows the skills and competencies associated with constructing a loop well used in geothermal heating and cooling systems.
  • Certified Pump Installer (CPI) – Encompasses general industry knowledge and practice and expertise in water systems.
  • Master Ground Water Contractor (MGWC) – Demonstrates a high level of competency in both drilling operations and water systems.