What Is CPI?

CPI Defined: The Certified Pump Installer Credential

On this site, CPI means Certified Pump Installer. It is a professional certification for people who install pumping systems, particularly in the water well and groundwater industry. The acronym is shared by several unrelated credentials and terms, so it helps to be precise: nothing in this article applies to any other "CPI." If you arrived looking for a quick definition, the shorter explainers on what CPI stands for and CPI meaning cover the naming question, while this article goes deeper into how the credential actually works.

The credential recognizes demonstrated knowledge and field experience. It is awarded to an individual, not to a company, and it is voluntary. It is not a substitute for a state license where one is required, a distinction that matters if you work in a jurisdiction with its own contractor rules.

Who Issues It and What It Is (and Isn't)

The certification is governed by the National Ground Water Association (NGWA), and examinations are delivered through the testing provider PSI Services. NGWA membership is not required to sit for the exams or earn the credential, although members and non-members may see different pricing on some related items such as renewal.

If you want the plain-language version of the credential's purpose, see What Is CPI Certification? For eligibility details in full, the dedicated CPI requirements guide goes further than the summary below.

Exam Format: Three Exams, One Credential

CPI is not a single test. It is built from separate examinations, and understanding the structure early prevents scheduling mistakes.

• Water systems general exam: required for everyone pursuing the credential.
• Exam K: specialty for water systems less than 100 gpm.
• Exam L: specialty for water systems more than 100 gpm.

The complete route requires the general exam plus at least one specialty. You choose K or L based on the kind of systems you actually work on.

Across the minimum route that adds up to 100 questions and two hours of testing, but it is two separately timed 50-question exams, not one combined 100-question sitting. The multiple-choice format is also corroborated by the New York State Department of Labor's water well contractor page, though that state's own licensing and fee rules do not apply to this voluntary credential.

The 70% line is explored further in the CPI passing score article, and scheduling logistics are covered in CPI exam dates.

The Seven Occupational Duties

The seven content areas used on this site come from NGWA's DACUM Research Chart for Pump Installers, developed June 12-13, 2003 and linked from its current certification-examination page. They are job-task competencies and make an excellent preparation framework, but read the following caveat carefully.

For a duty-by-duty walkthrough, read the CPI exam domains guide.

Eligibility and Enrollment Mechanics

Passing the exams is only part of earning the credential. NGWA also sets experience and documentation requirements:

• Applicants must be at least 20 years old.
• 24 consecutive months of full-time drilling and/or pump-installation experience.
• Two written professional references from people unaffiliated with your current employer.
• A completed application, a signed certification agreement and the required affidavit of legal standing.
• Certification enrollment must be completed within 12 months of passing the qualifying examination.

Fees: What the Numbers Do and Don't Cover

The examination fee is US$75 per examination for both members and non-members. Since the minimum route is two exams, the minimum examination fees come to US$150. That figure is exam fees only. It is not an all-in certification price, so budget separately for anything else on your path. The current examination-specific tariff takes precedence over generic member-discount wording that may still appear in older application or FAQ material, which is a common source of confusion.

The full picture, including how retakes and ongoing costs fit in, is in the CPI certification cost breakdown.

Keeping the Credential Current

Certification is not permanent. Annual maintenance involves three pieces: seven continuing education points (CEPs), a renewal fee, and an affidavit addressing professional standing and required licensure. CEPs are a points system, so do not translate them into seven classroom hours.

The timeline works like this: the initial certificate expires December 31 of the year following certification, and newly certified individuals earn and report their first CEPs in that following year. Renewal requirements are due December 31, and the maintenance webpage and the reverse of the renewal form accept applications through January 31 without a late fee.

Who Values It

The credential is most relevant to people in the water well and pump installation trade: pump installers, well drillers who also install pumps, and the contractors and service companies that employ them. Because CPI is a voluntary individual credential, its value depends on your market. Some employers and customers look for it as evidence of competence; in other places a state license carries the real regulatory weight. For earnings context see the CPI salary guide, and for a cost-benefit view read Is the CPI certification worth it? Job-search angles are in CPI jobs.

Sequencing Your Preparation

The only generic advice worth giving here is how to order the seven duties so the later ones build on the earlier ones. Because the exams are closed-book, you need to be able to recall specifics, not just look them up.

For a fuller method, the CPI study guide and the one-page CPI cheat sheet are good companions. To test yourself against exam-style questions, try the CPI practice tests. If you are weighing difficulty before committing, see how hard the CPI exam is, and for outcome data read what the pass-rate data shows.

Frequently Asked Questions