CPI Requirements 2026: Eligibility, Prerequisites & How to Qualify

What the CPI Credential Actually Requires

Certified Pump Installer (CPI) is a voluntary, individual credential governed by the National Ground Water Association (NGWA). Exams are delivered through the testing provider PSI Services. Before you spend time on practice questions, it helps to understand that this credential has two distinct gates: a set of eligibility requirements that prove you have worked in the field, and an examination route that tests whether you know the job. Passing the exams alone does not make you certified, and meeting the experience threshold alone does not either.

It is also worth being precise about what the credential is not. CPI is an individual certification, not a company certification, and it is not a substitute for a state license. If your state requires licensing or registration for pump installers or water well contractors, that obligation sits on top of, not inside, this credential. If you are still orienting yourself, our explainers on what CPI certification is and what CPI stands for cover the basics, and the CPI certification overview gives the wider picture.

Age, Experience and Reference Requirements

NGWA sets the following baseline for applicants. Each item below is something you need to be able to demonstrate, not just claim.

• Minimum age: at least 20 years old.
• Experience: 24 consecutive months of full-time drilling and/or pump-installation experience. Note the word "consecutive" and the "full-time" qualifier; sporadic seasonal work or part-time helper hours may not satisfy the standard, so confirm with NGWA if your history is irregular.
• Professional references: two written references from people who are unaffiliated with your current employer. This is deliberate: it asks for outside validation of your work from, for example, a past supervisor, a customer-facing professional contact or an industry peer rather than your present boss alone.
• Application and agreement: a completed application and a signed certification agreement.
• Affidavit of legal standing: the required affidavit addressing your legal and professional standing.

NGWA membership is not required to apply or to test. That is a common point of confusion, so it is worth stating plainly: you can pursue CPI as a non-member.

Documenting your experience

Because the experience requirement is a time-based standard, keep records that show continuity: pay stubs or W-2s, employer letters, job logs, or contractor invoices. If you moved between employers, make sure your timeline shows no gap that undermines the "consecutive" claim. Where you installed submersible, jet or booster systems across residential, agricultural or light commercial settings, note that variety, since it also supports your readiness for the exam content described below.

The Examination Route: General Plus K or L

The complete CPI route requires passing the Water systems general exam plus at least one specialty exam. The specialty is chosen by the scale of systems you work on:

Most candidates choose the specialty that matches their day-to-day work. A residential and small agricultural installer will typically gravitate toward Exam K, while someone working on larger municipal, irrigation or commercial systems will lean toward Exam L. You may take both specialties, but the minimum route is general plus one.

Exam Format, Delivery and Timing

Each required examination follows the same structure:

• 50 questions per examination, in multiple-choice format.
• 60-minute time limit per examination.
• 70% passing standard per examination.
• Computer-based and closed-book, offered year-round at PSI testing centers, with results available immediately.

On the minimum two-exam route, that adds up to 100 questions and two hours across two separately timed examinations. It is important not to picture this as a single 100-question test or one uninterrupted two-hour sitting. Each exam is its own timed session with its own pass/fail result. You can read a more detailed treatment of the cut score in our CPI passing score guide, and the question of how demanding the tests are in how hard the CPI exam is.

Closed-book means field knowledge has to be internalized

Because the exams are closed-book, you cannot look up friction-loss tables, wire sizing charts or pressure-tank formulas mid-test. Fluency matters: recognizing how a drawdown figure affects pump selection, or what a pressure-switch setting implies about tank sizing, needs to be second nature. NGWA's preparation materials describe the closed-book policy and provide a reference matrix, but they vary reference coverage by examination and do not establish that every duty appears on every component exam. Treat any official guide as preparation direction rather than a precise blueprint.

Scheduling

Since testing is available year-round, there is no fixed annual exam date to chase. Scheduling is driven by your readiness and your 12-month window, which we cover below. For timing details, see our CPI exam dates and scheduling guide.

The Seven Job-Duty Areas Behind the Exam

NGWA's DACUM Research Chart for Pump Installers (developed June 12-13, 2003) organizes the pump installer's work into seven occupational-duty headings. These are best understood as job-task competencies that guide preparation. They are not an official exam-domain count, and no percentage weights are published in the retrieved preparation sources, so avoid any study resource that claims exact domain percentages. NGWA's separate 2019 preparation guide uses six preparation categories and omits the administrative duty, which is another reason to treat the seven headings as a competency map rather than a scoring blueprint. Our full domains guide goes deeper; here is a requirements-oriented summary.

An important qualification: the November 1, 2009 examination-category date still shown on NGWA's current examination page, and the 2003 DACUM date, do not establish that a newly revised 2026 exam exists. In practical terms, expect the core installation, sizing, electrical and troubleshooting knowledge that has long defined this work, not a sudden overhaul.

Fees and What They Do Not Cover

The fee is US$75 per examination, and it is the same for members and non-members. Where older application or FAQ material suggests a member discount, the current examination-specific tariff takes precedence. On the minimum general-plus-one-specialty route, that means exam fees of US$150.

Treat US$150 as the minimum examination cost, not an all-in certification price. Retakes, study materials and any state-specific licensing are separate budget lines. Our CPI certification cost breakdown walks through the full budget, and if you are weighing the investment, see whether CPI certification is worth it and the CPI salary guide.

Enrollment Deadlines and the 12-Month Windows

Two separate 12-month clocks govern the process, and mixing them up is a common planning error:

1. Exam window: the required examinations (general plus your specialty) must be passed within one 12-month period. If you pass the general exam but wait too long to pass the specialty, you risk running out the clock.
2. Enrollment window: certification enrollment must be completed within 12 months of passing the qualifying examination.

Keeping the Credential: CEPs and Renewal

Certification is not a one-time event. Annual maintenance requires:

• Seven continuing education points (CEPs). These are points, not classroom hours, so do not assume one hour of class equals one CEP. Check how NGWA credits each activity.
• A renewal fee.
• An affidavit addressing professional standing and any required licensure.

When the clock starts

The initial certificate expires December 31 of the year following certification. Newly certified individuals earn and report their first CEPs in that following year. Renewal requirements are due December 31.

The deadline and late-fee discrepancy

Here the source material conflicts, and you should verify before relying on any single reading. The maintenance webpage and the reverse of the renewal form accept renewal applications through January 31 without a late fee. However, the front page of that same form instructs applicants to add a US$50 late fee after December 31. The currently linked form is titled "2027 NGWA Voluntary Certification Renewal" despite its 2026 filename, and lists CPI renewal at US$50 for members and US$150 for non-members. Because these instructions contradict each other, confirm the applicable deadline and any late fee directly with NGWA instead of assuming the grace period applies. The safest approach is to submit by December 31.

Sequencing Your Preparation Around the Requirements

Because of the 12-month exam window, a short, deliberate schedule beats open-ended studying. The sketch below ties each phase to the job-duty areas and to the paperwork, and it assumes you have already confirmed you meet the experience standard.

Troubleshooting gets its own late-stage block because it draws on everything earlier: you cannot diagnose short cycling without understanding tank sizing and switch settings. For timed, closed-book rehearsal, use the CPI practice tests and review the CPI cheat sheet as a final recall check. Employers and roles that value this credential are discussed in our CPI jobs overview, and our pass rate article explains why no verified figure should be taken for granted.

Frequently Asked Questions